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I.V. Background
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## I.V. Background

The ebXML specifications contain detailed definitions for the ebXML Message Service protocol, Collaboration Protocol Profile (CPP) and Collaboration Protocol Agreement (CPA). The specifications do not, however, define details for implementing these components. Specifically, they do not explicitly define the formats or acceptable values for many of the elements contained in the ebMS message, CPP, or CPA. Elements such as Party Id, Service and Action, and the CPA Id are defined; however the proper formats and values for these elements are left up to the implementer.

This document will define the STAR guidelines and best practices for implementing the ebXML messaging service and the CPP/CPA. Required and recommended formats and acceptable values will be defined for key ebXML elements. These implementation guidelines will ensure consistent usage of the ebXML specifications for all STAR members and help to ensure interoperability.

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