Trace the source.
Keep the evidence.
Source Atlas separates primary-source acquisition from the interpretation of framework crosswalks.
Locate original documents
Discover each publisher’s official landing page, full publication, downloadable data, and source repository. A crosswalk is only a lead for discovery.
Record editions independently
Publisher-declared versions are different from retrieval snapshots. Multiple byte-level snapshots can belong to one edition. Neither date nor a web page update proves a new version.
Respect reuse rights
Every original enters private storage first. Public distribution requires a source-level rights review and attestation for the exact artifact, including third-party material.
Diff without losing provenance
The local Python archive stores original bytes and extracts normalized content for comparison. The Astro site presents only the curated public metadata and approved artifacts.
The catalogue is not a certification, a legal opinion, or evidence that crosswalk mappings satisfy any referenced standard. Provisional seed claims remain marked until independently verified.