Represents a collection of _CustomXMLPart objects.
Assembly: office (in office.dll)
References to DTDs from custom XML parts are not supported. DTD references in custom XML parts will not resolve, and custom XML parts containing DTD references generate an exception when an attempt is made to save the file's content to a flat XML file.
There are three default parts that are always created with a document. These are 'Cover pages', 'Doc properties' and 'App properties'. The last two were in previous versions of Microsoft Word but are now provided in XML form in the object collection