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Part II. Phased Implementation Plan for DMAC2.8. The MMS shall include mechanisms to facilitate the generation of metadata as close as possibleto the collection and/or generation of the source data.2.9. The MMS shall provide automated tools for versioning and configuration management ofmetadata.2.10. The MMS shall provide a mechanism to access existing metadata servers to promote harvestingmetadata.3. Metadata Catalog. The MMS shall include a metadata catalog.3.1. The implementation of the metadata catalog is TBD, but it is a requirement that the collectiveholdings of metadata shall comprise a distributed catalog. The implementation shall providefor integration of all such distributed sub-catalogs.3.2. The catalog shall provide a capability to generate metadata records from self-describing datasources in which metadata and data have been integrated.3.3. The catalog contents shall include items that will be used for discovery.3.3.1. The catalog shall provide access control of metadata records, for maintenance and forviewing and searching on those records.3.3.2. The catalog shall allow a catalog search from public search engines.4. Search/Query Mechanism. The IOOS shall include a search/query mechanism.4.1. The search interface shall search the MC for records that meet user-defined criteria.4.2. End users and data providers can search for specific data sets.4.3. End users and data providers can browse metadata about IOOS data holdings.4.4. Automated agents can search for data.4.5. The MC shall include a stable, documented-defined application programmers’ interface (API)and a defined access protocol.4.6. The search system shall support TBD types of actual data searches along with metadata searches.4.7. The search system shall provide the following types of searches:4.7.1. Full text and fielded searches4.7.1.1. Controlled vocabulary4.7.1.2. Free-text searches4.7.1.2.1. Single or multiple word searches4.7.1.2.2. Boolean operators on multiple words4.7.1.2.3. Thesauri to support text searches4.7.2. Geospatial search4.7.3. Temporal search4.7.4. Thematic search4.7.5. Parameter search60