This Recommendation defines the specification for CPE applicability language. The Recommendation also defines and explains the requirements that producers of CPE applicability language-supporting implementations@ such as software and services@ and CPE applicability language content must meet to claim compliance with this Recommendation. As this Recommendation defines these specifications by listing the relevant clauses of the NIST Interagency Report 7698 Common Platform Enumeration: Applicability Language specification version 2.3 and showing whether they are normative or informative@ all other versions are out of the scope of this Recommendation as are all CPE specifications other than CPE applicability language.