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The semantic infrastructure will provide metadata for discovery of these datasets. Comples Complex temporal and spatial queries will be informed by the metadata but will be formulated and executed by the platform.

In order to also discover dataset contents exposed on the GRID, the ECCF registry must have linkages from dataset metadata to the metadata about the data they contain. This is distinct from the metadata about the dataset (the owner, creation time, table structure of fields and attributes) and instaed decribes the type of data contents of the dataset so that a user can retrieve portions of a dataset of some type.

Link to use case satisfied from caGRID 2.0 Roadmap: The oncologist must be able to quickly find glioblastoma data sets, indicating the fields that he is interested in comparing from his clinical data in order to find similar disease conditions and associated treatment plans. Temporal queries allow clinicians to identify changes in patient condition and treatment over time.

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