Read-write. Universal ID of the target document.
String
To get: unid$ = notesRichTextDocLink .DocUNID
To set: notesRichTextDocLink .DocUNID = unid$
If the doclink does not target a document, this property is 32 zeros.
@DocumentUniqueID in the formula language
DocUNID property in Java™ RichTextDocLink class