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Graph system G16 Realm V, volume 17 of 42

Canonical and duplicate document graph

Which URLs describe duplicate documents, and what canonical signals are observed?

By Joseph W. Anady 144 words 1 min read

RESEARCHED · RESEARCHED ·

Researched designNot deployed

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Contents

Question§

Which URLs describe duplicate documents, and what canonical signals are observed?

Nodes§

URL; Document version; Declared canonical; Observed engine canonical

Relationship sketch§

  • URL → declared canonical
  • inspection observation → selected canonical
  • document → duplicate candidate

Evidence inputs§

Page headers/HTML, sitemaps, redirect signals, actual engine inspection when available.

Implementation§

Store publisher declared and engine observed canonicals separately. Review cross domain canonical proposals for real document duplication; do not canonicalize distinct services merely to connect brands.

Acceptance checks§

  • Each observation distinguishes intent from engine behavior
  • Canonical targets are valid intended documents
  • Conflicting page/header signals are reported

Do not infer§

Canonicalizing a page does not merge people or organizations.

Publication boundary§

Page canonical signals public; inspection records private.

Source basis§

S17, S08. See Research/sources.json. Sources support the primitives or named technology. The organization, labels, actions, and acceptance contracts in this catalog are this library's design, not claimed provider requirements.

Sources consulted

  1. S08General structured data guidelines. Google. Observed 2026-09-12. Visible content accuracy, policies, and feature eligibility. Register entry
  2. S17Consolidate duplicate URLs. Google. Observed 2026-09-12. Canonicalization of duplicate or similar documents and associated signals. Register entry

Roads from here

Cite this volume

APA

Anady, J. W. (2026, September 12). Canonical and duplicate document graph (Graph system G16). FeedTheJoe Library, release 2026.09.12-g40. THATDEVELOPERGUY LLC. https://library.feedthejoe.com/graph-systems/g16-canonical-and-duplicate-document-graph/

Chicago

Anady, Joseph W. “Canonical and duplicate document graph.” Graph system G16. FeedTheJoe Library, release 2026.09.12-g40. THATDEVELOPERGUY LLC, September 12, 2026. https://library.feedthejoe.com/graph-systems/g16-canonical-and-duplicate-document-graph/.

MLA

Anady, Joseph W. “Canonical and duplicate document graph.” FeedTheJoe Library, release 2026.09.12-g40, THATDEVELOPERGUY LLC, 12 Sept. 2026, library.feedthejoe.com/graph-systems/g16-canonical-and-duplicate-document-graph/.

BibTeX

@misc{anady2026g16,
  author       = {Anady, Joseph W.},
  title        = {{Canonical and duplicate document graph}},
  howpublished = {FeedTheJoe Library, Graph system G16},
  publisher    = {THATDEVELOPERGUY LLC},
  year         = {2026},
  month        = sep,
  note         = {Release 2026.09.12-g40},
  url          = {https://library.feedthejoe.com/graph-systems/g16-canonical-and-duplicate-document-graph/}
}

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The Markdown edition carries the full text with front matter, including any sections written for AI agents.

curl -s https://library.feedthejoe.com/graph-systems/g16-canonical-and-duplicate-document-graph.md

History

  1. Published on feedthejoe.com in edition 2026.09.12-g40.
  2. Moved to library.feedthejoe.com; typography set to house style with no change of substance.

Previously at https://feedthejoe.com/library/graph-systems/g16-canonical-and-duplicate-document-graph/, which now redirects here.