A DCP Document is a container for Document data/content.
The data/content may be anything, a WebDAV server, like an HTTP server,
does not necessarily mandate what type of data/content may be contained
within Documents. The type of data/content is defined by the MediaType
property which is different from the content type returned from the
XContent::getContentType method. The MediaType property
is mapped to the equivalent WebDAV property and the WebDAV server calculates
the value.