You can view the requirements for the Scope statement in ISO Directives Part 2, clause 6.2.1:

http://www.iec.ch/tiss/iec/Directives-Part2-Ed5.pdf

I'd like to propose this:

"This standard specifies the characteristics of an XML-based application-independent and platform-independent digital document file format, as well as the characteristics of software applications which read, write and process such documents. This standard is applicable to document authoring, editing, viewing, exchange and archiving, including text documents, spreadsheets, presentation graphics, drawings, charts and similar documents commonly used by personal productivity software applications."