Doc metadata resource names query

The Document Metadata endpoint returns a “resources” object, containing names in the format ““application/pdf” or “application/xhtml+xml”.
Are these the only resource names possible?
My app will need to parse this string, so I need to know what to expect.

@daniel_aston

The documentation lists (see link below) the document types that could be returned but document types could be removed or added in the future, and as stated not all types will be returned for all documents. Currently we have just PDF, but shortly accounts filings will be available in both PDF and iXBLR/XBRL, if they were filed electronically.

Thanks,

Mark.