diff --git a/app/src/main/java/com/knowre/android/kal/MainActivity.kt b/app/src/main/java/com/knowre/android/kal/MainActivity.kt
index f5c6cab..d5a0cd6 100644
--- a/app/src/main/java/com/knowre/android/kal/MainActivity.kt
+++ b/app/src/main/java/com/knowre/android/kal/MainActivity.kt
@@ -8,7 +8,6 @@ import androidx.navigation.findNavController
 import androidx.navigation.ui.AppBarConfiguration
 import androidx.navigation.ui.navigateUp
 import androidx.navigation.ui.setupActionBarWithNavController
-import com.google.android.material.snackbar.Snackbar
 import com.knowre.android.kal.databinding.ActivityMainBinding
 
 class MainActivity : AppCompatActivity() {
@@ -27,10 +26,6 @@ class MainActivity : AppCompatActivity() {
         val navController = findNavController(R.id.nav_host_fragment_content_main)
         appBarConfiguration = AppBarConfiguration(navController.graph)
         setupActionBarWithNavController(navController, appBarConfiguration)
-
-        binding.fab.setOnClickListener { view ->
-            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG).setAction("Action", null).show()
-        }
     }
 
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
diff --git a/app/src/main/java/com/knowre/android/kal/myscript/Candidate.kt b/app/src/main/java/com/knowre/android/kal/myscript/Candidate.kt
new file mode 100644
index 0000000..b3c8343
--- /dev/null
+++ b/app/src/main/java/com/knowre/android/kal/myscript/Candidate.kt
@@ -0,0 +1,9 @@
+package com.knowre.android.kal.myscript
+
+
+internal sealed class Candidate {
+
+    class Data(val itemId: String, val label: String) : Candidate()
+
+    class Exit() : Candidate()
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/knowre/android/kal/myscript/CandidateAdapter.kt b/app/src/main/java/com/knowre/android/kal/myscript/CandidateAdapter.kt
new file mode 100644
index 0000000..44fbd33
--- /dev/null
+++ b/app/src/main/java/com/knowre/android/kal/myscript/CandidateAdapter.kt
@@ -0,0 +1,81 @@
+package com.knowre.android.kal.myscript
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+import com.knowre.android.kal.databinding.ViewCandidateItemBinding
+
+
+internal class CandidateAdapter(
+    private val onCandidateClicked: (Candidate.Data) -> Unit,
+    private val onExitClicked: () -> Unit
+) : RecyclerView.Adapter<CandidateViewHolder>() {
+
+    private var candidates = listOf<Candidate>()
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CandidateViewHolder {
+        return CandidateViewHolder.newInstance(parent,
+            onCandidateClicked = {
+                clear()
+                onCandidateClicked(it)
+            },
+            onExitClicked = {
+                clear()
+                onExitClicked()
+            }
+        )
+    }
+
+    override fun onBindViewHolder(holder: CandidateViewHolder, position: Int) {
+        holder.bind(candidates[position])
+    }
+
+    override fun getItemCount() = candidates.size
+
+    fun setCandidates(candidates: List<Candidate>) {
+        this.candidates = candidates
+            .toMutableList()
+            .apply { if (isNotEmpty()) add(Candidate.Exit()) }
+            .also { notifyDataSetChanged() }
+    }
+
+    fun clear() {
+        this.candidates = listOf()
+        notifyDataSetChanged()
+    }
+}
+
+internal class CandidateViewHolder(
+    private val binding: ViewCandidateItemBinding
+) : RecyclerView.ViewHolder(binding.root) {
+
+    private lateinit var candidate: Candidate
+
+    fun bind(candidate: Candidate) {
+        this.candidate = candidate
+        when (candidate) {
+            is Candidate.Data -> binding.candidateText.text = candidate.label
+            is Candidate.Exit -> {
+                binding.candidateText.text = "X"
+            }
+        }
+    }
+
+    companion object {
+        fun newInstance(
+            parent: ViewGroup,
+            onCandidateClicked: (Candidate.Data) -> Unit,
+            onExitClicked: () -> Unit
+        ): CandidateViewHolder {
+            return CandidateViewHolder(ViewCandidateItemBinding.inflate(LayoutInflater.from(parent.context), parent, false)).apply {
+                binding.root.setOnClickListener {
+                    if (candidate is Candidate.Data) {
+                        onCandidateClicked(candidate as Candidate.Data)
+                    } else {
+                        onExitClicked()
+                    }
+                }
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/knowre/android/kal/myscript/MyScriptPadView.kt b/app/src/main/java/com/knowre/android/kal/myscript/MyScriptPadView.kt
index 7e2ce69..a8638a8 100644
--- a/app/src/main/java/com/knowre/android/kal/myscript/MyScriptPadView.kt
+++ b/app/src/main/java/com/knowre/android/kal/myscript/MyScriptPadView.kt
@@ -2,19 +2,24 @@ package com.knowre.android.kal.myscript
 
 import android.content.Context
 import android.content.res.AssetManager
+import android.content.res.ColorStateList
+import android.content.res.Resources
+import android.graphics.Color
 import android.util.AttributeSet
 import android.util.Log
+import android.util.TypedValue
 import android.view.LayoutInflater
 import android.widget.FrameLayout
+import android.widget.Toast
+import androidx.recyclerview.widget.LinearLayoutManager
+import com.google.android.material.shape.MaterialShapeDrawable
+import com.google.android.material.shape.ShapeAppearanceModel
 import com.knowre.android.kal.databinding.ViewMyscriptPadBinding
-import com.knowre.android.myscript.iink.FolderProvider
 import com.knowre.android.myscript.iink.MyScriptApi
-import com.knowre.android.myscript.iink.MyScriptAssetResource
 import com.knowre.android.myscript.iink.MyScriptInitializer
 import com.knowre.android.myscript.iink.MyScriptInterpretListener
 import com.knowre.android.myscript.iink.ToolFunction
 import com.knowre.android.myscript.iink.ToolType
-import com.knowre.android.myscript.iink.certificate.MyCertificate
 import com.myscript.iink.Editor
 import com.myscript.iink.EditorError
 import kotlinx.coroutines.MainScope
@@ -32,44 +37,61 @@ internal class MyScriptPadView constructor(
 
     private val mainScope = MainScope()
 
-    private lateinit var myscript: MyScriptApi
+    private lateinit var myScript: MyScriptApi
+
+    private val candidateAdapter = CandidateAdapter(
+        onCandidateClicked = { candidate -> },
+        onExitClicked = {}
+    )
 
     init {
-        MyScriptInitializer(
-            certificate = MyCertificate.getBytes(),
-            editorView = binding.myScript.editorView,
-            context = context,
-            folders = FolderProvider(context),
-            assetResource = MyScriptAssetResource(context),
-            scope = mainScope
-        )
-            .setGeneralConfiguration()
-            .setMathConfiguration()
-            .initialize {
-                myscript = it.apply {
-                    listener = object : MyScriptInterpretListener {
-                        override fun onInterpreted(interpreted: String) {
-                            binding.latex.text = interpreted
-                            mainScope.launch {
-                                binding.redo.isEnabled = myscript.canRedo
-                                binding.undo.isEnabled = myscript.canUndo
-                            }
-                        }
-
-                        override fun onError(editor: Editor, blockId: String, error: EditorError, message: String) {
-                            Log.d("MY_SCRIPT_ERROR", "$error with message $message")
-                        }
-                    }
-                }
+        initializeMyScript()
+        initializeRecyclerView()
+        initializeToolsListener()
+    }
+
+    override fun onDetachedFromWindow() {
+        super.onDetachedFromWindow()
+        mainScope.cancel()
+    }
+
+    private fun initializeMyScript() {
+        mainScope.launch {
+            myScript = MyScriptInitializer(
+                myScriptView = binding.myScriptView,
+                context = context,
+                scope = mainScope
+            )
+                .initialize()
+                .apply { addListener(interpretListener) }
+                .apply { isAutoConvertEnabled = false }
+        }
+    }
+
+    private fun initializeRecyclerView() {
+        with(binding.candidate) {
+            adapter = candidateAdapter
+            layoutManager = LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false)
+            background = MaterialShapeDrawable(
+                ShapeAppearanceModel.Builder()
+                    .setAllCornerSizes(8F.dp)
+                    .build()
+            ).apply {
+                tintList = ColorStateList.valueOf(Color.parseColor("#FFFFFF"))
+                strokeWidth = 1F.dp
+                strokeColor = ColorStateList.valueOf(Color.parseColor("#CFD8DC"))
+                elevation = 4F.dp
             }
+        }
+    }
 
+    private fun initializeToolsListener() {
         binding.redo.isEnabled = false
         binding.undo.isEnabled = false
 
-        binding.convert.setOnClickListener { myscript.convert() }
-        binding.deleteAll.setOnClickListener { myscript.eraseAll() }
+        binding.deleteAll.setOnClickListener { myScript.eraseAll() }
         binding.digitOnlyGrammar.setOnClickListener {
-            myscript.loadMathGrammar("n_digit_exp", context.assets.toByteArray("n_digit_exp.res"))
+            myScript.loadMathGrammar("n_digit_exp", context.assets.toByteArray("n_digit_exp.res"))
         }
 
         binding.defaultGrammar.setOnClickListener {
@@ -77,20 +99,22 @@ internal class MyScriptPadView constructor(
         }
 
         binding.red.setOnClickListener {
-            myscript.penColor = 0xFF0000
+            myScript.penColor = 0xFF0000
         }
 
         binding.blue.setOnClickListener {
-            myscript.penColor = 0x0000FF
+            myScript.penColor = 0x0000FF
         }
 
         binding.black.setOnClickListener {
-            myscript.penColor = 0x000000
+            myScript.penColor = 0x000000
         }
 
+        binding.convert.setOnClickListener { myScript.convert() }
+
         binding.penSwitch.setOnCheckedChangeListener { _, isChecked ->
             binding.eraserSwitch.isChecked = false
-            myscript.tool = if (isChecked) {
+            myScript.tool = if (isChecked) {
                 MyScriptApi.Tool(
                     toolType = ToolType.PEN,
                     toolFunction = ToolFunction.DRAWING
@@ -104,32 +128,60 @@ internal class MyScriptPadView constructor(
         }
 
         binding.convertSwitch.setOnCheckedChangeListener { _, isChecked ->
-            myscript.isAutoConvertEnabled = isChecked
+            myScript.isAutoConvertEnabled = isChecked
         }
 
         binding.eraserSwitch.setOnCheckedChangeListener { _, isChecked ->
             val toolType = if (binding.penSwitch.isChecked) ToolType.PEN else ToolType.HAND
             if (isChecked) {
-                myscript.tool = MyScriptApi.Tool(toolType, ToolFunction.ERASING)
+                myScript.tool = MyScriptApi.Tool(toolType, ToolFunction.ERASING)
             } else {
-                myscript.tool = MyScriptApi.Tool(toolType, ToolFunction.DRAWING)
+                myScript.tool = MyScriptApi.Tool(toolType, ToolFunction.DRAWING)
             }
         }
 
         binding.redo.setOnClickListener {
-            myscript.redo()
+            myScript.redo()
         }
 
         binding.undo.setOnClickListener {
-            myscript.undo()
+            myScript.undo()
         }
+
+        binding.candidateSwitch.setOnCheckedChangeListener { _, isChecked -> }
     }
 
-    override fun onDetachedFromWindow() {
-        super.onDetachedFromWindow()
-        mainScope.cancel()
+    private val interpretListener: MyScriptInterpretListener
+        get() = object : MyScriptInterpretListener {
+            override fun onInterpreted(interpreted: String) {
+                binding.latex.text = interpreted
+                binding.redo.isEnabled = myScript.canRedo
+                binding.undo.isEnabled = myScript.canUndo
+            }
+
+            override fun onInterpretError(editor: Editor, blockId: String, error: EditorError, message: String) {
+                Log.d("MY_SCRIPT_ERROR", "$error with message $message")
+            }
+
+            override fun onImportError() {
+                Toast
+                    .makeText(context, "해당 문자로는 변경이 불가능합니다.", Toast.LENGTH_SHORT)
+                    .show()
+            }
+        }
+
+    private fun showNoCandidateAvailable() {
+        Toast
+            .makeText(context, "No candidates available.", Toast.LENGTH_SHORT)
+            .show()
     }
 
     private fun AssetManager.toByteArray(fileName: String) = open(fileName).use { it.readBytes() }
 
+    private val Number.dp: Float
+        get() = TypedValue.applyDimension(
+            TypedValue.COMPLEX_UNIT_DIP,
+            toFloat(),
+            Resources.getSystem().displayMetrics
+        )
 }
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 9fec30d..3c4722d 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -20,15 +20,6 @@
 
     </com.google.android.material.appbar.AppBarLayout>
 
-    <com.google.android.material.floatingactionbutton.FloatingActionButton
-        android:id="@+id/fab"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginBottom="16dp"
-        android:layout_marginEnd="@dimen/fab_margin"
-        android:layout_gravity="bottom|end"
-        app:srcCompat="@android:drawable/ic_dialog_email" />
-
     <include layout="@layout/content_main" />
 
 </androidx.coordinatorlayout.widget.CoordinatorLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/fragment_first.xml b/app/src/main/res/layout/fragment_first.xml
index 5f25d3c..531b331 100644
--- a/app/src/main/res/layout/fragment_first.xml
+++ b/app/src/main/res/layout/fragment_first.xml
@@ -10,31 +10,17 @@
         android:id="@+id/button_first"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginBottom="30dp"
+        android:layout_marginTop="50dp"
         android:text="@string/next"
-        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent" />
 
-
-    <TextView
-        android:id="@+id/textview_first"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="50dp"
-        android:background="#ffff00"
-        android:text="@string/hello_first_fragment"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
-
     <com.knowre.android.kal.myscript.MyScriptPadView
         android:id="@+id/my_script_pad"
         android:layout_width="match_parent"
         android:layout_height="400dp"
-        android:layout_marginTop="100dp"
-        android:background="#44333345"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintBottom_toBottomOf="parent"/>
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/view_candidate_item.xml b/app/src/main/res/layout/view_candidate_item.xml
new file mode 100644
index 0000000..a17adf8
--- /dev/null
+++ b/app/src/main/res/layout/view_candidate_item.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:padding="10dp"
+    tools:parentTag="androidx.constraintlayout.widget.ConstraintLayout">
+
+    <androidx.appcompat.widget.AppCompatTextView
+        android:id="@+id/candidate_text"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textSize="30dp"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintTop_toTopOf="parent"/>
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/view_myscript_pad.xml b/app/src/main/res/layout/view_myscript_pad.xml
index 9610942..d6ac65c 100644
--- a/app/src/main/res/layout/view_myscript_pad.xml
+++ b/app/src/main/res/layout/view_myscript_pad.xml
@@ -1,53 +1,66 @@
 <?xml version="1.0" encoding="utf-8"?>
 <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
     <com.knowre.android.myscript.iink.view.MyScriptView
-        android:id="@+id/my_script"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent" />
+        android:id="@+id/my_script_view"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:background="#11333345"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
 
-    <Button
+    <com.google.android.material.button.MaterialButton
         android:id="@+id/delete_all"
+        style="@style/Widget.MaterialComponents.Button.OutlinedButton"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_margin="10dp"
-        android:text="DELETE ALL"
+        android:text="DELETE_ALL"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
     <Button
         android:id="@+id/convert"
+        style="@style/Widget.MaterialComponents.Button.OutlinedButton"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_margin="10dp"
+        android:layout_marginEnd="10dp"
         android:text="convert"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintEnd_toStartOf="@id/delete_all"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintTop_toTopOf="@id/delete_all" />
+
     <Button
         android:id="@+id/digit_only_grammar"
+        style="@style/Widget.MaterialComponents.Button.OutlinedButton"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_margin="10dp"
+        android:layout_marginEnd="10dp"
         android:text="n_digit_only"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintEnd_toStartOf="@id/convert"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintTop_toTopOf="@id/delete_all" />
+
     <Button
         android:id="@+id/default_grammar"
+        style="@style/Widget.MaterialComponents.Button.OutlinedButton"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_margin="10dp"
+        android:layout_marginEnd="10dp"
         android:text="default"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintEnd_toStartOf="@id/digit_only_grammar"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintTop_toTopOf="@id/delete_all" />
 
     <Button
         android:id="@+id/red"
+        style="@style/Widget.MaterialComponents.Button.OutlinedButton"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_margin="10dp"
@@ -57,6 +70,7 @@
 
     <Button
         android:id="@+id/blue"
+        style="@style/Widget.MaterialComponents.Button.OutlinedButton"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_margin="10dp"
@@ -66,6 +80,7 @@
 
     <Button
         android:id="@+id/black"
+        style="@style/Widget.MaterialComponents.Button.OutlinedButton"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_margin="10dp"
@@ -75,6 +90,7 @@
 
     <Button
         android:id="@+id/redo"
+        style="@style/Widget.MaterialComponents.Button.OutlinedButton"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_margin="10dp"
@@ -84,6 +100,7 @@
 
     <Button
         android:id="@+id/undo"
+        style="@style/Widget.MaterialComponents.Button.OutlinedButton"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_margin="10dp"
@@ -92,16 +109,14 @@
         app:layout_constraintEnd_toStartOf="@id/redo"
         app:layout_constraintTop_toBottomOf="@+id/delete_all" />
 
-    <TextView
+    <androidx.appcompat.widget.AppCompatTextView
         android:id="@+id/latex"
-        android:layout_width="match_parent"
+        android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_margin="10dp"
-        android:gravity="right"
         android:textColor="@color/black"
         android:textSize="20dp"
         app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent" />
 
     <androidx.appcompat.widget.SwitchCompat
@@ -118,11 +133,20 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_margin="10dp"
+        android:checked="false"
         android:text="Convert"
-        android:checked="true"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@+id/eraser_switch" />
 
+    <androidx.appcompat.widget.SwitchCompat
+        android:id="@+id/candidate_switch"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="10dp"
+        android:text="Candidate"
+        app:layout_constraintStart_toEndOf="@+id/pen_switch"
+        app:layout_constraintTop_toTopOf="@+id/pen_switch" />
+
     <androidx.appcompat.widget.SwitchCompat
         android:id="@+id/pen_switch"
         android:layout_width="wrap_content"
@@ -130,6 +154,13 @@
         android:layout_margin="10dp"
         android:text="Pen"
         app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="@id/delete_all" />
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/candidate"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/myscript-iink/UIReferenceImplementation/build.gradle b/myscript-iink/UIReferenceImplementation/build.gradle
index 95c690c..06ee34b 100644
--- a/myscript-iink/UIReferenceImplementation/build.gradle
+++ b/myscript-iink/UIReferenceImplementation/build.gradle
@@ -20,5 +20,5 @@ android {
 dependencies {
     implementation "androidx.appcompat:appcompat:1.5.1"
     implementation "com.google.code.gson:gson:2.10.1"
-    api "com.myscript:iink:2.1.1"
+    api "com.myscript:iink:3.0.2"
 }
diff --git a/myscript-iink/build.gradle b/myscript-iink/build.gradle
index b48df26..4d71eb9 100644
--- a/myscript-iink/build.gradle
+++ b/myscript-iink/build.gradle
@@ -35,11 +35,13 @@ android {
 }
 
 dependencies {
+    implementation project("${getImplementationPrefix(project.parent.name)}:extension-android")
     implementation project("${getImplementationPrefix(project.parent.name)}:extension-standard")
     api project("${getImplementationPrefix(project.parent.name)}:myscript-iink:UIReferenceImplementation")
     implementation 'androidx.core:core-ktx:1.8.0'
     implementation 'androidx.appcompat:appcompat:1.5.1'
     implementation 'com.google.android.material:material:1.7.0'
+    implementation "com.google.code.gson:gson:2.10.1"
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.5'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/ConfigurationExtension.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/ConfigurationExtension.kt
index d839afa..4079de9 100644
--- a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/ConfigurationExtension.kt
+++ b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/ConfigurationExtension.kt
@@ -3,7 +3,9 @@ package com.knowre.android.myscript.iink
 import com.myscript.iink.Configuration
 
 
-internal fun Configuration.ofGeneral(func: GeneralConfiguration.() -> Unit) = GeneralConfiguration(this).func()
+internal fun Configuration.ofGeneral(func: GeneralConfiguration.() -> Unit) =
+    GeneralConfiguration(this).func()
 
-internal fun Configuration.ofMath(func: MathConfiguration.() -> Unit) = MathConfiguration(this).func()
+internal fun Configuration.ofMath(func: MathConfiguration.() -> Unit) =
+    MathConfiguration(this).func()
 
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/EditorExtension.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/EditorExtension.kt
index 7abbb47..4a3a56f 100644
--- a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/EditorExtension.kt
+++ b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/EditorExtension.kt
@@ -1,6 +1,5 @@
 package com.knowre.android.myscript.iink
 
-import android.util.Log
 import com.myscript.iink.ContentPart
 import com.myscript.iink.Editor
 import com.myscript.iink.EditorError
@@ -39,7 +38,6 @@ internal inline fun Editor.addListener(
         }
 
         override fun onError(editor: Editor, blockId: String, error: EditorError, message: String) {
-            Log.d("MY_SCRIPT_ERROR", "$error with message $message")
             onError(editor, blockId, error, message)
         }
 
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/FolderProvider.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/FolderProvider.kt
index b7bfa30..d5b121b 100644
--- a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/FolderProvider.kt
+++ b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/FolderProvider.kt
@@ -4,29 +4,28 @@ import android.content.Context
 import java.io.File
 
 
-class FolderProvider constructor(val context: Context): FolderProviderApi {
+internal class FolderProvider(val context: Context) {
 
-    companion object {
-        private const val ROOT = "/myscript"
-        private const val CONFIGURATION = "/conf"
-        private const val MATH_RESOURCE = "/resources/math"
-        private const val PACKAGE = "/package"
-        private const val CONTENT_PACKAGE = "/tmp"
-    }
-
-    override val rootFolder
+    val rootFolder
         get() = File(context.filesDir, ROOT)
 
-    override val configFolder
+    val configFolder
         get() = File(rootFolder, CONFIGURATION)
 
-    override val mathResourceFolder
+    val mathResourceFolder
         get() = File(rootFolder, MATH_RESOURCE)
 
-    override val packageFolder
+    val packageFolder
         get() = File(rootFolder, PACKAGE)
 
-    override val contentPackageTempFolder
+    val contentPackageTempFolder
         get() =File(rootFolder, CONTENT_PACKAGE)
 
+    companion object {
+        private const val ROOT = "/myscript"
+        private const val CONFIGURATION = "/conf"
+        private const val MATH_RESOURCE = "/resources/math"
+        private const val PACKAGE = "/package"
+        private const val CONTENT_PACKAGE = "/tmp"
+    }
 }
\ No newline at end of file
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/FolderProviderApi.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/FolderProviderApi.kt
deleted file mode 100644
index 1825075..0000000
--- a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/FolderProviderApi.kt
+++ /dev/null
@@ -1,12 +0,0 @@
-package com.knowre.android.myscript.iink
-
-import java.io.File
-
-
-interface FolderProviderApi {
-    val rootFolder: File
-    val configFolder: File
-    val mathResourceFolder: File
-    val packageFolder: File
-    val contentPackageTempFolder: File
-}
\ No newline at end of file
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/GeneralConfiguration.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/GeneralConfiguration.kt
index ea86c5a..7012c8d 100644
--- a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/GeneralConfiguration.kt
+++ b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/GeneralConfiguration.kt
@@ -7,9 +7,8 @@ import kotlin.properties.Delegates
  * https://developer.myscript.com/docs/interactive-ink/2.1/reference/configuration/ 에서 general section 부분의 설정 값을 설정한다.
  * 아래 주석이 없는 동작에 대해서는 위 홈페이지를 참조.
  */
-internal class GeneralConfiguration constructor(
+internal class GeneralConfiguration(
     private val configuration: Configuration
-
 ) {
 
     var configPath by Delegates.observable("") { _, _, new ->
@@ -19,5 +18,4 @@ internal class GeneralConfiguration constructor(
     var contentPackageTempFolder by Delegates.observable("") { _, _, new ->
         configuration.setString("content-package.temp-folder", new)
     }
-
 }
\ No newline at end of file
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MathResourceConfiger.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MathConfiger.kt
similarity index 71%
rename from myscript-iink/src/main/java/com/knowre/android/myscript/iink/MathResourceConfiger.kt
rename to myscript-iink/src/main/java/com/knowre/android/myscript/iink/MathConfiger.kt
index b6ba3dc..e428820 100644
--- a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MathResourceConfiger.kt
+++ b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MathConfiger.kt
@@ -3,9 +3,7 @@ package com.knowre.android.myscript.iink
 import java.io.File
 
 
-const val CONFIG_FILE_NAME = "${MathConfiguration.CONFIG_BUNDLE_NAME_DEFAULT}.conf"
-
-internal class MathResourceConfiger constructor(private val configFolder: File) {
+internal class MathConfiger(private val configFolder: File) {
 
     private val template = { grammarName: String ->
         """
@@ -23,9 +21,12 @@ internal class MathResourceConfiger constructor(private val configFolder: File)
             .trimIndent()
     }
 
-    val write = { grammarName: String ->
+    val grammar = { grammarName: String ->
         File(configFolder, CONFIG_FILE_NAME)
             .writeText(template(grammarName))
     }
 
+    companion object {
+        private const val CONFIG_FILE_NAME = "${MathConfiguration.CONFIG_BUNDLE_NAME_DEFAULT}.conf"
+    }
 }
\ No newline at end of file
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MathConfiguration.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MathConfiguration.kt
index 1aa1ceb..211d5b6 100644
--- a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MathConfiguration.kt
+++ b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MathConfiguration.kt
@@ -10,12 +10,7 @@ import kotlin.properties.Delegates
  * https://developer.myscript.com/docs/interactive-ink/2.1/reference/configuration/ 에서 math section 부분의 설정 값을 설정한다.
  * 아래 주석이 없는 동작에 대해서는 위 홈페이지를 참조.
  */
-internal class MathConfiguration constructor(private val configuration: Configuration) {
-
-    companion object {
-        const val CONFIG_BUNDLE_NAME_DEFAULT = "math"
-        const val CONFIG_NAME_DEFAULT = "standard"
-    }
+internal class MathConfiguration(private val configuration: Configuration) {
 
     var mathConfigurationBundle by Delegates.observable(CONFIG_BUNDLE_NAME_DEFAULT) { _, _, new ->
         configuration.setString("math.configuration.bundle", new)
@@ -48,4 +43,12 @@ internal class MathConfiguration constructor(private val configuration: Configur
         configuration.setBoolean("math.convert.animate", new)
     }
 
+    var candidateCount by Delegates.observable(2) { _, _, new ->
+        configuration.setString("math.configuration.script", "SetMathSymbolCandidateCount $new")
+    }
+
+    companion object {
+        const val CONFIG_BUNDLE_NAME_DEFAULT = "math"
+        const val CONFIG_NAME_DEFAULT = "standard"
+    }
 }
\ No newline at end of file
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MathGrammarLoader.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MathGrammarLoader.kt
index db4bd12..88c8e74 100644
--- a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MathGrammarLoader.kt
+++ b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MathGrammarLoader.kt
@@ -4,21 +4,17 @@ import com.knowre.android.myscript.iink.MyScriptAssetResource.Companion.DEFAULT_
 import java.io.File
 
 
-internal class MathGrammarLoader constructor(
+internal class MathGrammarLoader(
     private val mathResourceFolder: File,
-    private val mathResourceConfiger: MathResourceConfiger
-
+    private val mathConfiger: MathConfiger
 ) {
 
     fun load(grammarName: String, byteArray: ByteArray) {
         runCatching {
-            byteArray.run {
-                File(mathResourceFolder, grammarName)
-                    .apply { writeBytes(this@run) }
-            }
+            File(mathResourceFolder, grammarName)
+                .apply { writeBytes(byteArray) }
         }
-            .onSuccess { it.let { mathResourceConfiger.write(it.name) } }
-            .onFailure { mathResourceConfiger.write(DEFAULT_GRAMMAR_NAME) }
+            .onSuccess { it.let { mathConfiger.grammar(it.name) } }
+            .onFailure { mathConfiger.grammar(DEFAULT_GRAMMAR_NAME) }
     }
-
 }
\ No newline at end of file
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScript.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScript.kt
index 16d8acf..c31bbbc 100644
--- a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScript.kt
+++ b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScript.kt
@@ -1,13 +1,17 @@
 package com.knowre.android.myscript.iink
 
+import com.google.gson.GsonBuilder
+import com.knowre.android.myscript.iink.jiix.Jiix
 import com.myscript.iink.ContentPackage
 import com.myscript.iink.ContentPart
 import com.myscript.iink.Editor
 import com.myscript.iink.Engine
 import com.myscript.iink.IEditorListener
+import com.myscript.iink.MimeType
 import com.myscript.iink.PointerTool
 import com.myscript.iink.uireferenceimplementation.InputController
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
@@ -15,27 +19,6 @@ import java.io.File
 import kotlin.properties.Delegates
 
 
-/**
- * force pen 으로 설정해야 pen 이든 touch 이든지 상관없이 drawing/erasing 을 할 수 있게 된다. force pen 이라고해서 pen 으로만 drawing/erasing 한다라고 생각하면 안된다.
- * force pen 은 drawing/erasing 모드 force touch 는 drawing 이 아니라 gesture detecting 모드라고 생각하면 된다.
- * 참고 : pen 으로 drawing 할지 touch 로 drawing 할지는 editor.toolController.setToolForType(..) 로 설정한다.
- */
-private const val DRAWING_OR_ERASING_ONLY = InputController.INPUT_MODE_FORCE_PEN
-
-/**
- * AUTO 일 경우 pen 으로 터치할 경우 force pen(drawing mode) 이되고 손으로 터치 할 경우 force touch(gesture detecting mode) 가 된다.
- * (참고 : 현재 앱에서는 이 상태를 사용하지 않지만. 기능 자체는 넣어 두었다.)
- */
-private const val DRAWING_OR_ERASING_BY_PEN_BUT_GESTURE_BY_HAND = InputController.INPUT_MODE_AUTO
-
-/**
- * [ContentPart] 를 어떤 Type 의 마이스크립트 기능으로 사용할지를 나타낸다. 이는 변경되면 안된다.
- * 미리 정의된 Text, Math, Drawing, Diagram, Raw Content, Text Document 중 하나여야하며 우리 앱에서는 Math 만 사용한다.
- */
-private const val MATH_PART_NAME = "Math"
-
-private const val CONVERT_STANDBY_DELAY: Long = 200
-
 internal class MyScript(
     packageFolder: File,
     private val rootFolder: File,
@@ -44,11 +27,8 @@ internal class MyScript(
     private val editor: Editor,
     private val mathGrammarLoader: MathGrammarLoader,
     private val scope: CoroutineScope
-
 ) : MyScriptApi {
 
-    override var listener: MyScriptInterpretListener? = null
-
     override var isAutoConvertEnabled: Boolean = true
 
     override var theme: String by Delegates.observable("") { _, _, new ->
@@ -82,6 +62,9 @@ internal class MyScript(
     override val currentLatex: String
         get() = editor.latex()
 
+    override val jiixJson: String
+        get() = editor.export_(null, MimeType.JIIX)
+
     override val isIdle: Boolean
         get() = editor.isIdle
 
@@ -91,6 +74,8 @@ internal class MyScript(
     override val canRedo: Boolean
         get() = editor.canRedo()
 
+    private val strokeInterpretListeners = mutableListOf<MyScriptInterpretListener>()
+
     private var contentPackage: ContentPackage = engine.createPackage(packageFolder)
     private var contentPart: ContentPart = contentPackage.createPart(MATH_PART_NAME)
         set(value) {
@@ -103,7 +88,7 @@ internal class MyScript(
 
     private var lastInterpretedLaTex: String = ""
 
-    private var convertStandby: Job? = null
+    private var convertingJob: Job? = null
 
     private val shouldAutoConvert
         get() = isAutoConvertEnabled && !shouldPreventAutoConvertTemporarily
@@ -115,9 +100,34 @@ internal class MyScript(
      */
     private var shouldPreventAutoConvertTemporarily: Boolean = false
 
+    private val gson = GsonBuilder().create()
+
     init {
         with(editor) {
-            addEditorListener()
+            addListener(
+                contentChanged = { _, _ ->
+                    /**
+                     * 스트록이 변화해 [ContentChanged] 가 불렸는데, 현재의 latex 가 마지막으로 인식된 latex 와 값이 같으면, converting 작업을 따로 하지 않아야 한다.
+                     * 원래는 이와 같은 처리가 없어도 보통 문제가 없으나, 마이스크립트가 인식하기 애매한 스트록을 인식 시킬 경우,
+                     * (예, "2 > 3" 처럼 좌, 우 항 모두 존재하는게 아니라 "> 3" 과 같이 우항만 존재하는 스트록)
+                     * [ContentChanged] 가 계속해서 여러번 불리거나, 컨버팅된 글자에 이상현상이 생기는 등 사이드 이펙트가 발생한다.
+                     */
+                    editor.latex().also {
+                        if (lastInterpretedLaTex != it) {
+                            lastInterpretedLaTex = it
+                            scope.launch(Dispatchers.Main) {
+                                onInterpreted(it)
+                            }
+                            convertIfNeeded()
+                        }
+                    }
+                },
+                onError = { editor, blockId, error, message ->
+                    strokeInterpretListeners.forEach {
+                        it.onInterpretError(editor, blockId, error, message)
+                    }
+                }
+            )
             part = contentPart
         }
 
@@ -129,6 +139,18 @@ internal class MyScript(
         }
     }
 
+    override fun addListener(listener: MyScriptInterpretListener) {
+        strokeInterpretListeners.add(listener)
+    }
+
+    override fun removeListener(listener: MyScriptInterpretListener) {
+        strokeInterpretListeners.remove(listener)
+    }
+
+    override fun getJiix(): Jiix =
+        editor.export_(null, MimeType.JIIX)
+            .run { gson.fromJson(this, Jiix::class.java) }
+
     override fun undo() {
         shouldPreventAutoConvertTemporarily = true
         editor.undo()
@@ -149,15 +171,29 @@ internal class MyScript(
             editor.clear()
         } else {
             contentPart = contentPackage.createPart(MATH_PART_NAME)
-            listener?.onInterpreted("")
+            onInterpreted("")
         }
     }
 
     override fun convert() {
-        convertStandby?.cancel()
+        convertingJob?.cancel()
         editor.let { it.convert(null, it.getSupportedTargetConversionStates(null)[0]) }
     }
 
+    override fun import(jiix: Jiix) {
+        import(gson.toJson(jiix))
+    }
+
+    override fun import(json: String) {
+        try {
+            editor.import_(MimeType.JIIX, json, null)
+        } catch (e: Exception) {
+            strokeInterpretListeners.forEach {
+                it.onImportError()
+            }
+        }
+    }
+
     /**
      * Math grammar 를 [byteArray] 로 변경한 후 현재 part 를 닫고 새로운 part 를 만들어 할당한다.
      *
@@ -185,39 +221,50 @@ internal class MyScript(
         editor.close()
         engine.close()
         rootFolder.deleteRecursively()
-        convertStandby?.cancel()
-    }
+        convertingJob?.cancel()
 
-    private fun Editor.addEditorListener() {
-        addListener(
-            contentChanged = contentChangedListener(),
-            onError = onEditorError()
-        )
     }
 
-    private fun contentChangedListener(): ContentChanged = { editor, _ ->
-        val latex = editor.latex()
+    private fun onInterpreted(latex: String) {
+        strokeInterpretListeners.forEach {
+            it.onInterpreted(latex)
+        }
+    }
 
-        /**
-         * 스크록이 변화하여 [ContentChanged] 가 불렸는데, 현재의 latex 가 마지막으로 인식된 latex 와 값이 같으면, converting 작업을 따로 하지 않아야한다.
-         * 원래는 이와 같은 처리가 없어도 보통 문제가 없으나, 마이스크립트가 인식하기 애매한 스트록을 인식 시킬 경우,
-         * (예, "2 > 3" 처럼 좌, 우 항 모두 존재하는게 아니라 "> 3" 과 같이 우항만 존재하는 스트록)
-         * [ContentChanged] 가 계속해서 여러번 불리거나, 컨버팅된 글자에 이상현상이 생기는 등 사이드 이펙트가 발생한다.
-         */
-        if (lastInterpretedLaTex != latex) {
-            lastInterpretedLaTex = latex
-            listener?.onInterpreted(latex)
-
-            convertStandby?.cancel()
-            if (shouldAutoConvert) {
-                convertStandby = scope.launch {
-                    delay(CONVERT_STANDBY_DELAY)
-                    convert()
-                }
+    private fun convertIfNeeded() {
+        convertingJob?.cancel()
+        if (shouldAutoConvert) {
+            convertingJob = scope.launch {
+                delay(CONVERT_STANDBY_DELAY)
+                convert()
             }
         }
     }
 
-    private fun onEditorError(): OnError = { editor, blockId, error, message -> listener?.onError(editor, blockId, error, message) }
+    companion object {
+        /**
+         * force pen 으로 설정해야 pen 이든 touch 이든지 상관없이 drawing/erasing 을 할 수 있게 된다. force pen 이라고해서 pen 으로만 drawing/erasing 한다라고 생각하면 안된다.
+         * force pen 은 drawing/erasing 모드 force touch 는 drawing 이 아니라 gesture detecting 모드라고 생각하면 된다.
+         * 참고 : pen 으로 drawing 할지 touch 로 drawing 할지는 editor.toolController.setToolForType(..) 로 설정한다.
+         */
+        private const val DRAWING_OR_ERASING_ONLY = InputController.INPUT_MODE_FORCE_PEN
 
+        /**
+         * AUTO 일 경우 pen 으로 터치할 경우 force pen(drawing mode) 이되고 손으로 터치 할 경우 force touch(gesture detecting mode) 가 된다.
+         * (참고 : 현재 앱에서는 이 상태를 사용하지 않지만. 기능 자체는 넣어 두었다.)
+         */
+        private const val DRAWING_OR_ERASING_BY_PEN_BUT_GESTURE_BY_HAND = InputController.INPUT_MODE_AUTO
+
+        /**
+         * [ContentPart] 를 어떤 Type 의 마이스크립트 기능으로 사용할지를 나타낸다. 이는 변경되면 안된다.
+         * 미리 정의된 Text, Math, Drawing, Diagram, Raw Content, Text Document 중 하나여야하며 우리 앱에서는 Math 만 사용한다.
+         */
+        private const val MATH_PART_NAME = "Math"
+
+        /**
+         * 컨버팅 딜레이를 주지 않으면 (, {, [ 같은 괄호를 작성했을 때 1, c, < 와 같은 잘못된 문자로 바로 컨버팅되기 때문에 일정 딜레이를 준다.
+         * (위 괄호들은 양쪽 쌍으로 작성한 후 컨버팅해야 제대로 인식된다.)
+         */
+        private const val CONVERT_STANDBY_DELAY: Long = 200
+    }
 }
\ No newline at end of file
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScriptApi.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScriptApi.kt
index b40639b..a0a4ad5 100644
--- a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScriptApi.kt
+++ b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScriptApi.kt
@@ -1,26 +1,34 @@
 package com.knowre.android.myscript.iink
 
+import com.knowre.android.myscript.iink.jiix.Jiix
+
 
 interface MyScriptApi {
     data class Tool(val toolType: ToolType, val toolFunction: ToolFunction) {
+
         companion object {
             val DEFAULT = Tool(ToolType.HAND, ToolFunction.DRAWING)
         }
     }
 
-    var listener: MyScriptInterpretListener?
     var isAutoConvertEnabled: Boolean
     var theme: String
     var tool: Tool
     var penColor: Int
+    val jiixJson: String
     val currentLatex: String
     val isIdle: Boolean
     val canUndo: Boolean
     val canRedo: Boolean
+    fun addListener(listener: MyScriptInterpretListener)
+    fun removeListener(listener: MyScriptInterpretListener)
+    fun getJiix(): Jiix
     fun undo()
     fun redo()
     fun eraseAll(keepRedoUndoStack: Boolean = false)
     fun convert()
+    fun import(jiix: Jiix)
+    fun import(json: String)
     fun loadMathGrammar(grammarName: String, byteArray: ByteArray)
     fun close()
 }
\ No newline at end of file
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScriptAssetResource.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScriptAssetResource.kt
index a6926de..160bf28 100644
--- a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScriptAssetResource.kt
+++ b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScriptAssetResource.kt
@@ -4,14 +4,7 @@ import android.content.Context
 import android.content.res.AssetManager
 
 
-class MyScriptAssetResource constructor(context: Context) {
-
-    companion object {
-        const val MATH_AK_RESOURCE_NAME = "math-ak.res"
-        const val DEFAULT_GRAMMAR_NAME = "math-grm-standard.res"
-        private const val RESOURCE_FOLDER = "resources"
-        private const val MATH_FOLDER = "math"
-    }
+class MyScriptAssetResource(context: Context) {
 
     val acknowledgeByte by lazy {
         context.assets
@@ -25,4 +18,10 @@ class MyScriptAssetResource constructor(context: Context) {
 
     private fun AssetManager.toByteArray(fileName: String) = open(fileName).use { it.readBytes() }
 
+    companion object {
+        const val MATH_AK_RESOURCE_NAME = "math-ak.res"
+        const val DEFAULT_GRAMMAR_NAME = "math-grm-standard.res"
+        private const val RESOURCE_FOLDER = "resources"
+        private const val MATH_FOLDER = "math"
+    }
 }
\ No newline at end of file
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScriptExtension.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScriptExtension.kt
new file mode 100644
index 0000000..18db602
--- /dev/null
+++ b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScriptExtension.kt
@@ -0,0 +1,25 @@
+package com.knowre.android.myscript.iink
+
+import com.myscript.iink.Editor
+import com.myscript.iink.EditorError
+
+
+fun MyScriptApi.addListener(
+    onInterpreted: (interpreted: String) -> Unit = { _ -> },
+    onInterpretError: (editor: Editor, blockId: String, error: EditorError, message: String) -> Unit = { _, _, _, _ -> },
+    onImportError: () -> Unit =  {  }
+) {
+    addListener(object : MyScriptInterpretListener {
+        override fun onInterpreted(interpreted: String) {
+            onInterpreted(interpreted)
+        }
+
+        override fun onInterpretError(editor: Editor, blockId: String, error: EditorError, message: String) {
+            onInterpretError(editor, blockId, error, message)
+        }
+
+        override fun onImportError() {
+            onImportError()
+        }
+    })
+}
\ No newline at end of file
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScriptInitializer.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScriptInitializer.kt
index ae022a4..8dd48d0 100644
--- a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScriptInitializer.kt
+++ b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScriptInitializer.kt
@@ -4,16 +4,16 @@ import android.content.Context
 import android.content.res.Resources
 import android.graphics.Typeface
 import androidx.core.content.res.ResourcesCompat
+import com.knowre.android.myscript.iink.certificate.MyCertificate
+import com.knowre.android.myscript.iink.view.MyScriptView
 import com.myscript.iink.Configuration
 import com.myscript.iink.Editor
 import com.myscript.iink.Engine
 import com.myscript.iink.uireferenceimplementation.EditorBinding
-import com.myscript.iink.uireferenceimplementation.EditorView
 import com.myscript.iink.uireferenceimplementation.FontUtils
 import com.myscript.iink.uireferenceimplementation.InputController
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import java.io.ByteArrayOutputStream
 import java.io.File
@@ -24,139 +24,121 @@ import java.nio.charset.StandardCharsets
  * @see [MathConfiguration.sessionTimeMillis]
  */
 private const val INTERPRET_SESSION_TIME_MILLIS: Long = 100
+private const val CANDIDATE_COUNT: Int = 2
 
 class MyScriptInitializer(
-    certificate: ByteArray,
-    editorView: EditorView,
+    private val myScriptView: MyScriptView,
     private val context: Context,
-    private val folders: FolderProviderApi,
-    private val assetResource: MyScriptAssetResource,
     private val scope: CoroutineScope
-
 ) {
 
     private val engine by lazy {
-        Engine.create(certificate).apply { deleteUsedPackage(folders.packageFolder) }
+        Engine.create(MyCertificate.getBytes()).apply {
+            deleteUsedPackage(folders.packageFolder)
+        }
     }
 
     private val editorData by lazy {
         EditorBinding(engine, context.provideTypefaces())
-            .openEditor(editorView)
+            .openEditor(myScriptView.editorView)
     }
 
     private val editor: Editor by lazy { editorData.editor!! }
 
+    private val folders = FolderProvider(context)
+
     private val inputController: InputController by lazy { editorData.inputController!! }
 
-    private val mathResourceConfiger = MathResourceConfiger(folders.configFolder)
+    private val mathConfiger = MathConfiger(folders.configFolder)
 
     private val mathGrammarLoader = MathGrammarLoader(
         mathResourceFolder = folders.mathResourceFolder,
-        mathResourceConfiger = mathResourceConfiger
+        mathConfiger = mathConfiger
     )
 
-    private var setGeneralConfiguration: (Configuration) -> Unit = { _ -> }
-    private var setMathConfiguration: (Configuration) -> Unit = { _ -> }
-
-    fun setGeneralConfiguration(
-        configPath: String = folders.configFolder.path,
-        contentPackageTempFolder: String = folders.contentPackageTempFolder.path
-    ): MyScriptInitializer {
-        setGeneralConfiguration = { configuration ->
-            configuration
-                .ofGeneral {
-                    this.configPath = configPath
-                    this.contentPackageTempFolder = contentPackageTempFolder
-                }
+    private val assetResource = MyScriptAssetResource(context)
+
+    suspend fun initialize(): MyScriptApi {
+        withContext(Dispatchers.Default) {
+            processResourceAndFolder()
+            engine.configuration.generalConfig()
         }
-        return this
-    }
 
-    fun setMathConfiguration(
-        isMathSolverEnabled: Boolean = false,
-        isConvertAnimationEnabled: Boolean = true,
-        sessionTimeMillis: Long = INTERPRET_SESSION_TIME_MILLIS
-    ): MyScriptInitializer {
-        setMathConfiguration = { configuration ->
-            configuration
-                .ofMath {
-                    this.mathConfigurationBundle = MathConfiguration.CONFIG_BUNDLE_NAME_DEFAULT
-                    this.mathConfigurationName = MathConfiguration.CONFIG_NAME_DEFAULT
-                    this.isMathSolverEnabled = isMathSolverEnabled
-                    this.isConvertAnimationEnabled = isConvertAnimationEnabled
-                    this.sessionTimeMillis = sessionTimeMillis
-                }
+        return withContext(Dispatchers.Main) {
+            editor.configuration.mathConfig()
+            MyScript(
+                engine = engine,
+                packageFolder = folders.packageFolder,
+                rootFolder = folders.rootFolder,
+                editor = editor,
+                inputController = inputController,
+                mathGrammarLoader = mathGrammarLoader,
+                scope = scope
+            )
+                .apply { theme = context.resources.theme() }
         }
-        return this
     }
 
-    fun initialize(onComplete: (MyScriptApi) -> Unit) {
-        scope.launch(Dispatchers.Default) {
-            preProcessing()
-            setGeneralConfiguration(engine.configuration)
-
-            withContext(Dispatchers.Main) {
-                setMathConfiguration(editorData.editor!!.configuration)
-
-                onComplete(
-                    MyScript(
-                        engine = engine,
-                        packageFolder = folders.packageFolder,
-                        rootFolder = folders.rootFolder,
-                        editor = editor,
-                        inputController = inputController,
-                        mathGrammarLoader = mathGrammarLoader,
-                        scope = scope
-                    )
-                        .apply { theme = context.resources.theme() }
-                )
-            }
+    private fun processResourceAndFolder() {
+        with (folders) {
+            rootFolder.deleteRecursively()
+            configFolder.mkdirs()
+            mathResourceFolder.mkdirs()
         }
+
+        /** Grammar 를 로드 해줘야 math.conf 파일이 생성되기 때문에 초기화 단계에서 선제적으로 이 작업을 수행한다. */
+        mathGrammarLoader.load(
+            grammarName = MyScriptAssetResource.DEFAULT_GRAMMAR_NAME,
+            byteArray = assetResource.defaultGrammarByte
+        )
+
+        File(folders.mathResourceFolder, MyScriptAssetResource.MATH_AK_RESOURCE_NAME)
+            .writeBytes(assetResource.acknowledgeByte)
     }
 
-    private fun preProcessing() {
-        folders.rootFolder.deleteRecursively()
-        folders.configFolder.mkdirs()
-        folders.mathResourceFolder.mkdirs()
-        /**
-         * 그래머를 로드 해줘야 math.conf 파일이 생성되기 때문에 초기화 단계에서 선제적으로 이 작업을 수행한다.
-         */
-        mathGrammarLoader.load(MyScriptAssetResource.DEFAULT_GRAMMAR_NAME, assetResource.defaultGrammarByte)
-
-        with(assetResource) {
-            defaultGrammarByte
-                .also { File(folders.mathResourceFolder, MyScriptAssetResource.DEFAULT_GRAMMAR_NAME).writeBytes(it) }
-            acknowledgeByte
-                .also { File(folders.mathResourceFolder, MyScriptAssetResource.MATH_AK_RESOURCE_NAME).writeBytes(it) }
+    private fun Configuration.generalConfig() {
+        ofGeneral {
+            this.configPath = folders.configFolder.path
+            this.contentPackageTempFolder = folders.contentPackageTempFolder.path
         }
     }
 
-    private fun Resources.theme(): String {
-        return openRawResource(R.raw.theme).use { input ->
-            ByteArrayOutputStream().use { output ->
-                input.copyTo(output)
-                output.toString(StandardCharsets.UTF_8.name())
-            }
+    private fun Configuration.mathConfig() {
+        ofMath {
+            this.mathConfigurationBundle = MathConfiguration.CONFIG_BUNDLE_NAME_DEFAULT
+            this.mathConfigurationName = MathConfiguration.CONFIG_NAME_DEFAULT
+            this.isMathSolverEnabled = false
+            this.isConvertAnimationEnabled = true
+            this.sessionTimeMillis = INTERPRET_SESSION_TIME_MILLIS
+            this.candidateCount = CANDIDATE_COUNT
         }
     }
+}
 
-    private fun Context.provideTypefaces(): Map<String, Typeface> {
-        val typefaces = FontUtils.loadFontsFromAssets(assets) ?: mutableMapOf()
-        ResourcesCompat.getFont(this, R.font.symbola)?.let {
-            typefaces["SYMBOLA"] = it
+private fun Resources.theme(): String {
+    return openRawResource(R.raw.theme).use { input ->
+        ByteArrayOutputStream().use { output ->
+            input.copyTo(output)
+            output.toString(StandardCharsets.UTF_8.name())
         }
-        return typefaces
     }
+}
 
-    private fun Engine.deleteUsedPackage(packageFolder: File) {
-        runCatching {
-            with(packageFolder) {
-                openPackage(this)
-                    .takeIf { !it.isClosed }
-                    ?.close()
-                deletePackage(this)
-            }
+private fun Context.provideTypefaces(): Map<String, Typeface> {
+    val typefaces = FontUtils.loadFontsFromAssets(assets) ?: mutableMapOf()
+    ResourcesCompat.getFont(this, R.font.symbola)?.let {
+        typefaces["SYMBOLA"] = it
+    }
+    return typefaces
+}
+
+private fun Engine.deleteUsedPackage(packageFolder: File) {
+    runCatching {
+        with(packageFolder) {
+            openPackage(this)
+                .takeIf { !it.isClosed }
+                ?.close()
+            deletePackage(this)
         }
     }
-
 }
\ No newline at end of file
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScriptInterpretListener.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScriptInterpretListener.kt
index 3a4efd3..816ac4a 100644
--- a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScriptInterpretListener.kt
+++ b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/MyScriptInterpretListener.kt
@@ -11,5 +11,6 @@ interface MyScriptInterpretListener {
      * 참고 : 해당 함수의 쓰레드는 Main 쓰레드가 아님.
      */
     fun onInterpreted(interpreted: String)
-    fun onError(editor: Editor, blockId: String, error: EditorError, message: String)
+    fun onInterpretError(editor: Editor, blockId: String, error: EditorError, message: String)
+    fun onImportError()
 }
\ No newline at end of file
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/jiix/BoundingBox.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/jiix/BoundingBox.kt
new file mode 100644
index 0000000..30f5753
--- /dev/null
+++ b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/jiix/BoundingBox.kt
@@ -0,0 +1,9 @@
+package com.knowre.android.myscript.iink.jiix
+
+
+data class BoundingBox(
+    val x: Float,
+    val y: Float,
+    val width: Float,
+    val height: Float
+)
\ No newline at end of file
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/jiix/Expression.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/jiix/Expression.kt
new file mode 100644
index 0000000..b290fd3
--- /dev/null
+++ b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/jiix/Expression.kt
@@ -0,0 +1,28 @@
+package com.knowre.android.myscript.iink.jiix
+
+import com.google.gson.annotations.SerializedName
+
+
+data class Expression(
+    val id: String?,
+    val type: String,
+    val items: List<Item>?,
+    @SerializedName("open symbol")
+    val openSymbol: String?,
+    @SerializedName("close symbol")
+    val closeSymbol: String?,
+    @SerializedName("bounding-box")
+    val boundingBox: BoundingBox,
+    val symbols: List<Symbol>?,
+    val operands: List<Expression>?
+)
+
+internal fun Expression.changeItem(newItem: Item): Expression =
+    this.copy(
+        items = items?.map { item ->
+            if (item.id == newItem.id) newItem else item
+        },
+        operands = operands?.map { operand ->
+            operand.changeItem(newItem)
+        }
+    )
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/jiix/Item.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/jiix/Item.kt
new file mode 100644
index 0000000..56dbd23
--- /dev/null
+++ b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/jiix/Item.kt
@@ -0,0 +1,24 @@
+package com.knowre.android.myscript.iink.jiix
+
+import com.google.gson.annotations.SerializedName
+
+
+data class Item(
+    val id: String,
+    val type: String,
+    val timestamp: String,
+    val label: String,
+    @SerializedName("bounding-box")
+    val box: BoundingBox?
+) {
+
+    val boundingBox: BoundingBox
+        get() = box!!
+
+    val isValid: Boolean
+        get() = box != null
+}
+
+fun Item.changeLabel(label: String): Item {
+    return copy(label = label)
+}
\ No newline at end of file
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/jiix/Jiix.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/jiix/Jiix.kt
new file mode 100644
index 0000000..5d89aab
--- /dev/null
+++ b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/jiix/Jiix.kt
@@ -0,0 +1,32 @@
+package com.knowre.android.myscript.iink.jiix
+
+import com.google.gson.annotations.SerializedName
+
+
+data class Jiix(
+    val id: String,
+    val type: String,
+    val items: List<Item>?,
+    val expressions: List<Expression>?,
+    @SerializedName("bounding-box")
+    val boundingBox: BoundingBox?,
+    val version: String
+)
+
+fun Jiix.isValid() =
+    !expressions.isNullOrEmpty() &&
+        expressions.all { it.id != null } &&
+        getAllItems().all { it.isValid }
+
+fun Jiix.changeItem(itemId: String, func: Item.() -> Item) =
+    changeItem(firstItemOf(itemId).func())
+
+internal fun Jiix.changeItem(newItem: Item) =
+    this.copy(
+        items = items?.map { item ->
+            if (item.id == newItem.id) newItem else item
+        },
+        expressions = expressions?.map { expression ->
+            expression.changeItem(newItem)
+        }
+    )
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/jiix/JiixExtension.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/jiix/JiixExtension.kt
new file mode 100644
index 0000000..4f4a7fc
--- /dev/null
+++ b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/jiix/JiixExtension.kt
@@ -0,0 +1,102 @@
+package com.knowre.android.myscript.iink.jiix
+
+import android.content.Context
+import android.graphics.RectF
+import java.util.Collections
+
+
+//region Jiix
+internal fun Jiix.getAllExpressions(): List<Expression> {
+    fun List<Expression>.flatten(): List<Expression> =
+        this + this.flatMap { it.operands?.flatten() ?: Collections.emptyList() }
+
+    return this.expressions?.flatten() ?: Collections.emptyList()
+}
+
+fun Jiix.getCandidates(item: Item): List<String> {
+    val iinkCandidates = findExpressionMatches(item.boundingBox)
+        ?.getCandidates(item.label)
+        ?: listOf()
+
+    val preDefinedCandidates = preDefinedCandidateInfos
+        .find { it.label == item.label }
+        ?.candidates ?: listOf()
+
+    val excludeCandidates = preDefinedCandidateInfos.flatMap { it.excludes }
+
+    return (preDefinedCandidates + iinkCandidates)
+        .minus(excludeCandidates.toSet())
+        .distinct()
+}
+
+internal fun Jiix.getAllSymbols() =
+    getAllExpressions()
+        .flatMap {
+            it.symbols ?: Collections.emptyList()
+        }
+
+internal fun Jiix.getAllItems() =
+    (items ?: Collections.emptyList()) +
+        getAllExpressions()
+            .flatMap { it.items ?: Collections.emptyList() }
+
+fun Jiix.firstItemOf(id: String) =
+    getAllItems().first { it.id == id }
+
+fun Jiix.findAllCollidingItems(
+    context: Context,
+    touchDownX: Float, touchDownY: Float
+) = getAllItems()
+    .filter { it.isInclude(context, touchDownX, touchDownY) }
+
+internal fun Jiix.findExpressionMatches(boundingBox: BoundingBox) =
+    getAllExpressions()
+        .filter { exp ->
+            exp.items
+                ?.any { it.boundingBox == boundingBox }
+                ?: false
+        }
+        .find { it.symbols != null }
+//endregion
+
+//region Expression
+internal fun Expression.getCandidates(label: String) =
+    (symbols
+        ?.find { label == it.symbol }
+        ?.candidates
+        ?: listOf())
+//endregion
+
+//region BoundingBox
+internal fun BoundingBox.isInclude(
+    context: Context,
+    x: Float, y: Float
+) = transformToRectF(context).contains(x, y)
+
+
+fun BoundingBox.transformToRectF(context: Context) = RectF(
+    mmToPx(context, x - 1F),
+    mmToPx(context, y - 1F),
+    mmToPx(context, x + width + 1F),
+    mmToPx(context, y + height + 1F),
+)
+//endregion
+
+//region Item
+internal fun Item.isInclude(
+    context: Context,
+    x: Float, y: Float
+) = boundingBox.isInclude(context, x, y)
+//endregion
+
+//region mm <-> px
+internal fun mmToPx(context: Context, mm: Float): Float {
+    val metrics = context.resources.displayMetrics
+    return mm / 25.4f * metrics.xdpi
+}
+
+internal fun mmToDp(context: Context, mm: Float): Float {
+    val metrics = context.resources.displayMetrics
+    return mm / 25.4f * (metrics.xdpi / 160f)
+}
+//endregion
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/jiix/PredefinedCandidates.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/jiix/PredefinedCandidates.kt
new file mode 100644
index 0000000..14e90f8
--- /dev/null
+++ b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/jiix/PredefinedCandidates.kt
@@ -0,0 +1,105 @@
+package com.knowre.android.myscript.iink.jiix
+
+
+class PreDefinedCandidate(
+    val label: String,
+    val candidates: List<String>,
+    val excludes: List<String>
+)
+
+val preDefinedCandidateInfos = listOf(
+    PreDefinedCandidate("0", listOf("O", "0", "o", "·", "."), listOf("∘", "∫",)),
+    PreDefinedCandidate("1", listOf("1", "|", "I", "l", "i", "t", "(", "+"), listOf("ι")),
+    PreDefinedCandidate("2", listOf("2", "z", "Z", "1", "=", "3", "r", "a"), listOf()),
+    PreDefinedCandidate("3", listOf("3", "}", "s", "1", "2", "z", "5"), listOf("ζ")),
+    PreDefinedCandidate("4", listOf("4", "q", "9", "y", "a", "g", "cl"), listOf("cl")),
+    PreDefinedCandidate("5", listOf("5", "s", "E", "J", "[", "F", "f", "S"), listOf("tan",  "ζ")),
+    PreDefinedCandidate("6", listOf("6", "b", "f", "t", "G", "8", "(", "L"), listOf()),
+    PreDefinedCandidate("7", listOf("7", "T", "2", "I", "1", "r"), listOf("τ","ζ")),
+    PreDefinedCandidate("8", listOf("8", "g", "f", "s", "S", "&", "G", "5"), listOf("δ", "sin")),
+    PreDefinedCandidate("9", listOf("9", "q", "a", "g", "G", "4"), listOf("ℚ", "cl")),
+
+    PreDefinedCandidate("a", listOf("a", "α", "G", "A", "q", "d", "o", "n"), listOf("∝", "cl")),
+    PreDefinedCandidate("b", listOf("b", "h", "6", "k"), listOf("ha", "tan")),
+    PreDefinedCandidate("c", listOf("c", "C", "a", "<", "2", "(", "o"), listOf("⊂", "∠")),
+    PreDefinedCandidate("d", listOf("d", "h", "k", "a", "α", "2", "t", "x"), listOf("dx", "λ")),
+    PreDefinedCandidate("e", listOf("e", "c", "C", "l", "2", "r", "E", "a"), listOf()),
+    PreDefinedCandidate("f", listOf("f", "t", "+", "F", "1", "l"), listOf()),
+    PreDefinedCandidate("y", listOf("g", "y", "t", "q", "8", "f", "z", "2", "J", "r"), listOf("sin")),
+    PreDefinedCandidate("h", listOf("h", "k", "K", "n", "4", "b", "t", "1"), listOf("κ", "hl")),
+    PreDefinedCandidate("i", listOf("i", "I", "1", "j", "T", ";", "'", "t", "+"), listOf()),
+    PreDefinedCandidate("j", listOf("j", "J", ")", "i", "I", ",", "g", "]", "1"), listOf()),
+    PreDefinedCandidate("k", listOf("k", "K"), listOf("κ")),
+    PreDefinedCandidate("l", listOf("l", "t", "1", "e", "d", "h", "f", "x", "b"), listOf()),
+    PreDefinedCandidate("m", listOf("m", "n", "M", "x", "w", "u"), listOf("min", "sin", "mm", "ms")),
+    PreDefinedCandidate("n", listOf("n", "a", "m", "r", "∧", "u", "x", "∩", "π", "·"), listOf("cm", "sin", "dm")),
+    PreDefinedCandidate("o", listOf("0", "o", "O", ".", "·"), listOf("∘")),
+    PreDefinedCandidate("p", listOf("p", "P", "ρ", "f", "F", "t"), listOf()),
+    PreDefinedCandidate("q", listOf("q", "g", "y", "4", "G", "9", "r", "V", "a"), listOf("cot")),
+    PreDefinedCandidate("r", listOf("r", "n", "v", "m", "t", "+", "p", "·", "."), listOf("ν")),
+    PreDefinedCandidate("s", listOf("s", "S", "5", "=", "g"), listOf()),
+    PreDefinedCandidate("t", listOf("t", "+", "e", "E", "i", "l", "(", "f", "x"), listOf("∈")),
+    PreDefinedCandidate("u", listOf("u", "n", "a", "4", "U", "y", "m", "r", "9", "α"), listOf()),
+    PreDefinedCandidate("v", listOf("v", "V", "∨", "r", "γ", "⊖"), listOf("ν", "dt", "dl")),
+    PreDefinedCandidate("w", listOf("w", "W", "N", "⊂", "n"), listOf("ω", "ms", "ha", "sin", "tan", "cos")),
+    PreDefinedCandidate("x", listOf("x", "×", "X"), listOf("⊗")),
+    PreDefinedCandidate("y", listOf("y", "g", "Y", "b", "4", "z", "t", "r"), listOf("cg")),
+    PreDefinedCandidate("z", listOf("z", "Z", "2", "="), listOf("ℤ")),
+
+    PreDefinedCandidate("A", listOf("A", "H", "R", "t", "f", "K", "k"), listOf("λ", "ℝ")),
+    PreDefinedCandidate("B", listOf("B", "β", "D"), listOf("ℝ", "tan")),
+    PreDefinedCandidate("C", listOf("C", "c", "(", "a", "<"), listOf("⊂", "ℂ")),
+    PreDefinedCandidate("D", listOf("D", "B", "P", "0", "b", "∩", "p"), listOf("Δ")),
+    PreDefinedCandidate("E", listOf("E", "I", "±", "t", "F", "=", "π"), listOf("τ", "≡", "≒")),
+    PreDefinedCandidate("F", listOf("F", "f", "E", "t", "I"), listOf("Γ", )),
+    PreDefinedCandidate("G", listOf("G", "a"), listOf("cot")),
+    PreDefinedCandidate("H", listOf("H", "4", "M", "A", "N"), listOf()),
+    PreDefinedCandidate("I", listOf("I", "1", "±", "[", "E", "l", "]", "=", "F"), listOf("Γ")),
+    PreDefinedCandidate("J", listOf("J", "j", "5", "I", "]", "T"), listOf()),
+    PreDefinedCandidate("K", listOf("K", "k"), listOf("κ")),
+    PreDefinedCandidate("L", listOf("L", "l", "1", "(", "2", "t"), listOf("ι")),
+    PreDefinedCandidate("M", listOf("M", "H", "N", "n", "m", "≠", "4", "u"), listOf("µ", "ℕ", "µs")),
+    PreDefinedCandidate("N", listOf("N", "M", "H"), listOf("ℕ")),
+    PreDefinedCandidate("O", listOf("O", "0", "o"), listOf("∘")),
+    PreDefinedCandidate("P", listOf("P", "p"), listOf("ρ")),
+    PreDefinedCandidate("Q", listOf("Q", "a", "α"), listOf("ℚ", "∝", "cl", "tan")),
+    PreDefinedCandidate("R", listOf("R", "k", "K", "r"), listOf("ℝ", "κ")),
+    PreDefinedCandidate("S", listOf("S", "s", "5", "g", "G"), listOf("∫", "ζ", "ξ")),
+    PreDefinedCandidate("T", listOf("T", "t", "+"), listOf("τ")),
+    PreDefinedCandidate("U", listOf("U", "u", "∪", "n", "K", "4", "k", "a"), listOf("κ", "υ", "dt")),
+    PreDefinedCandidate("V", listOf("V", "v", "∨", "⊖", "∪"), listOf("ν", "cl")),
+    PreDefinedCandidate("W", listOf("W", "w", "N"), listOf("hl", "ω", "ms", "ml", "tan")),
+    PreDefinedCandidate("X", listOf("X", "x", "×"), listOf("⊗")),
+    PreDefinedCandidate("Y", listOf("Y", "γ", "Υ", "y", "x", "'"), listOf("∯", "ℚ")),
+    PreDefinedCandidate("Z", listOf("Z", "z", "2", "E"), listOf("ℤ")),
+
+    PreDefinedCandidate("(", listOf("(", "1", "{", "[", "l", "|", "I", "t", "{", "·"), listOf("ι", "⊆")),
+    PreDefinedCandidate(")", listOf(")", "1", "}", "]", ">", ",", "'", "7", "y", "x", "·", "."), listOf("⟩")),
+    PreDefinedCandidate("{", listOf("{", "(", "[", "L"), listOf("ξ", "∑", "ε", "Σ")),
+    PreDefinedCandidate("}", listOf("}", ")", "]"), listOf("3", "ξ", "ζ")),
+    PreDefinedCandidate("[", listOf("[", "(", "{" ), listOf()),
+    PreDefinedCandidate("]", listOf("]", ")", "}" ), listOf()),
+
+    PreDefinedCandidate(".", listOf("·", ".", "-", "_", "=", "2", "r", "a", "s"), listOf()),
+    PreDefinedCandidate("+", listOf("+", "t", "-", "_", "1", "4", "x", "="), listOf("⊥", "→")),
+    PreDefinedCandidate("-", listOf("-", "_", "=", "+", "1", "P", "0", "r", "2"), listOf()),
+    PreDefinedCandidate("×", listOf("×", "x", "X"), listOf()),
+    PreDefinedCandidate("÷", listOf("÷", "=", "i", "-", "_", "+"), listOf("≒")),
+    PreDefinedCandidate("=", listOf("=", "-", "i", "_", "1", "I"), listOf("≃")),
+    PreDefinedCandidate(">", listOf(">", "⊖", "7", "<", ")"), listOf("⟩")),
+    PreDefinedCandidate("<", listOf("<", "c", ">", "C", "a", "(", "."), listOf("⟨", "cm", "∂", "∠")),
+    PreDefinedCandidate("≥", listOf("≥", "2", "z", "Z", "="), listOf("ℤ", "⇔", "⊇")),
+    PreDefinedCandidate("≤", listOf("≤", "<"), listOf("∄", "⊆")),
+
+    PreDefinedCandidate("±", listOf("±", "t", "+", "I", "1", "f"), listOf("⊥")),
+    PreDefinedCandidate("√", listOf("√", "r", "v", "N", "T", "t", "V"), listOf("Γ", "ℕ", "⊄")),
+    PreDefinedCandidate("∞", listOf("∞", "0", "n", "o", ".", "·"), listOf("cos", "cot", "sin")),
+    PreDefinedCandidate("∅", listOf("∅", "ϕ", "Φ", "9", "Q", "q", "g"), listOf("↔")),
+    PreDefinedCandidate("∩", listOf("∩", "n", "Π", "π", "r", "M", "Λ", "∧", "."), listOf("∏")),
+    PreDefinedCandidate("∪", listOf("∪", "U", "u", "0", "v", "∨", "V", "O"), listOf("υ")),
+    PreDefinedCandidate("α", listOf("α", "a", "d", "0", "x", "o", "∞"), listOf("∝", "∂")),
+    PreDefinedCandidate("β", listOf("β", "B", "R", "ρ", "f"), listOf("∀", "ℕ", "cg", "cos")),
+    PreDefinedCandidate("γ", listOf("r", "γ", "n", "x", "T", "t", "v"), listOf("ν", "Γ")),
+    PreDefinedCandidate("θ", listOf("θ", "Θ", "⊖", "∝", "0", "Q"), listOf("∥", "cl", "cg", "kg", "tan")),
+    PreDefinedCandidate("π", listOf("π", "Π", "x"), listOf("lim")),
+)
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/jiix/Symbol.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/jiix/Symbol.kt
new file mode 100644
index 0000000..175488b
--- /dev/null
+++ b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/jiix/Symbol.kt
@@ -0,0 +1,4 @@
+package com.knowre.android.myscript.iink.jiix
+
+
+data class Symbol(val symbol: String, val candidates: List<String>)
\ No newline at end of file
diff --git a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/view/MyScriptView.kt b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/view/MyScriptView.kt
index 0d6bc30..f08ae29 100644
--- a/myscript-iink/src/main/java/com/knowre/android/myscript/iink/view/MyScriptView.kt
+++ b/myscript-iink/src/main/java/com/knowre/android/myscript/iink/view/MyScriptView.kt
@@ -13,11 +13,10 @@ import com.myscript.iink.uireferenceimplementation.R
 class MyScriptView constructor(
     context: Context,
     attrs: AttributeSet? = null
-
 ) : FrameLayout(context, attrs) {
 
     private val binding = ViewMyscriptBinding.inflate(LayoutInflater.from(context), this, true)
-    val editorView: EditorView = findViewById(R.id.editor_view)
+    internal val editorView: EditorView = findViewById(R.id.editor_view)
 
     init {
         with(editorView) {
@@ -30,5 +29,4 @@ class MyScriptView constructor(
             }
         }
     }
-
 }
\ No newline at end of file