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Part II. Phased Implementation Plan for DMAC3. Data Archiving and Access (AA) Requirements1. Vision1.1. IOOS Data Archiving and Access (AA) will be a distributed system of interconnected archiveand data centers that functions collaboratively to receive and preserve the data, and provideeasy and efficient access to the data. Search and discovery of data and products will be easy andwill directly support the seven IOOS goals.1.2. Archive collections range greatly in size, complexity, and importance to public and scientificneeds. Currently, diverse data service paradigms are used to support access to the archives.IOOS data transport methods, metadata standards, and data discovery interfaces shall beimplemented in the Archive System. The result will be a system that provides more uniformaccess across multiple archive centers and that can handle all collections consistently. The datadiscovery component will allow access by both humans and machines.Figure 3. The Archive System represents an alternative view of those DMAC Subsystem elements that are involvedwith data archival. Primary archival (solid lines) and access (dashed lines) show data fl ow. Not shown are other datafl ows that are essential to IOOS but not directly pertinent to the Archive System.67