{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.classification-scheme","code":"thing-q5962346","url":"https://ver.cy/models/thing/q5962346/","name":"classification scheme","alternateNames":["vacuum tube designation system","scientific term","physics term","cartographic term","computer science term","geological term","chemical term","typology item","knowledge classification","safety classification","NFDI Conference Classification System","rock classification"],"kind":"thing","status":"research-draft","version":"0.2.0-wave.2","language":"en","classifiers":{"family":"Thing Registry","category":"Information and virtual systems","entryKind":"thing","plane":"INF","domain":["INF.KNW"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A structured system for organising things, concepts or terms into classes according to defined criteria, such as library classifications, taxonomies, industry and product codes, designation systems for components, and controlled vocabularies of scientific terms; classification schemes support retrieval, comparison and standardisation.","purpose":"Let an agent explain and apply classification schemes, choose or design a scheme for a purpose, and map between schemes.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Defined classes","Criteria for membership","Hierarchical or faceted","Maintained by an authority"],"structure":{"bundles":[{"id":"understand","name":"Understand","description":"How a scheme works.","layers":[{"id":"structure","name":"Structure","description":"Structure.","findings":[{"id":"structure-finding","name":"Structure","description":"Structure.","questions":[{"text":"How is this scheme structured, and what criteria define its classes?","kind":"definition"},{"text":"Who maintains it, and how is it versioned?","kind":"provenance"}]}]},{"id":"classify","name":"Classify","description":"Applying the scheme.","findings":[{"id":"classify-finding","name":"Classify","description":"Applying.","questions":[{"text":"Under which class does this item fall in the scheme?","kind":"definition"},{"text":"Is the assignment ambiguous?","kind":"boundary"}]}]}]},{"id":"choose","name":"Choose","description":"Selecting a scheme.","layers":[{"id":"select","name":"Select","description":"Which scheme.","findings":[{"id":"select-finding","name":"Select","description":"Selection.","questions":[{"text":"Which existing scheme suits this collection or purpose?","kind":"action"},{"text":"Should a hierarchical or faceted scheme be used?","kind":"boundary"}]}]},{"id":"design","name":"Design","description":"Designing a scheme.","findings":[{"id":"design-finding","name":"Design","description":"Design.","questions":[{"text":"How should a new classification scheme be designed and documented?","kind":"action"},{"text":"Which standards guide vocabulary design?","kind":"provenance"}]}]}]},{"id":"map","name":"Map","description":"Between schemes.","layers":[{"id":"mapping","name":"Mapping","description":"Mapping classes.","findings":[{"id":"mapping-finding","name":"Mapping","description":"Mapping.","questions":[{"text":"How does this class map to another scheme, and are the mappings exact or approximate?","kind":"definition"},{"text":"Which crosswalks exist?","kind":"provenance"}]}]},{"id":"terms","name":"Terms","description":"Term lists.","findings":[{"id":"terms-finding","name":"Terms","description":"Terms.","questions":[{"text":"Which controlled vocabulary defines this scientific or technical term?","kind":"provenance"},{"text":"How are terms updated?","kind":"provenance"}]}]}]},{"id":"examples","name":"Examples","description":"Notable schemes.","layers":[{"id":"cases","name":"Cases","description":"Well-known schemes.","findings":[{"id":"cases-finding","name":"Cases","description":"Examples.","questions":[{"text":"How do schemes such as library classifications, taxonomies and component designations differ?","kind":"provenance"},{"text":"What can be learned from their design?","kind":"provenance"}]}]},{"id":"limits","name":"Limits","description":"Limits of classification.","findings":[{"id":"limits-finding","name":"Limits","description":"Limits.","questions":[{"text":"Which things resist classification, and how do schemes handle them?","kind":"boundary"},{"text":"How is bias in classification addressed?","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Apply a classification scheme as documented by its maintainer, citing the version.","Map codes between schemes when the mapping is published."],"mustNot":["Invent codes or classes and present them as part of an official scheme.","Apply an outdated version without saying so.","Use a classification of people in a way that discriminates against them.","Change a shared scheme without the maintainer's process."],"requiresHuman":["Reclassifying records in ways that change tax, legal or benefit outcomes."]},"ethics":{"considerations":["Classifications shape what is seen and counted; biased categories marginalise people.","Wrong codes in trade, health or statistics have real financial and legal effects."],"affectedParties":["People classified by it","Users of the data","Maintainers of the scheme"]},"owners":{"steward":"The body that maintains each scheme.","roles":[],"masterSystems":["Official code lists of the maintaining bodies"]},"relations":[{"target":"Q12775893","type":"parent","note":"registry parent class"},{"target":"scheme","type":"related","note":"category"},{"target":"information science","type":"related","note":"field"},{"target":"cardinality","type":"related","note":"set concepts"},{"target":"encyclopedia","type":"related","note":"knowledge organisation"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.classification-scheme","Wikidata: Q5962346 (https://www.wikidata.org/wiki/Q5962346)"]},"properties":{"applicability":"not-applicable","items":[]},"recognition":{"applicability":"optional","items":["Classes with criteria","Codes or labels","A list without structure is not a scheme","Not physical; hierarchies, codes and vocabularies."]},"capabilities":{"applicability":"required","items":["explain how a scheme is structured","classify an item under a scheme","choose or design a scheme","map between schemes"]},"hazards":{"applicability":"required","items":["Ambiguous criteria","Outdated schemes","Mismapping between schemes"]},"interfaces":{"applicability":"required","items":["ISO 25964 on thesauri and vocabularies","Standards maintaining specific schemes"]},"context":{"applicability":"required","items":["Organising knowledge and things.","library classifications","scientific taxonomies","industry and product classifications","component designation systems","controlled vocabularies and term lists"]}},"sources":[],"openQuestions":["Should each major scheme be a separate entry?","How should scheme registries be linked?","How should mappings be maintained?"],"resources":{"spec":"/models/things/publications/thing-q5962346/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q5962346/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T20:18:39Z","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":"missing"},"notes":{"interaction.properties":"Plane INF: no invented physical properties.","sources":"Written from model knowledge without web access; claims are unverified."},"score":0.938}}