tn.ff.contenttypes
Content types to associate with flat file documents. Separate content types with a comma. If you do not include this property in the properties.cnf file, documents with the content type text/plain are treated as flat files.
You cannot register these content types as flat files:

application/x-www-form-urlencoded

text/xml

application/x-wmrpc2

application/x-x509v3-bin

application/x-wmrpc

application/x-wmrpc-bin

application/x-wmidatabin

application/wm-soap

application/soap

application/soap+xml