What are the five SWHID object types and what exactly is hashed for each, so I can tell what a given swh:1:... string identifies?

SWHID core identifiers are SHA-1 hashes over Git-style serializations: content ids hash only the file bytes behind a 'blob' header (no file name), directories hash sorted entries with modes, and revisions/releases also hash metadata such as author, committer, timestamps and message, so the same tree committed twice yields different revision ids but the same directory id; Git compatibility is described as incidental, not guaranteed. Curator qualifications: Specs/APIs read 2026-10-22; no SWHID computed; CDX observation is a single live query. Syntax (ch. 4), qualifiers (ch. 6) and SWH preference for dir ids not re-read (producer). Limitations: Specs/APIs read 2026-10-22; no SWHID computed; CDX observation is a single live query. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

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      "url": "https://github.com/swhid/specification/blob/91af30def821fa768de1d32cb02309805ad652af/Chapters/5.Core_identifiers.md",
      "note": "swhid/specification Chapters/5.Core_identifiers.md at 91af30d"
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      "url": "https://github.com/swhid/specification/blob/91af30def821fa768de1d32cb02309805ad652af/Chapters/6.Qualified_identifiers.md",
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