{"result":{"depiction_url":null,"edges":{"subject":{"objects":[{"created":"2026-11-05T18:42:37Z","object_id":{"id":2555,"is_a":["categorization","keyword","keyword_information_type"],"name":"zotonic_topic_reference","title":"Reference","uri":"https:\/\/zotonic.com\/id\/2555"},"seq":1},{"created":"2026-11-05T18:42:37Z","object_id":{"id":2564,"is_a":["categorization","keyword","keyword_audience"],"name":"zotonic_topic_backend_developer","title":"Backend developer","uri":"https:\/\/zotonic.com\/id\/2564"},"seq":2},{"created":"2026-11-05T18:42:37Z","object_id":{"id":2577,"is_a":["categorization","keyword","keyword_domain"],"name":"zotonic_topic_image_management","title":"Image management","uri":"https:\/\/zotonic.com\/id\/2577"},"seq":3},{"created":"2026-11-05T18:42:37Z","object_id":{"id":2627,"is_a":["categorization","keyword","keyword_architecture"],"name":"zotonic_topic_notification","title":"Notification","uri":"https:\/\/zotonic.com\/id\/2627"},"seq":4},{"created":"2026-11-05T18:42:37Z","object_id":{"id":2646,"is_a":["categorization","keyword","keyword_task"],"name":"zotonic_topic_transform","title":"Transform","uri":"https:\/\/zotonic.com\/id\/2646"},"seq":5}],"predicate":{"id":308,"is_a":["meta","predicate"],"name":"subject","title":{"_type":"trans","tr":{"en":"Keyword"}},"uri":"http:\/\/purl.org\/dc\/elements\/1.1\/subject"}}},"id":3137,"is_a":["text","documentation","reference","notification"],"links":[{"rel":"self","target":"https:\/\/zotonic.com\/.zotonic\/websub\/topic\/3137"},{"rel":"hub","target":"https:\/\/zotonic.com\/.zotonic\/websub"}],"medium":null,"medium_url":null,"name":"doc_notification_media_preview_revision","page_url":{"en":"https:\/\/zotonic.com\/docs\/3137\/observe_media_preview_revision-3","x-default":"https:\/\/zotonic.com\/docs\/3137\/observe_media_preview_revision-3"},"preview_url":null,"resource":{"version":11,"pivot_location_lat":null,"title":"observe_media_preview_revision\/3","is_authoritative":true,"body":"<p>Contribute normalized resource edit settings to the signed preview revision.\nReturn a list with <code>{Module, Settings}<\/code> prepended to the accumulator. Contributions\nmust be stable terms and include every persistent setting affecting image edits.\nThe core hashes the sorted contributions; they do not enter the rendering pipeline.<\/p>\n<p>Called when generating preview URLs and checking preview retention. This must be\ninexpensive and must not download or inspect source files. The <code>original<\/code> image\noption bypasses revision tracking. <code>#media_preview_revision.id<\/code> is the resource id.<\/p>\n<p>Type: <a href=\"\/id\/doc_developerguide_notifications#notification-foldl\">foldl<\/a>.<\/p>","slug":"observe_media_preview_revision-3","is_protected":false,"visible_for":0,"tz":"UTC","language":["en"],"doc_source_hash":"c8f459f6bee2f6edbc0e513c9add260de361b21101653d9e1227088a16eb344a","is_featured":false,"notification":{"arity":3,"callbacks":[{"arity":3,"name":"observe_media_preview_revision","signature":"observe_media_preview_revision\/3","variation":"observe"}],"name":"media_preview_revision","record":null},"content_group_id":{"id":2551,"is_a":["meta","content_group"],"name":"content_group_imported_docs","title":"Imported documentation","uri":"https:\/\/zotonic.com\/id\/content_group_imported_docs"},"category_id":{"id":1122,"is_a":["meta","category"],"name":"notification","title":"Notifications","uri":"https:\/\/test.zotonic.com\/id\/1122"},"doc_source_path":"apps\/zotonic_core\/src\/behaviours\/zotonic_observer.erl","publication_start":"2026-11-05T18:42:37Z","github_url":"https:\/\/github.com\/zotonic\/zotonic\/blob\/master\/apps\/zotonic_core\/src\/behaviours\/zotonic_observer.erl","pivot_location_lng":null,"doc_source_kind":"notification","name":"doc_notification_media_preview_revision","is_unfindable":false,"is_published":true,"pivot_geocode":null,"created":"2026-11-05T18:42:37Z","uri":null,"doc_status":"current","is_dependent":false,"publication_end":"9999-06-01T00:00:00Z","modifier_id":{"id":1,"is_a":["person"],"name":"administrator","title":"Site Administrator","uri":"https:\/\/zotonic.com\/id\/1"},"privacy":0,"doc_source_commit":"becf161621dcc4de964bbf083a88aff6d3ab21ae\n","creator_id":{"id":1,"is_a":["person"],"name":"administrator","title":"Site Administrator","uri":"https:\/\/zotonic.com\/id\/1"},"modified":"2026-11-05T18:42:37Z","title_slug":"observe_media_preview_revision-3"},"uri":"https:\/\/zotonic.com\/id\/3137","uri_template":"https:\/\/zotonic.com\/id\/:id","websub":{"hub":"https:\/\/zotonic.com\/.zotonic\/websub","topic":"https:\/\/zotonic.com\/.zotonic\/websub\/topic\/3137"}},"status":"ok"}