diff --git a/eo-maven-plugin/src/test/java/org/eolang/maven/AssembleMojoTest.java b/eo-maven-plugin/src/test/java/org/eolang/maven/AssembleMojoTest.java
index 68d0c51531..8f8c6c153c 100644
--- a/eo-maven-plugin/src/test/java/org/eolang/maven/AssembleMojoTest.java
+++ b/eo-maven-plugin/src/test/java/org/eolang/maven/AssembleMojoTest.java
@@ -98,6 +98,7 @@ void assemblesNotFailWithFailOnErrorFlag(@TempDir final Path temp) throws Except
                 "+alias stdout org.eolang.io.stdout",
                 "+home https://github.com/objectionary/eo",
                 "+package test",
+                "+version 0.0.0",
                 "",
                 "[x] < wrong>\n  (stdout \"Hello!\" x).print\n"
             ),
@@ -109,6 +110,7 @@ void assemblesNotFailWithFailOnErrorFlag(@TempDir final Path temp) throws Except
                 "+alias stdout org.eolang.io.stdout",
                 "+home https://github.com/objectionary/eo",
                 "+package test",
+                "+version 0.0.0",
                 "",
                 "[x] > main\n  (stdout \"Hello!\" x).print\n"
             ),
diff --git a/eo-parser/src/main/java/org/eolang/parser/ParsingTrain.java b/eo-parser/src/main/java/org/eolang/parser/ParsingTrain.java
index 30c59945ec..6d89524225 100644
--- a/eo-parser/src/main/java/org/eolang/parser/ParsingTrain.java
+++ b/eo-parser/src/main/java/org/eolang/parser/ParsingTrain.java
@@ -53,11 +53,6 @@ public final class ParsingTrain extends TrEnvelope {
 
     /**
      * Sheets in the right order.
-     *
-     * @todo #1542:90m Add xsl transformation
-     *  that checks the presence of +version meta.
-     *  The version meta have to be correct.
-     *  It can be divided by 2 xsl checks.
      */
     private static final String[] SHEETS = {
         "/org/eolang/parser/errors/not-empty-atoms.xsl",
@@ -78,6 +73,7 @@ public final class ParsingTrain extends TrEnvelope {
         "/org/eolang/parser/warnings/unsorted-metas.xsl",
         "/org/eolang/parser/warnings/incorrect-architect.xsl",
         "/org/eolang/parser/warnings/incorrect-home.xsl",
+        "/org/eolang/parser/warnings/incorrect-version.xsl",
         "/org/eolang/parser/expand-aliases.xsl",
         "/org/eolang/parser/resolve-aliases.xsl",
         "/org/eolang/parser/synthetic-references.xsl",
@@ -89,6 +85,7 @@ public final class ParsingTrain extends TrEnvelope {
         "/org/eolang/parser/warnings/duplicate-metas.xsl",
         "/org/eolang/parser/warnings/mandatory-package-meta.xsl",
         "/org/eolang/parser/warnings/mandatory-home-meta.xsl",
+        "/org/eolang/parser/warnings/mandatory-version-meta.xsl",
         "/org/eolang/parser/warnings/correct-package-meta.xsl",
         "/org/eolang/parser/errors/unused-aliases.xsl",
         "/org/eolang/parser/errors/data-objects.xsl",
diff --git a/eo-parser/src/main/resources/org/eolang/parser/warnings/incorrect-version.xsl b/eo-parser/src/main/resources/org/eolang/parser/warnings/incorrect-version.xsl
new file mode 100644
index 0000000000..2eb37432c4
--- /dev/null
+++ b/eo-parser/src/main/resources/org/eolang/parser/warnings/incorrect-version.xsl
@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+The MIT License (MIT)
+
+Copyright (c) 2016-2023 Objectionary.com
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+-->
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" id="incorrect-version" version="2.0">
+  <xsl:output encoding="UTF-8" method="xml"/>
+  <xsl:template match="/program/errors">
+    <xsl:copy>
+      <xsl:apply-templates select="node()|@*"/>
+      <xsl:for-each select="/program/metas/meta">
+        <xsl:variable name="meta-head" select="head"/>
+        <xsl:variable name="meta-tail" select="tail"/>
+        <xsl:if test="$meta-head='version' and not(matches($meta-tail, '^(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)$'))">
+          <xsl:element name="error">
+            <xsl:attribute name="check">
+              <xsl:text>incorrect-version</xsl:text>
+            </xsl:attribute>
+            <xsl:attribute name="line">
+              <xsl:value-of select="@line"/>
+            </xsl:attribute>
+            <xsl:attribute name="severity">
+              <xsl:text>warning</xsl:text>
+            </xsl:attribute>
+            <xsl:text>Wrong format of semver"</xsl:text>
+            <xsl:value-of select="$meta-tail"/>
+            <xsl:text>"</xsl:text>
+          </xsl:element>
+        </xsl:if>
+      </xsl:for-each>
+    </xsl:copy>
+  </xsl:template>
+  <xsl:template match="node()|@*">
+    <xsl:copy>
+      <xsl:apply-templates select="node()|@*"/>
+    </xsl:copy>
+  </xsl:template>
+</xsl:stylesheet>
diff --git a/eo-parser/src/main/resources/org/eolang/parser/warnings/mandatory-version-meta.xsl b/eo-parser/src/main/resources/org/eolang/parser/warnings/mandatory-version-meta.xsl
new file mode 100644
index 0000000000..2002d4e1d4
--- /dev/null
+++ b/eo-parser/src/main/resources/org/eolang/parser/warnings/mandatory-version-meta.xsl
@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+The MIT License (MIT)
+
+Copyright (c) 2016-2023 Objectionary.com
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+-->
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" id="mandatory-version-meta" version="2.0">
+  <xsl:output encoding="UTF-8"/>
+  <xsl:template match="/program/errors">
+    <xsl:copy>
+      <xsl:apply-templates select="node()|@*"/>
+      <xsl:if test="count(/program/metas/meta[head ='version'])=0">
+        <xsl:element name="error">
+          <xsl:attribute name="check">
+            <xsl:text>missing-version-meta</xsl:text>
+          </xsl:attribute>
+          <xsl:attribute name="line">
+            <xsl:value-of select="@line"/>
+          </xsl:attribute>
+          <xsl:attribute name="severity">
+            <xsl:text>warning</xsl:text>
+          </xsl:attribute>
+          <xsl:text>Missing version meta</xsl:text>
+        </xsl:element>
+      </xsl:if>
+      <xsl:if test="count(/program/metas/meta[head ='version'])&gt;1">
+        <xsl:element name="error">
+          <xsl:attribute name="check">
+            <xsl:text>more-one-version-meta</xsl:text>
+          </xsl:attribute>
+          <xsl:attribute name="line">
+            <xsl:value-of select="@line"/>
+          </xsl:attribute>
+          <xsl:attribute name="severity">
+            <xsl:text>warning</xsl:text>
+          </xsl:attribute>
+          <xsl:text>More than one version specified</xsl:text>
+        </xsl:element>
+      </xsl:if>
+    </xsl:copy>
+  </xsl:template>
+  <xsl:template match="node()|@*">
+    <xsl:copy>
+      <xsl:apply-templates select="node()|@*"/>
+    </xsl:copy>
+  </xsl:template>
+</xsl:stylesheet>
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/add-locators.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/add-locators.yaml
index eb6e06d051..6356bd686f 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/add-locators.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/add-locators.yaml
@@ -22,6 +22,7 @@ eo: |
   +alias x
   +package org.abc
   +home www.abc.com
+  +version 0.0.0
   
   [] > a
     b > @
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/add-probes.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/add-probes.yaml
index 2ac893fb20..9aec91c28a 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/add-probes.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/add-probes.yaml
@@ -11,6 +11,7 @@ tests:
 eo: |
   +home https://github.com/objectionary/eo
   +package org.eolang.custom
+  +version 0.0.0
 
   [] > app
     QQ.txt.sprintf > @
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-incorrect-version.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-incorrect-version.yaml
new file mode 100644
index 0000000000..64b63df225
--- /dev/null
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-incorrect-version.yaml
@@ -0,0 +1,16 @@
+xsls:
+  - /org/eolang/parser/warnings/incorrect-version.xsl
+tests:
+  - /program/errors[count(error[@severity='warning'])=2]
+  - /program/errors/error[@line='3']
+  - /program/errors/error[@line='5']
+
+eo: |
+  +version 0.0.0
+  +version 0.2.1
+  +version alpha
+  +alias org.eolang.io.stdout
+  +version 1.0.0-alpha.beta
+
+  [x] > foo
+    x.div in.nextInt > @
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-mandatory-version-meta.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-mandatory-version-meta.yaml
new file mode 100644
index 0000000000..e91ee975cc
--- /dev/null
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-mandatory-version-meta.yaml
@@ -0,0 +1,12 @@
+xsls:
+  - /org/eolang/parser/warnings/mandatory-version-meta.xsl
+tests:
+  - /program/errors[count(error[@severity='warning'])=1]
+  - /program/errors[count(error[@severity='error'])=0]
+eo: |
+  +home https://github.com/objectionary/eo
+  +package test
+  +alias stding org.eolang.io.stdin
+
+  [] > main
+    (stdout "Hello, world!").print > @
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-not-one-version-meta.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-not-one-version-meta.yaml
new file mode 100644
index 0000000000..96b719f54d
--- /dev/null
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-not-one-version-meta.yaml
@@ -0,0 +1,15 @@
+xsls:
+  - /org/eolang/parser/warnings/mandatory-version-meta.xsl
+tests:
+  - /program/errors[count(error[@severity='warning'])=1]
+  - /program/errors[count(error[@severity='error'])=0]
+eo: |
+  +alias stding org.eolang.io.stdin
+  +alias stdout org.eolang.io.stdout
+  +home https://github.com/objectionary/eo
+  +package sandbox
+  +version 0.0.0
+  +version 0.0.0
+
+  [] > main
+    (stdout "Hello, world!").print
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/empty-vs-free.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/empty-vs-free.yaml
index 6638aa9716..cc4502e9ed 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/empty-vs-free.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/empty-vs-free.yaml
@@ -6,5 +6,7 @@ tests:
 eo: |
   +home https://github.com/objectionary/eo
   +package test
+  +version 0.0.0
+
   [x] > foo
     [] > y
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/leap-year.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/leap-year.yaml
index 0f0f1ce120..b89ee0b5d2 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/leap-year.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/leap-year.yaml
@@ -13,6 +13,7 @@ eo: |
   +alias org.eolang.txt.scanner
   +home https://github.com/objectionary/eo
   +package test
+  +version 0.0.0
 
   [args] > main
     [y] > leap
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/priority/additional-brackets.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/priority/additional-brackets.yaml
index aa2889fa69..dd57edcbdc 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/priority/additional-brackets.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/priority/additional-brackets.yaml
@@ -4,6 +4,7 @@ tests:
 eo: |
   +home https://github.com/objectionary/eo
   +package org.eolang.priority
+  +version 0.0.0
 
   [] > x
     1.times 2 (1.plus other.value)
\ No newline at end of file
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/priority/space-between.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/priority/space-between.yaml
index 6d0b54b9b1..ecf40f249f 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/priority/space-between.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/priority/space-between.yaml
@@ -5,6 +5,7 @@ tests:
 eo: |
   +home https://github.com/objectionary/eo
   +package org.eolang.priority
+  +version 0.0.0
 
   [] > sum
     ^.a.plus ^.b > @
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/recursion.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/recursion.yaml
index eb32c30ee0..9c2e1a714d 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/recursion.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/recursion.yaml
@@ -1,10 +1,11 @@
 tests:
   - /program/errors[count(*)=0]
-  - //o[@name='f' and @line='4']
-  - //o[@base='f' and @ref='4']
+  - //o[@name='f' and @line='5']
+  - //o[@base='f' and @ref='5']
 eo: |
   +home https://github.com/objectionary/eo
   +package test
+  +version 0.0.0
   [args...] > main
     [n] > f
       f 5 > @
diff --git a/eo-parser/src/test/resources/org/eolang/parser/packs/redundency/redundent-parentheses.yaml b/eo-parser/src/test/resources/org/eolang/parser/packs/redundency/redundent-parentheses.yaml
index 1cc9925833..e86d029762 100644
--- a/eo-parser/src/test/resources/org/eolang/parser/packs/redundency/redundent-parentheses.yaml
+++ b/eo-parser/src/test/resources/org/eolang/parser/packs/redundency/redundent-parentheses.yaml
@@ -1,9 +1,10 @@
 tests:
   - /program/errors[count(error)=1]
-  - //error[@severity='warning' and @line=5 and text()="'(1.plus 2)' contains redundant parentheses"]
+  - //error[@severity='warning' and @line=6 and text()="'(1.plus 2)' contains redundant parentheses"]
 eo: |
   +home https://github.com/objectionary/eo
   +package a.b.c
+  +version 0.0.0
 
   [] > x
     (1.plus 2) > y
\ No newline at end of file