Orphan pages
An orphan page has no crawlable inbound link from the connected site graph.
How it works
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.
How to validate it
Derive the HTML link graph from served content, verify zero inbound edges, and compare sitemap fetch time with the orphan page’s first request.
Common failure
Calling a URL an orphan while actively submitting it through IndexNow confounds sitemap discovery with direct notification.
Machine-readable editions
The same article is available as Markdown and JSON. These alternates are linked here but are not submitted through the sitemap or IndexNow.