file_in_collection.tsv

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Assignment of a file as a member of a collection

If populated, file_in_collection.tsv will contain one row for every assignment of a file as a member of a collection.

All fields are required: this table can be empty (header-row only), but any non-header rows must leave no fields blank.

Some examples:

• If you don't have any files contained in collections, this table should be left empty.
• If each file is contained in exactly one collection, this table will have the same number of rows as file.tsv.
• If each file is simultaneously a member of three collections, this table will have three times as many rows as file.tsv.

Usage note:

• If a file is a member of collection X, and collection X is itself a subcollection of some other collection Y (as expressed in the collection_in_collection table), then file_in_collection.tsv should only record the membership of the file in collection X: the file's (transitive) membership in collection Y will be automatically computed. In general, file_in_collection.tsv should record only the most specific (leaf-most) collection memberships: transitive membership of files in ancestor/superset collections will be automatically inferred from the containment relationships expressed in collection_in_collection.

Field	Field Description	Required?	Field Value Type	Extra Info
file_id_namespace	Identifier namespace for this file [part 1 of 4-component composite primary key]	Required	string	This will be the value of id_namespace in the row in file.tsv corresponding to the file referenced in this row. If your program has not registered multiple CFDE identifier namespaces, this will be exactly the same value for all rows.
file_local_id	The ID of this file [part 2 of 4-component composite primary key]	Required	string	This will be the value of local_id in the row in file.tsv corresponding to the file referenced in this row.
collection_id_namespace	Identifier namespace for this collection [part 3 of 4-component composite primary key]	Required	string	This will be the value of id_namespace in the row in collection.tsv corresponding to the collection referenced in this row. If your program has not registered multiple CFDE identifier namespaces, this will be exactly the same value for all rows.
collection_local_id	The ID of this collection [part 4 of 4-component composite primary key]	Required	string	This will be the value of local_id in the row in collection.tsv corresponding to the collection referenced in this row.

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