A directory attribute type, used to uniquely identify this integer-valued directory attribute (and also any matching string-valued directory attribute in 'xcmCommsDirStringTable'), when combined with 'xcmCommsDirAttributeIndex' (below). Usage: When directory attribute type indicates integer-valued, the value of 'xcmCommsDirAttributeValue' SHALL be the actual value of this directory attribute. Usage: When directory attribute type indicates string-valued, the value of 'xcmCommsDirAttributeValue' SHALL be zero, EXCEPT for a directory attribute type of 'protocolTyped...', when the protocol type shall be specified as the integer value. The actual string-valued attribute SHALL be specified in an exactly matching row of 'xcmCommsDirStringTable'. Usage: Matching directory attributes (string-valued) SHALL be specified in an exactly matching row of 'xcmCommsDirStringTable'. Matching rows have EXACTLY the SAME values of 'xcmCommsDirRecordType', 'xcmCommsDirRecordIndex', 'xcmCommsDirAttributeType', and 'xcmCommsDirAttributeIndex'. Usage: Parallel directory attributes (peers of this one) SHALL be specified in parallel (NOT matching) rows of 'xcmCommsDirAttributeTable' (integer-valued attributes) or 'xcmCommsDirStringTable' (string-valued attributes). Parallel rows have EXACTLY the SAME values of 'xcmCommsDirRecordType', 'xcmCommsDirRecordIndex', and 'xcmCommsDirAttributeIndex', but MUST have a DIFFERENT value of 'xcmCommsDirAttributeType'. Usage: When directory attribute type is 'protocolTyped...' the particular protocol layer SHALL be specified by placing a a value from the enumeration 'XcmCommsStackExtProtocol' in 'xcmCommsDirAttributeValue' for this row.