{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.wm-vrt-013","code":"wm-vrt-013-digital-thread","url":"https://ver.cy/models/wm-vrt-013-digital-thread/","name":"Digital Thread","alternateNames":[],"kind":"world-model","status":"todo","version":"unversioned","language":"en","classifiers":{"family":"World Models","category":"Information and virtual systems","entryKind":"pattern","plane":"","domain":["INF.VRT.THR"],"industry":["Cross-industry"],"navPath":"NAV.INF.VRT.THR","tags":["digital","thread","inf.vrt.thr"],"facets":{}},"whatItIs":"A digital thread is the set of authoritative links that connect the records of one product or asset across its lifecycle, from requirements and design through manufacturing and the as-built item to operation, maintenance and its digital twin. The individual records it links, and the digital twin as a live model of one asset, are separate subjects.","purpose":"Lifecycle federation across design, item, operations and twin","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["A federation of links across lifecycle records, not a single model or database.","Spans organizations and systems, from design tools to maintenance records.","Supports a digital twin but is not the live model of an asset.","Its value depends on links to specific versions, not just to documents."],"structure":{"bundles":[{"id":"VRT013-B1","name":"Thread scope","description":"What the thread connects.","layers":[{"id":"VRT013-B1-L1","name":"Subject and lifecycle span","description":"The product or asset and the lifecycle stages covered.","findings":[{"id":"VRT013-F01","name":"Thread subject","description":"The product, item or fleet the thread is about.","questions":[{"text":"Which product type, serial item or fleet does the thread cover?","id":"VRT013-Q01"},{"text":"Which lifecycle stages from requirements to disposal are linked?","id":"VRT013-Q02"}]},{"id":"VRT013-F02","name":"Authoritative sources","description":"The systems of record for each stage.","questions":[{"text":"Which system is authoritative for each lifecycle stage?","id":"VRT013-Q03"},{"text":"Who owns each linked source?","id":"VRT013-Q04"}]}]}]},{"id":"VRT013-B2","name":"Links and configuration","description":"How records are connected and kept consistent.","layers":[{"id":"VRT013-B2-L1","name":"Trace links","description":"Links between requirements, design, build and operation records.","findings":[{"id":"VRT013-F03","name":"Link integrity","description":"Whether links point to the right versions.","questions":[{"text":"Does each link point to a specific version of the target record?","id":"VRT013-Q05"},{"text":"Which links are broken or point to superseded versions?","id":"VRT013-Q06"}]},{"id":"VRT013-F04","name":"Configuration baseline","description":"The as-designed, as-built and as-maintained baselines.","questions":[{"text":"Which as-designed baseline does the as-built item correspond to?","id":"VRT013-Q07"},{"text":"Which changes after delivery are reflected in the as-maintained configuration?","id":"VRT013-Q08"}]}]}]},{"id":"VRT013-B3","name":"Access and use","description":"Who may follow the thread and for what.","layers":[{"id":"VRT013-B3-L1","name":"Access rights","description":"Access across organizational boundaries.","findings":[{"id":"VRT013-F05","name":"Cross-party access","description":"What suppliers, operators and authorities may see.","questions":[{"text":"Which parties may follow which links, under which agreement?","id":"VRT013-Q09"},{"text":"Which linked data is export-controlled or confidential?","id":"VRT013-Q10"}]}]}]}]},"agentConduct":{"may":["Follow thread links to trace a requirement to design, build and maintenance records.","Report broken links and version mismatches.","Assemble the configuration of a serial item from linked records.","Answer impact questions about a proposed change from the linked records."],"mustNot":["Change records in a source system through the thread without that system's authority.","Expose export-controlled or confidential design data to parties without access.","Fill gaps in traceability with assumed links presented as recorded.","Remove links needed for safety or airworthiness evidence."],"requiresHuman":["Accepting a configuration baseline for certification or delivery.","Granting a new party access to the thread."]},"ethics":{"considerations":["Broken traceability can hide safety-critical deviations in products people rely on.","Sharing threads across companies exposes intellectual property and controlled technology.","Operational data linked to people, such as maintenance staff, needs protection."],"affectedParties":["Users and operators of the product","Manufacturers and suppliers","Maintenance organizations","Safety regulators"]},"owners":{"steward":"The product owner or prime manufacturer that governs links across the lifecycle systems.","roles":[],"masterSystems":["Product lifecycle management system","Manufacturing execution system","Maintenance management system","Requirements management system"]},"relations":[{"target":"WM-VRT-001","type":"parent"}],"interaction":{"identity":{"applicability":"required","items":["Identified by the product or serial item identifier it threads, together with the owning organization.","Each link is identified by the identifiers and versions of the two records it connects."]},"properties":{"applicability":"not-applicable","items":[]},"recognition":{"applicability":"optional","items":["Recognized as a navigable set of version-specific links across lifecycle records of one subject.","Often confused with a digital twin, a product lifecycle management database or a document archive."]},"capabilities":{"applicability":"required","items":["Supports traceability from requirement to as-built and as-maintained item.","Supports change impact analysis across lifecycle stages.","Feeds digital twins with authoritative configuration data."]},"hazards":{"applicability":"required","items":["Unsafe products from broken or wrong traceability.","Leaks of controlled technology across organizations.","Decisions based on superseded versions."]},"interfaces":{"applicability":"required","items":["ISO 10303 STEP, including AP242, for product data exchange.","OASIS OSLC for lifecycle tool integration.","ISO 23247 digital twin framework for manufacturing."]},"context":{"applicability":"required","items":["Used in aerospace, defence, automotive and complex manufacturing.","Configuration management duties come from certification and contract requirements."]}},"sources":[{"title":"ISO 10303-242 Industrial automation systems and integration - Product data representation and exchange, ISO"},{"title":"Open Services for Lifecycle Collaboration (OSLC), OASIS"}],"openQuestions":["Planned model: boundary questions, research and every section remain to be written."],"resources":{"spec":"https://ver.cy/models/wm-vrt-013-digital-thread/spec.yaml","agents":"https://ver.cy/models/wm-vrt-013-digital-thread/AGENTS.md"},"provenance":{"origin":"planned (registry candidate)","builtFrom":["models/runtime-index.json","ver-cy/world-models/card-supplements/wm-vrt-013-digital-thread.json"],"providers":[],"researchStatus":"todo","generatedAt":"","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"not-applicable","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_":"Planned entry, hidden from the catalogue until researched.","interaction.properties":"The subject is an information or institutional record, not a physical object, so it has no physical properties to measure.","_supplement":"Sections authored in card supplement 1.0.0 by Claude (Opus 5.5) (2026-10-06, unreviewed). Written from the card's existing content and established practice in the field; no new sources were read. Unreviewed."},"score":1.0}}