The purpose of the BIDM is to define the minimal set of information about assets that reuse libraries should be able to exchange to support interoperability. Because the BIDM describes a minimal set, other data that would be useful for interoperability, including library data model information, is not included in the BIDM. Furthermore, the BIDM does not include communication protocol or related standards. Other RIG standards will address these aspects of interoperability. More information about the RIG and about some of these future standards is included in annex A. Important terms used in the BIDM are defined in clause 2. The core of the BIDM standard is contained in clause 3, which includes a description of the meta-model of the BIDM and a definition of the data model for basic interoperability.