diff --git a/x-pack/legacy/plugins/index_management/public/app/components/mappings_editor/constants/data_types_definition.tsx b/x-pack/legacy/plugins/index_management/public/app/components/mappings_editor/constants/data_types_definition.tsx
index b4f599c3efce9f..0e3775e3ea2142 100644
--- a/x-pack/legacy/plugins/index_management/public/app/components/mappings_editor/constants/data_types_definition.tsx
+++ b/x-pack/legacy/plugins/index_management/public/app/components/mappings_editor/constants/data_types_definition.tsx
@@ -257,6 +257,26 @@ export const TYPE_DEFINITION: { [key in DataType]: DataTypeDefinition } = {
     documentation: {
       main: '/object.html',
     },
+    description: () => (
+      <p>
+        <FormattedMessage
+          id="xpack.idxMgmt.mappingsEditor.dataType.objectLongDescription"
+          defaultMessage="Object fields can contain children. To allow child objects to be queried independently of one another, use the {nested}."
+          values={{
+            nested: (
+              <EuiLink href={documentationService.getTypeDocLink('nested')} target="_blank">
+                {i18n.translate(
+                  'xpack.idxMgmt.mappingsEditor.dataType.objectLongDescription.nestedTypeLink',
+                  {
+                    defaultMessage: 'nested data type',
+                  }
+                )}
+              </EuiLink>
+            ),
+          }}
+        />
+      </p>
+    ),
   },
   nested: {
     label: i18n.translate('xpack.idxMgmt.mappingsEditor.dataType.nestedDescription', {
@@ -266,6 +286,26 @@ export const TYPE_DEFINITION: { [key in DataType]: DataTypeDefinition } = {
     documentation: {
       main: '/nested.html',
     },
+    description: () => (
+      <p>
+        <FormattedMessage
+          id="xpack.idxMgmt.mappingsEditor.dataType.nestedLongDescription"
+          defaultMessage="Like {objects}, nested fields can contain children. The difference is that their child objects can be queried independently of one another."
+          values={{
+            objects: (
+              <EuiLink href={documentationService.getTypeDocLink('object')} target="_blank">
+                {i18n.translate(
+                  'xpack.idxMgmt.mappingsEditor.dataType.nestedLongDescription.objectTypeLink',
+                  {
+                    defaultMessage: 'objects',
+                  }
+                )}
+              </EuiLink>
+            ),
+          }}
+        />
+      </p>
+    ),
   },
   rank_feature: {
     label: i18n.translate('xpack.idxMgmt.mappingsEditor.dataType.rankFeatureDescription', {
@@ -275,6 +315,26 @@ export const TYPE_DEFINITION: { [key in DataType]: DataTypeDefinition } = {
     documentation: {
       main: '/rank-feature.html',
     },
+    description: () => (
+      <p>
+        <FormattedMessage
+          id="xpack.idxMgmt.mappingsEditor.dataType.rankFeatureLongDescription"
+          defaultMessage="Ranke feature fields accept numbers that will boost documents in {rankFeatureQuery}."
+          values={{
+            rankFeatureQuery: (
+              <EuiLink href={documentationService.getRankFeatureQueryLink()} target="_blank">
+                {i18n.translate(
+                  'xpack.idxMgmt.mappingsEditor.dataType.rankFeatureLongDescription.queryLink',
+                  {
+                    defaultMessage: 'rank_feature queries',
+                  }
+                )}
+              </EuiLink>
+            ),
+          }}
+        />
+      </p>
+    ),
   },
   rank_features: {
     label: i18n.translate('xpack.idxMgmt.mappingsEditor.dataType.rankFeaturesDescription', {
@@ -284,6 +344,26 @@ export const TYPE_DEFINITION: { [key in DataType]: DataTypeDefinition } = {
     documentation: {
       main: '/rank-features.html',
     },
+    description: () => (
+      <p>
+        <FormattedMessage
+          id="xpack.idxMgmt.mappingsEditor.dataType.rankFeaturesLongDescription"
+          defaultMessage="Ranke features fields accept numeric feature vectors that will boost documents in {rankFeatureQuery}."
+          values={{
+            rankFeatureQuery: (
+              <EuiLink href={documentationService.getRankFeatureQueryLink()} target="_blank">
+                {i18n.translate(
+                  'xpack.idxMgmt.mappingsEditor.dataType.rankFeaturesLongDescription.queryLink',
+                  {
+                    defaultMessage: 'rank_feature queries',
+                  }
+                )}
+              </EuiLink>
+            ),
+          }}
+        />
+      </p>
+    ),
   },
   dense_vector: {
     label: i18n.translate('xpack.idxMgmt.mappingsEditor.dataType.denseVectorDescription', {
@@ -454,6 +534,26 @@ export const TYPE_DEFINITION: { [key in DataType]: DataTypeDefinition } = {
     documentation: {
       main: '/percolator.html',
     },
+    description: () => (
+      <p>
+        <FormattedMessage
+          id="xpack.idxMgmt.mappingsEditor.dataType.percolatorLongDescription"
+          defaultMessage="Use this data type to enable {percolator}."
+          values={{
+            percolator: (
+              <EuiLink href={documentationService.getPercolatorQueryLink()} target="_blank">
+                {i18n.translate(
+                  'xpack.idxMgmt.mappingsEditor.dataType.percolatorLongDescription.learnMoreLink',
+                  {
+                    defaultMessage: 'percolator queries',
+                  }
+                )}
+              </EuiLink>
+            ),
+          }}
+        />
+      </p>
+    ),
   },
   join: {
     label: i18n.translate('xpack.idxMgmt.mappingsEditor.dataType.joinDescription', {
@@ -463,6 +563,14 @@ export const TYPE_DEFINITION: { [key in DataType]: DataTypeDefinition } = {
     documentation: {
       main: '/parent-join.html',
     },
+    description: () => (
+      <p>
+        <FormattedMessage
+          id="xpack.idxMgmt.mappingsEditor.dataType.joinLongDescription"
+          defaultMessage="Join fields define parent-child relationships among documents of the same index."
+        />
+      </p>
+    ),
   },
   alias: {
     label: i18n.translate('xpack.idxMgmt.mappingsEditor.dataType.aliasDescription', {
diff --git a/x-pack/legacy/plugins/index_management/public/app/services/documentation.ts b/x-pack/legacy/plugins/index_management/public/app/services/documentation.ts
index 81d7a2bfcba781..036388452f8763 100644
--- a/x-pack/legacy/plugins/index_management/public/app/services/documentation.ts
+++ b/x-pack/legacy/plugins/index_management/public/app/services/documentation.ts
@@ -57,6 +57,14 @@ class DocumentationService {
     return `${this.esDocsBase}/dynamic-field-mapping.html`;
   }
 
+  public getPercolatorQueryLink() {
+    return `${this.esDocsBase}/query-dsl-percolate-query.html`;
+  }
+
+  public getRankFeatureQueryLink() {
+    return `${this.esDocsBase}/rank-feature.html`;
+  }
+
   public getMetaFieldLink() {
     return `${this.esDocsBase}/mapping-meta-field.html`;
   }