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# Data stores – collections of data records

The `scinexus` package provides data store. A data store is a collection of data members of the same type (e.g. all `.fasta` files in a directory). Data stores allow you to apply an app or composed pipeline to many data records without writing loops.

## Using data stores with cogent3

Use the `open_data_store()` function to open a data store and a loader app (see app types) to read member data.

## Applying a pipeline to a data store

See the scinexus documentation for full details on data store types, structure, operations, locking, logging, and citations.