'''Service Modeling Language''' '''(SML)''' isand '''Service Modeling Language Interchange Format''' '''(SML-IF)''' are a pair of [[XML]]-based specifications created by leading [[information technology]] companies that define a set of [[XML]] instance document extensions for expressing links between elements, a set of [[XML Schema_(W3C)|XML Schema]] extensions for constraining those links, and a way to associate [[Schematron]] rules with global element declarations, global complex type definitions, and/or model documents. The SML<ref>[http://www.w3.org/TR/sml/ Latest draft of the SML specification]</ref> [[specification]] defines model concepts, and the SML-IF<ref>[http://www.w3.org/TR/sml-if/ Latest draft of the SML-IF specification]</ref> [[specification]] describes a packaging format for exchanging SML-based models.
SML isand currentlySML-IF beingwere standardized in a [[W3C]] working group chartered to produce W3C Recommendations for the Service Modeling Language by refining the “Service Modeling Language” (SML) Member Submission <ref>[http://www.w3.org/Submission/2007/01/ “Service Modeling Language” (SML) Member Submission]</ref>, addressing implementation experience and feedback on the specifications. The submission was from an industry group consisting of representatives from BEA Systems, BMC, CA, Cisco, Dell, EMC, HP, IBM, Intel, Microsoft, and Sun Microsystems. They were published as [[W3C Recommendation]]s on May 12, 2009<ref>[http://www.w3.org/2009/04/sml-pressrelease.html.en SML and SML-IF Recommendation Press Release]</ref>.
