Message Segment: Markup Begin

Beginning of rich text markup.

Property Name	Type	Description	Filter Group and Version	Available Version
`htmlTag`	String	The HTML tag for this markup.	Small, 35.0	35.0
`markupType`	String	Specifies the type of rich text markup. `Bold`—Bold tag. `Code`—Code tag. `Italic`—Italic tag. `ListItem`—List item tag. `OrderedList`—Ordered list tag. `Paragraph`—Paragraph tag. `Strikethrough`—Strikethrough tag. `Underline`—Underline tag. `UnorderedList`—Unordered list tag. To handle `markupType` values introduced in later API versions, clients can render the `text` value as a fallback.	Small, 35.0	35.0
`text`	String	Empty string, `""`, for segments of this type.	Small, 35.0	35.0
`type`	String	`MarkupBegin`	Small, 35.0	35.0

Chatter REST API Developer Guide