Summary Introduction Specification 1: Datamodel 1.1: Core Structures 1.2: Extension Structures Appendix A: Message Categories Appendix B: Scalar Value Types Appendix C: Datamodel Map Extensions 4/OCS-M: Digital Media 5/OCS-N: Menus 6/OCS-C: Commerce 7/OCS-L: Lab Testing 8/OCS-X: Proximity 9/OCS-O: OAuth 10/OCS-A: Accounting RFC Reference Raw 10/OCS-A: Accounting 9/OCS-O: OAuth 8/OCS-X: Proximity 7/OCS-L: Lab Testing 6/OCS-C: Commerce 5/OCS-N: Menus 4/OCS-M: Digital Media 3/OCS Draft 2/COSS Stable 1/C4 Deprecated Retired