Identifier Description Intended Semantics Reference IdentifierIntended SemanticsReference IdentifierIntended SemanticsReference IdentifierIntended SemanticsReference Identifier Address Encoding Prefix Encoding Mapping to/from IPv4/v6 Reference Identifier Entity Identifier Encoding Hierarchy and Inheritance Media Type of Defining Resource Mapping to ALTO Address Type Reference Identifier Intended Semantics Media Type of Defining Resource Reference Error CodeIntended UsageReference