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Part II. Phased Implementation Plan for DMAC- Task 2: Develop Preliminary IOOS Metadata Standardº Category: Committee workº Deliverables: Initial IOOS Metadata Standards- Task 3: Establish Liaison with metadata standards groups like FGDC.º Category: Committee work- Task 4: Make interim list of keywords and a data dictionaryº Category: Committee work- Task 5: Study use of thesauri to enable machine-to-machine interoperability with semanticmeaning.º Note: If thesauri are used, they will have to be maintained through a fair sized effort consideringthe variety of data and the complexity of language.º Category: Committee work- Task 6: W/G incorporates input from expert subcommittees, results of studies, R&D, pilots,etc. into subsequent standards updates up to the release of the Interim Standards. Circulatesdraft interim standards for community comment. Specification will include guidelines onData Quality issues along with lineage issues.º Category: Committee work- Task 7: Develop policy for granularity of metadata.º Category: Committee workº Deliverables: IOOS Metadata Standards, keywords and data dictionary plus any updates orinterim releases as needed- Task 8: Develop guidance on metadata for subsetting and aggregation.º Category: Committee workº Description: This assumes that related metadata would be delivered along with transporteddata. How should the metadata change when the transported data are not identical to thesource data? This must have strong representation from the Data Transport team and ajoint sub-group should be considered. This is an activity overseen by the core standardsgroup.º Task 8-1: Determine metadata modification for subsetted data.• Includes temporal, spatial, and parameter subsetsº Task 8-2: Determine metadata modification for aggregated data.• Case 1: Data are from the same provider and same data type.• Case 2: Data are from different sources, may or may not be same data type.º Task 8-3: Determine metadata modification requirements for products or merged data.• Assumption is data products will have own unique metadata.• Key question: Should source data metadata be also delivered with product?º Deliverables: Documented guidance on metadata for subsetting and aggregationº Partnerships: Data Transport, Data Products78