Annotations
Within a WordprocessingML document, annotations refer to various types of supplementary markup which may be stored inside or around a region of text within the document's contents.
example: : The types of supplementary information stored within a document may include: comments, revisions, spelling and/or grammatical errors, bookmark information and optional editing permissions.
Within a document's contents, annotations are stored in one of three different methods:
Inline
"Cross Structure"
Properties
These three forms are needed in order to maintain compatibility with both the legacy annotations functionality of current word processing applications and the requirements of an XML-based format (i.e. wellformedness of the resulting XML markup). These three forms are referenced within the individual annotation types described in the following sub clauses.