MIME Types is a property in the portal.properties file, which is the default configuration file for Sun GlassFish Web Space Server. You can override this property using portal-ext.properties file.
Input a list of comma-delimited mime types that are not available by default from javax.activation.MimetypesFileTypeMap.
mime.types=\ application/pdf pdf,\ application/vnd.ms-excel xls,\ application/vnd.ms-powerpoint ppt,\ application/msword doc |