Citation

Citations are inline references that can provide users more detailed information about the inline reference. Corresponding inline citations should be present in the message text in a markup format of <chat-citation data-id="{id}">{text}</chat-citation>. Citations are only supported when the message's markupSyntax is set to MARKDOWN.

Unreferenced citations in Elements.citations (those without a matching <chat-citation> tag in the message text) are ignored and do not cause the message to be rejected.

JSON representation 
{
  "id": string,
  "citedSources": [
    {
      object (CitedSource)
    }
  ]
}
Fields
id

string

Required. The ID of the citation. This ID is defined by the app creating the citation and must match the data-id attribute of the <chat-citation> tag in the message text. Must contain only ASCII letters and numbers, and less than 63 characters.
citedSources[]

object (CitedSource)

Optional. A list of sources that are relevant to the citation. Sources are displayed in the citation hover card.