Update overview.md

Author: dimodi

components/editor/prosemirror-schema/overview.md

@@ -10,17 +10,24 @@ position: 0
 
 # ProseMirror Schema Overview
 
-The Telerik UI for Blazor Editor component is based on the <a href="https://prosemirror.net/" target="_blank">ProseMirror library</a>. ProseMirror provides a set of tools and concepts for building rich textual editors, using user interface inspired by the What-You-See-Is-What-You-Get (WYSIWYG).
+The Telerik UI for Blazor Editor component is based on the [ProseMirror library](https://prosemirror.net/). ProseMirror provides a set of tools and concepts for building rich textual editors, using user interface inspired by the What-You-See-Is-What-You-Get (WYSIWYG).
 
 ## Schema Concept
 
-ProseMirror defines its own data structure, the <a href="https://prosemirror.net/docs/ref/#model.Node" target="_blank">`Node`</a>, to represent content documents. The <a href="https://prosemirror.net/docs/guide/#doc" target="_blank">ProseMirror document</a> is a tree-like structure comprised of nodes. A document is an instance of `Node` with children that are also instances of `Node`.
+ProseMirror defines its own data structure, the [`Node`](https://prosemirror.net/docs/ref/#model.Node), to represent content documents. The [ProseMirror document](https://prosemirror.net/docs/guide/#doc) is a tree-like structure comprised of nodes. A document is an instance of `Node` with children that are also instances of `Node`.
 
-Each ProseMirror `document` conforms to a specific <a href="https://prosemirror.net/docs/guide/#schema" target="_blank">schema</a>. Document schemas allow you to edit documents with a custom structure without writing your own editor from scratch.
+Each ProseMirror `document` conforms to a specific [schema](https://prosemirror.net/docs/guide/#schema). Document schemas allow you to edit documents with a custom structure without writing your own editor from scratch.
 
-The schema describes all nodes that may occur in the document, the way they are nested, and any marks applied to them. A mark is a piece of information that can be attached to a node. For example, emphasized text, text in code block or a link. It has a type and optionally a set of attributes that provide further information (such as the target of the link).
+The Prosemirror schema describes:
 
-For more details, refer to the <a href="https://prosemirror.net/docs/guide/#schema" target="_blank">ProseMirror schema guide</a>.
+* All HTML elements and attributes that may occur in the document.
+* What tag nesting is allowed.
+* What is the order or the HTML attributes.
+* What marks can be applied to a HTML node. A mark is a piece of information that can be attached to a node. For example, emphasized text, text in code block or a link. It has a type and optionally a set of attributes that provide further information (such as the target of the link).
+
+As a result, the Editor may automatically modify its initial `Value` on first user interaction.
+
+For more details, refer to the [ProseMirror schema guide](https://prosemirror.net/docs/guide/#schema).
 
 ## Editor Schema