{
  "schemaVersion": "crawler-atlas-1",
  "atlasVersion": "atlas-2026-07-28-v1",
  "canonical": "/atlas/orphan-pages",
  "title": "Orphan pages",
  "category": {
    "slug": "discovery",
    "title": "Discovery and crawl frontiers"
  },
  "definition": "An orphan page has no crawlable inbound link from the connected site graph.",
  "mechanism": "It may still be found through a sitemap, an external link, a feed, a historical index, or a direct submission. Those discovery channels should be measured separately.",
  "validation": "Derive the HTML link graph from served content, verify zero inbound edges, and compare sitemap fetch time with the orphan page’s first request.",
  "commonFailure": "Calling a URL an orphan while actively submitting it through IndexNow confounds sitemap discovery with direct notification.",
  "related": [
    "/atlas/sitemap-discovery",
    "/atlas/internal-links"
  ],
  "modified": "2026-07-28"
}