Data documentation from EOIR

We collect any government documents and information that shed light on the tables, fields, and values in government data systems. These include:

1. Internal documentation: The agency’s own documentation of its data systems, including data dictionaries and codebooks.
2. Training materials: Training materials for agency staff on using data systems.
3. Privacy Impact Assessments (PIAs): Documents which outline the fields collected in government data systems and how they interrelate, as required by the E-Government Act of 2002.
4. System of Records Notices (SORNs): Similar but often distinct content to PIAs, required for public disclosure under the Privacy Act of 1974.
5. Court documents: Documents including sworn declarations from agency staff from litigation.

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See agency documentation for documents from all agencies.

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Some documents were obtained via a FOIA request by the ACLU of Southern California, the National Immigration Project, and Mission Action.