MarkupElement Class

public class MarkupElement : Element

Public Class MarkupElement
	Inherits Element

public ref class MarkupElement : public Element

type MarkupElement = 
    class
        inherit Element
    end

Inheritance

Object    Element    MarkupElement

This will allow build components and topic authors to add HTML or other elements such as include elements for localized shared content to a pre-transformed document. This prevents it from being removed as unrecognized content by the transformations.

An optional contentType attribute is supported that defines the type of content (Html, OpenXml, or Markdown). This allows rendering of content based on the content type supported by the presentation style.

When specified, presentation styles that only support Open XML will only render markup element content with a content type of "OpenXml". Presentation styles that only support Markdown will only render markup element content with a content type of "Html" or "Markdown". All others will only render the content if the type is "Html". If the attribute is omitted, the content will be rendered regardless of the presentation style's formats whether or not they actually support it.

Reference