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A logical construct that constitutes an unordered list of A-V pairs that collectively describe or identify one or more operating systems, software applications, or hardware devices. Unordered means that there is no prescribed order in which A-V pairs should be listed, and there is no specified relationship (hierarchical, set-theoretic, or otherwise) among attributes. WFNs must satisfy the criteria specified in the CPE Naming specification [CPE23-N:5.2]. For a full description and usage constraints on WFN logical attribute values, see Section 5 of the CPE Naming specification [CPE23-N:5].