Identifiers are used to identify reference types and address types in the reference and to identify attributes and their syntax in the attribute operations.
The FN_identifier_t type is used to represent an identifier. It consists of an unsigned integer, which determines the format of identifier, and the actual identifier, which is expressed as a sequence of octets.
XFN defines a small number of standard forms for identifiers, as shown in Table 2-4.
Table 2-4 XFN Identifier Formats
Identifier Format |
Description |
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The identifier is an ASCII string (ISO 646). |
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The identifier is an OSF DCE UUID in string representation. See the X/Open DCE RPC (ISBN 1-872630-95-2). |
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The identifier is an ISO OID in ASN.1 dot-separated integer list string format. See the ISO ASN.1 (ISO 8824). |