MC-3032: Update Documentation

- change allowed_parents to parents and children

Author: krissyhiserote

app/code/Magento/PageBuilder/docs/content-type-configuration.md

@@ -81,10 +81,7 @@ The following is an example of a content type configuration in `view/adminhtml/p
           icon="icon-pagebuilder-image"
           sortOrder="1"
           translate="label">
-        <allowed_parents>
-            <parent name="row"/>
-            <parent name="column"/>
-        </allowed_parents>
+        <children default_policy="deny"/>
         <appearances>
             <appearance default="true"
                         name="poster"
@@ -204,7 +201,8 @@ The following is an example of a content type configuration in `view/adminhtml/p
 | Element             | Description                                                                                                                                 |
 | ------------------- | ------------------------------------------------------------------------------------------------------------------------------------------- |
 | `type`              | Describes the content type name, translated field, and sort order in the menu group. Each type should have its own configuration file.      |
-| `allowed_parents`   | List of parent content types that can accept this type as a child.                                                                          |
+| `parents`           | List of parent content types that can accept this type as a child.                                                                          |
+| `children`          | List of children content types that can accept this type as a parent.                                                                       |
 | `appearances`       | Appearance configuration.                                                                                                                   |
 | `is_visible`        | Determines menu visibility for the component. System components should not be visible in the menu. Default value is true.                   |
 | `additional_data`   | Allows to specify additional data for component, see [custom configuration for content type](custom-configuration.md) for more information. |
@@ -231,17 +229,44 @@ The `form` element specifies the name of the UiComponent form used to configure
 
 Any modifications you might want to make to content type configuration forms use standard UiComponent functionality. Please see [UiComponent Documentation](http://devdocs.magento.com/guides/v2.3/ui_comp_guide/bk-ui_comps.html) for additional information.
 
-### `allowed_parents` configuration reference
+### `parents` configuration reference
 
-The `allowed_parents` element specifies which content types can accept this type as a child.
+The `parents` element specifies which content types can accept this type as a child.
 
 **Example:**
 ``` xml
-<allowed_parents>
-    <parent name="row"/>
-    <parent name="column"/>
-</allowed_parents>
+<parents default_policy="deny">
+    <parent name="row" policy="allow"/>
+    <parent name="column" policy="allow"/>
+</parents>
 ``` 
+| Element             | Description                                                                            |
+| ------------------- | -------------------------------------------------------------------------------------- |
+| `parent`            | The name of the parent content type that is allowed or denied.                         |
+
+| Attribute           | Description                                                                            |
+| ------------------- | -------------------------------------------------------------------------------------- |
+| `default_policy`    | Allows or denies all content types to be parents unless specified as a parent element. |
+
+### `children` configuration reference
+
+The `children` element specifies which content types can accept this type as a parent.
+  
+**Example:**
+``` xml
+<children default_policy="allow">
+    <child name="row" policy="deny"/>
+    <child name="column" policy="deny"/>
+</children>
+``` 
+| Element             | Description                                                                            |
+| ------------------- | -------------------------------------------------------------------------------------- |
+| `child`             | The name of the child content type that is allowed or denied                           |
+
+| Attribute           | Description                                                                            |
+| ------------------- | -------------------------------------------------------------------------------------- |
+| `default_policy`    | Allows or denies all content types to be children unless specified as a child element. |
+
 ### `appearances` configuration reference
 
 The `appearances` element specifies how the content type renders in the admin preview and the master format.

app/code/Magento/PageBuilder/docs/how-to-add-new-content-type.md

@@ -60,9 +60,9 @@ To add configuration for a new content type, create a file under the following l
               icon="icon-modulename-simple"
               sortOrder="35"
               translate="label">
-            <allowed_parents>
-                <parent name="row"/>
-            </allowed_parents>
+            <parents default_policy="deny">
+                <parent name="row" policy="allow"/>
+            </parents>
             <appearances>
                 <appearance default="true"
                             name="default"
@@ -264,10 +264,13 @@ Now, let's add content type that can contain other content types. Create configu
               icon="icon-vendorname-complex"
               sortOrder="35"
               translate="label">
-            <allowed_parents>
-                <parent name="row"/>
-                <parent name="column"/>
-            </allowed_parents>
+            <parents default_policy="deny">
+                <parent name="row" policy="allow"/>
+                <parent name="column" policy="allow"/>
+            </parents>
+            <children default_policy="deny">
+                <child name="heading" policy="allow"/>
+            </children>
             <appearances>
                 <appearance default="true"
                             name="default"
@@ -300,22 +303,6 @@ Now, let's add content type that can contain other content types. Create configu
 </config>
 ```
 
-Now we need to specify which content types can be inserted into our new content type. To allow default content type Heading be inserted into our Complex content type, add the following configuration.
-
-`Vendor\ModuleName\view\adminhtml\pagebuilder\content_type\heading.xml`
-
-``` XML
-<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_PageBuilder:etc/content_type.xsd">
-    <content_types>
-        <type name="heading">
-            <allowed_parents>
-                <parent name="complex"/>
-            </allowed_parents>
-        </type>
-    </content_types>
-</config>
-```
-
 Now need to create preview and render templates.
 
 `Vendor/ModuleName/view/adminhtml/web/template/content-type/complex/default/preview.html`