{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp04_retrieval_first_paired20_20260802","cell_id":"layer_decay_and_expiration_management__education_pedagogy","hypothesis_id":"H1","search_queries":["curriculum repository obsolete resources superseded current version search ranking teachers","learning object repository resource versioning superseded metadata standard","OER repository outdated resources teachers current curriculum alignment study","patent educational content repository stale version successor routing search","official LMS learning object repository overwrite old version no longer appears searches dynamic links new version","Canvas Commons resource update newer version outdated content notification official","Dublin Core metadata isReplacedBy replaces learning resource version status standard","educational resource semantic staleness detection curriculum alignment outdated automatic"],"sources":[{"source_id":"PA-S1","title":"Publish (add) objects to Brightspace Learning Repository","publisher":"D2L Brightspace","url":"https://community.d2l.com/brightspace/kb/articles/3678-publish-add-objects-to-brightspace-learning-repository","source_class":"OFFICIAL_PRODUCT_DOCUMENTATION","claims_supported":["Brightspace overwriting creates a new learning-object version while retaining the replaced object.","The new version appears in searches, the overwritten version no longer appears, and existing dynamic links resolve to the new version, closely matching search demotion and successor routing.","Locked links may continue pointing to the old version, demonstrating an explicit preservation exception."]},{"source_id":"PA-S2","title":"How do I view updates to resources I previously imported from Commons?","publisher":"Instructure","url":"https://community.instructure.com/en/kb/articles/664549-how-do-i-view-updates-to-resources-i-previously-imported-from-commons","source_class":"OFFICIAL_PRODUCT_DOCUMENTATION","claims_supported":["Canvas Commons notifies users when an imported educational resource has a newer version and shows the version currently in use.","Users can replace the previous version, inspect version history, or dismiss the update, implementing lifecycle state visibility and an exception pathway."]},{"source_id":"PA-S3","title":"DCMI Metadata Terms: Is Replaced By","publisher":"Dublin Core Metadata Initiative","url":"https://www.dublincore.org/specifications/dublin-core/dcmi-terms/terms/isReplacedBy/","source_class":"STANDARD","claims_supported":["Dublin Core defines isReplacedBy as a machine-readable relation to a resource that supersedes the described resource.","The standardized inverse Replaces/isReplacedBy relation supplies the proposed successor marker at the metadata level."]},{"source_id":"PA-S4","title":"ISO/IEC 19788-2:2011 — Metadata for learning resources — Dublin Core elements","publisher":"International Organization for Standardization","url":"https://www.iso.org/standard/46157.html","source_class":"STANDARD","claims_supported":["ISO/IEC 19788-2 provides a Dublin-Core-derived metadata element set specifically for describing learning resources.","Supersession relations therefore sit within an established standards pathway for educational-resource repositories, although the standard does not prescribe ranking behavior."]},{"source_id":"PA-S5","title":"Use of Open Educational Resources in an Era of Common Standards: A Case Study on the Use of EngageNY","publisher":"RAND Corporation","url":"https://www.rand.org/content/dam/rand/pubs/research_reports/RR1700/RR1773/RAND_RR1773.pdf","source_class":"PRIMARY_RESEARCH","claims_supported":["The mixed-source case study used repository analytics, a nationally representative teacher-panel survey, and teacher interviews.","It reports that repository searches may steer teachers toward popular rather than high-quality, standards-aligned materials and that standards changes can erode the benefit of formerly aligned resources.","It finds that standards and district guidance materially influence teachers' curriculum-resource choices, supporting the practical importance of current-authority signals."]},{"source_id":"PA-S6","title":"Are Open Educational Resources the New Textbooks?","publisher":"Institute of Education Sciences, U.S. Department of Education","url":"https://ies.ed.gov/learn/blog/are-open-educational-resources-new-textbooks","source_class":"GOVERNMENT_OR_REGULATOR","claims_supported":["Changing academic standards can make curriculum materials obsolete.","Teachers face substantial search, suitability-assessment, and vetting burdens when using OER repositories."]}],"proximity":"ESTABLISHED_PRACTICE","closest_analogues":[{"name":"Brightspace Learning Repository overwrite and dynamic-link behavior","similarity":"Near-exact operational match for known version lineages: a successor replaces an older learning object in search results, existing dynamic references route to the successor, and the old object remains retained rather than deleted.","remaining_difference":"Supersession is declared through an overwrite operation; the documentation does not show semantic-staleness detection across independently published resources or a controlled test of teacher selection errors and retrieval time.","source_ids":["PA-S1"]},{"name":"Canvas Commons resource-update lifecycle","similarity":"Strong match for version-state visibility, update notification, replacement, version history, and user-authorized preservation of an older educational resource.","remaining_difference":"Updating is opt-in and copy-oriented; the source does not establish automatic search demotion, reference redirection, semantic staleness inference, or measured teacher retrieval outcomes.","source_ids":["PA-S2"]},{"name":"Dublin Core supersession relations applied through learning-resource metadata standards","similarity":"The standardized isReplacedBy/Replaces relation supplies a durable, machine-readable successor marker, and ISO/IEC 19788 places Dublin Core elements in a learning-resource metadata framework.","remaining_difference":"Metadata standards encode lineage but do not themselves detect staleness, alter retrieval ranking, route users, or validate effects on teachers.","source_ids":["PA-S3","PA-S4"]}],"overlapping_components":["explicit curriculum-resource version identity","current-versus-superseded lifecycle state","machine-readable supersession marker","suppression of an overwritten version from ordinary search","routing of dynamic references to the successor","preserved version history and lineage","exceptions for locked links or deliberately retained versions","update notification and revalidation workflow","learning-resource metadata standardization"],"remaining_contrastive_claim":"For distributed curriculum resources whose lineage has not been manually declared, semantic-staleness inference combined with successor-aware ranking reduces teachers' selection of superseded materials without increasing median retrieval time beyond version labels and repository-native update mechanisms alone.","claim_falsifier":"The claim would be falsified by a pre-existing product, patent, or study demonstrating semantic detection of supersession across independently published curriculum resources plus automatic demotion and successor routing with equivalent teacher outcomes, or by a controlled retrieval trial showing no selection-error reduction or a material increase in median retrieval time.","problem_support":"MODERATE","recommendation":"RESEARCH","world_novelty_boundary":"Version labeling, supersession metadata, old-version search suppression, successor routing, update notification, and lineage preservation are established educational-repository practices; this bounded eight-query search found no opened source establishing the narrower combination of semantic staleness discovery across undeclared or distributed curriculum lineages and a controlled teacher selection-error/retrieval-time result, but that absence is not evidence of world novelty."}