{ "model": { "rank": 3536, "code": "thing-q856", "model_id": "vr.tr.barcode", "name": "barcode", "purpose": "Let an agent explain barcodes and their symbologies, relay standards and encoding principles, describe applications in retail, logistics, healthcare and laboratories, and distinguish physical barcodes from molecular barcodes.", "family": "Thing Registry", "category": "Information and virtual systems", "status": "research-draft", "kind": "thing", "plane": "INF", "domain": "INF.KNW", "industry": "", "version": "", "url": "/models/thing/q856/", "tier": 2, "score": 84, "payload": { "layer": "wikidata", "aliases": [ "molecular barcode", "Composite-Code", "postal barcode", "Code One", "linear barcode", "multi-colored code", "Korean Postal Authority Code", "Postal Alpha Numeric Encoding Technique" ], "aliasCount": 8, "merged": 8, "knownIn": 84, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": null, "source": { "dataset": "wikidata", "item": "Q856", "url": "https://www.wikidata.org/wiki/Q856", "license": "CC0 1.0" } }, "research": { "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-12T23:49:22Z", "providers": [ "Claude" ], "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify", "pass": 2, "wave": 3, "engine": "claude" }, "metaModel": { "id": "THING-Q856", "registryId": "vr.tr.barcode", "name": "barcode", "version": "0.2.0-wave.3", "entryKind": "thing", "family": "Thing Registry", "domain": [ "INF.KNW" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q856/", "model": { "registry_id": "vr.tr.barcode", "name": "barcode", "purpose": "Let an agent explain barcodes and their symbologies, relay standards and encoding principles, describe applications in retail, logistics, healthcare and laboratories, and distinguish physical barcodes from molecular barcodes.", "definition": "A machine-readable representation of data as a pattern of bars, spaces, dots or modules printed on or attached to an object, read by optical scanners, in linear forms such as UPC, EAN and Code 128 and two-dimensional forms such as QR codes, Data Matrix, PDF417 and Code One, with specialised forms for postal sorting and composite and colour codes; barcodes identify products, parcels, documents and samples, and the term is also used for molecular barcodes in biology.", "what_it_is_for": "Encoding data for automatic identification.", "affordances": [ "explain symbologies and encoding", "relay standards", "describe applications", "distinguish from molecular barcodes" ], "distinguishing_features": [ "Optical encoding", "Standardised symbologies", "Error detection and correction", "Global identifier systems" ], "appearance": "A printed pattern of black bars or square modules with a number beneath in many cases.", "visual_identification": [ "Optical machine-readable pattern", "Linear and two-dimensional symbologies", "RFID tags are radio-based; molecular barcodes are DNA sequences" ], "physical_properties": [ { "quantity": "UPC introduced", "typical_range": "1974", "unit": "year", "note": "first retail scan" }, { "quantity": "QR code capacity", "typical_range": "up to about 7000", "unit": "digits", "note": "" } ], "families_and_kinds": [ "linear barcodes such as UPC, EAN, Code 39 and Code 128", "two-dimensional codes such as QR, Data Matrix, PDF417 and Code One", "postal barcodes", "composite and multi-colour codes", "molecular barcodes in biology, a related sense" ], "related_models": [ { "relation": "is a kind of", "target": "machine-readable data", "why": "in registry terms" }, { "relation": "is a kind of", "target": "code", "why": "in registry terms" }, { "relation": "encodes", "target": "identifier", "why": "such as GTINs" }, { "relation": "is read by", "target": "barcode scanner", "why": "the device" } ], "identifiers": [ { "scheme": "GS1 standards", "value_or_pattern": "GTIN and symbology specifications", "note": "" }, { "scheme": "ISO/IEC", "value_or_pattern": "15420, 18004 and others", "note": "symbology standards" } ], "standards_and_regulation": [ "GS1 general specifications", "ISO/IEC symbology standards", "Postal authority barcode standards", "Healthcare labelling regulations requiring barcodes" ], "failure_modes_and_hazards": [ "Misreads from print quality", "Counterfeit codes", "Malicious QR codes linking to harmful sites", "Confusing symbologies" ], "in_scope": [], "out_of_scope": [], "characteristics": [] }, "sources": [], "structure": { "bundles": [ { "id": "understand", "name": "Understand", "description": "How barcodes work.", "rationale": "Technology.", "layers": [ { "id": "encoding", "name": "Encoding", "description": "Encoding.", "findings": [ { "id": "encoding-finding", "name": "Encoding", "description": "Encoding.", "questions": [ { "text": "How do barcodes encode data, and how do scanners read them?", "kind": "definition" }, { "text": "Is the question about optical barcodes or molecular barcodes?", "kind": "boundary" } ] } ] }, { "id": "symbologies", "name": "Symbologies", "description": "Symbologies.", "findings": [ { "id": "symbologies-finding", "name": "Symbologies", "description": "Symbologies.", "questions": [ { "text": "What symbologies exist, and how do linear and two-dimensional codes differ?", "kind": "definition" }, { "text": "Which entry fits the specific symbology?", "kind": "action" } ] } ] } ] }, { "id": "standards", "name": "Standards", "description": "Standards and identifiers.", "rationale": "Regulation.", "layers": [ { "id": "gs1", "name": "GS1", "description": "GS1 and identifiers.", "findings": [ { "id": "gs1-finding", "name": "GS1", "description": "GS1.", "questions": [ { "text": "How do GS1 identifiers such as GTINs work with barcodes?", "kind": "provenance" }, { "text": "Which entry fits GTIN?", "kind": "action" } ] } ] }, { "id": "iso", "name": "ISO", "description": "ISO standards and quality.", "findings": [ { "id": "iso-finding", "name": "ISO", "description": "ISO.", "questions": [ { "text": "Which ISO standards define symbologies and print quality?", "kind": "provenance" }, { "text": "Which references are standard?", "kind": "provenance" } ] } ] } ] }, { "id": "apply", "name": "Apply", "description": "Applications.", "rationale": "Application.", "layers": [ { "id": "sectors", "name": "Sectors", "description": "Sectors.", "findings": [ { "id": "sectors-finding", "name": "Sectors", "description": "Sectors.", "questions": [ { "text": "How are barcodes used in retail, logistics, healthcare, libraries and laboratories?", "kind": "provenance" }, { "text": "Which entry fits the specific application?", "kind": "action" } ] } ] }, { "id": "security", "name": "Security", "description": "Security and risks.", "findings": [ { "id": "security-finding", "name": "Security", "description": "Security.", "questions": [ { "text": "What risks arise from malicious or counterfeit codes, and how are they mitigated?", "kind": "provenance" }, { "text": "Which sources are cited?", "kind": "provenance" } ] } ] } ] }, { "id": "context", "name": "Context", "description": "History and future.", "rationale": "Context.", "layers": [ { "id": "history", "name": "History", "description": "History.", "findings": [ { "id": "history-finding", "name": "History", "description": "History.", "questions": [ { "text": "How did barcodes develop from the 1949 patent to UPC and QR codes?", "kind": "provenance" }, { "text": "Which entry fits the history of automatic identification?", "kind": "action" } ] } ] }, { "id": "future", "name": "Future", "description": "Future.", "findings": [ { "id": "future-finding", "name": "Future", "description": "Future.", "questions": [ { "text": "How are two-dimensional codes and digital links changing product identification?", "kind": "provenance" }, { "text": "Which entry fits GS1 Digital Link?", "kind": "action" } ] } ] } ] } ] }, "openQuestions": [ "Should QR code and EAN be separate primary entries?", "How should GS1 and ISO standards be linked?", "The registry entry has merged aliases naming symbologies and molecular barcodes; should they be split off?" ], "statistics": { "bundles": 4, "layers": 8, "findings": 8, "questions": 16 } }, "draft": { "generator": "vr.draft.v3", "status": "draft-generated", "researched": false, "archetype": "discipline or field of knowledge", "method": "Written from the archetype playbook - what this kind of thing needs beyond identity and provenance - and from the structure that recurred across 6,333 models already researched by two engines. Applied to this entry by rule. No source was read for this thing and no claim here is researched. This entry carries no facets of its own, so they were inferred from its domain - a guess about a whole domain applied to one thing.", "facetsInferred": true, "nextPass": "A researcher replaces this draft with a sourced specification. Treat every sentence below as a proposal to argue with.", "purpose": "Give an agent a durable, checkable way to recognise a barcode, record what state it is in, and decide what may be done with it.", "whatItIs": "Let an agent explain barcodes and their symbologies, relay standards and encoding principles, describe applications in retail, logistics, healthcare and laboratories, and distinguish physical barcodes from molecular barcodes.", "characteristics": { "substance": "information", "origin": "conceptual", "agency": "inert" }, "whatYouCanDoWithIt": [ "read and interpreted" ], "distinguishingFeatures": [ "Names folded into this entry, which a task may need to split apart again: molecular barcode, Composite-Code, postal barcode, Code One, linear barcode, multi-colored code, Korean Postal Authority Code, Postal Alpha Numeric Encoding Technique.", "8 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.", "Described in 84 Wikipedia languages, which is a measure of how widely the thing is known, not of how important it is." ], "openQuestionsForResearch": [ "Which of the bundles below does a real task actually need, and which are ceremony?", "What does this thing have that the facets do not capture at all?", "Which neighbouring kind is most often confused with a barcode, and on what evidence are they told apart?" ], "whatItIsMadeOf": "content that has to be carried by something else", "physicalCharacter": [ "Does nothing on its own; everything it does, something else did to it.", "These come from the domain this entry sits in rather than from the entry itself, so treat them as a first guess about the whole domain applied to one thing." ], "whatCanBeDoneWithIt": [ "read it and act on what it says" ], "howItIsRecognised": [], "relatedModels": [ { "relation": "covers", "note": "Finer kinds folded into this entry because telling them apart needs a task that asks for it. Each is a model waiting to be split out when one does.", "targets": [ "molecular barcode", "Composite-Code", "postal barcode", "Code One", "linear barcode", "multi-colored code", "Korean Postal Authority Code", "Postal Alpha Numeric Encoding Technique" ] } ], "standing": "Described in 84 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 8 finer distinctions are held inside this entry as names rather than as separate models.", "structure": { "bundles": [ { "id": "identity-and-classification", "name": "Identity, naming and classification", "description": "How an agent tells one barcode from another, and a barcode from things that resemble it.", "rationale": "Recognition comes before every other claim. Without stable identity nothing else in the model can be trusted to be about the same thing twice.", "layers": [ { "id": "naming-and-identifiers", "name": "Names and identifiers", "description": "The names this thing goes by and the identifiers that survive translation and time.", "findings": [ { "id": "preferred-name-and-aliases", "name": "Preferred name, aliases and local names", "description": "Which name to use, which names mean the same thing, and which merely sound similar.", "questions": [ { "id": "preferred-name-and-aliases-q01", "text": "What identifies and describes the name of a barcode, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "preferred-name-and-aliases-q02", "text": "Who or what asserted this about the name of a barcode, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "preferred-name-and-aliases-q03", "text": "What may an agent decide or do once the name of a barcode is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "stable-identifiers", "name": "Stable identifiers and external keys", "description": "Identifiers that keep pointing at this kind of thing across systems and languages.", "questions": [ { "id": "stable-identifiers-q01", "text": "What identifies and describes an identifier for a barcode, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stable-identifiers-q02", "text": "Who or what asserted this about an identifier for a barcode, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stable-identifiers-q03", "text": "What may an agent decide or do once an identifier for a barcode is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "classification-and-granularity", "name": "Classification and granularity", "description": "Where a barcode sits among kinds, and how finely a task needs to cut it.", "findings": [ { "id": "kind-and-parents", "name": "Kind, parents and neighbouring kinds", "description": "The classes this thing belongs to and the ones it is next to.", "questions": [ { "id": "kind-and-parents-q01", "text": "What identifies and describes the kind of a barcode, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "kind-and-parents-q02", "text": "Who or what asserted this about the kind of a barcode, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "kind-and-parents-q03", "text": "What may an agent decide or do once the kind of a barcode is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "distinguishing-features", "name": "Distinguishing features", "description": "What separates a barcode from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a barcode, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "distinguishing-features-q02", "text": "Who or what asserted this about what distinguishes a barcode, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "distinguishing-features-q03", "text": "What may an agent decide or do once what distinguishes a barcode is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "state-and-lifecycle", "name": "State and lifecycle", "description": "The states a barcode passes through and the events that move it between them.", "rationale": "Most decisions about a thing depend on what state it is in now, which is a claim with a time on it, not a property.", "layers": [ { "id": "lifecycle-stages", "name": "Lifecycle stages", "description": "From coming into existence to ceasing to be one of these.", "findings": [ { "id": "stages-and-transitions", "name": "Stages and transitions", "description": "The stages worth naming and what moves a barcode between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a barcode, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stages-and-transitions-q02", "text": "Who or what asserted this about the lifecycle of a barcode, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stages-and-transitions-q03", "text": "What may an agent decide or do once the lifecycle of a barcode is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "observations-and-status", "name": "Observations and current status", "description": "What is observed about a barcode, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a barcode is recorded so that it can be superseded rather than overwritten.", "questions": [ { "id": "observation-record-q01", "text": "What identifies and describes an observation of a barcode, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "observation-record-q02", "text": "Who or what asserted this about an observation of a barcode, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "observation-record-q03", "text": "What may an agent decide or do once an observation of a barcode is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "content-and-access", "name": "Content, encoding and access", "description": "What a barcode says, how it is encoded and who may read it.", "rationale": "An informational thing carries content that can be copied, versioned and withheld, none of which its physical carrier explains.", "layers": [ { "id": "content-and-encoding", "name": "Content and encoding", "description": "The content itself, its format and its language.", "findings": [ { "id": "content-and-format", "name": "Content, format and language", "description": "What a barcode contains and in what form it is held.", "questions": [ { "id": "content-and-format-q01", "text": "What identifies and describes the content of a barcode, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "content-and-format-q02", "text": "Who or what asserted this about the content of a barcode, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "content-and-format-q03", "text": "What may an agent decide or do once the content of a barcode is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "access-and-rights", "name": "Access, rights and retention", "description": "Who may read, copy or change it, and for how long it is kept.", "findings": [ { "id": "access-rules", "name": "Access rules and retention", "description": "The permissions attached to a barcode and the period it survives.", "questions": [ { "id": "access-rules-q01", "text": "What identifies and describes access to a barcode, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "access-rules-q02", "text": "Who or what asserted this about access to a barcode, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "access-rules-q03", "text": "What may an agent decide or do once access to a barcode is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "subject-and-method", "name": "Subject matter and method", "description": "What barcode studies and how it establishes anything.", "rationale": "A field is identified by its questions and its methods, and those are what distinguish it from the fields next to it.", "layers": [ { "id": "subject", "name": "Subject matter", "description": "The questions it takes as its own.", "findings": [ { "id": "subject-record", "name": "Questions and objects of study", "description": "What it is about, stated so a neighbouring field can be told apart.", "questions": [ { "id": "subject-record-q01", "text": "What questions and objects does barcode take as its own?", "kind": "definition" }, { "id": "subject-record-q02", "text": "Which questions does it share with a neighbouring field, and who claims them?", "kind": "boundary" } ] } ] }, { "id": "method", "name": "Method and evidence", "description": "How claims are established and what counts as evidence.", "findings": [ { "id": "method-record", "name": "Methods and standards of evidence", "description": "The methods used and what they are taken to establish.", "questions": [ { "id": "method-record-q01", "text": "By what methods does barcode establish claims, and what counts as sufficient evidence?", "kind": "provenance" }, { "id": "method-record-q02", "text": "What kind of claim can this field not settle, and where should an agent look instead?", "kind": "action" } ] } ] } ] }, { "id": "institutions-and-classification", "name": "Institutions and classification", "description": "Where barcode is practised and how catalogues place it.", "rationale": "The institutional footprint is the evidence that a field exists as a field rather than as a topic.", "layers": [ { "id": "institutions", "name": "Institutional markers", "description": "Societies, journals, degrees and departments.", "findings": [ { "id": "institution-record", "name": "Bodies and venues", "description": "Where the field organises itself.", "questions": [ { "id": "institution-record-q01", "text": "Which societies, journals or degrees mark barcode as an established field?", "kind": "provenance" }, { "id": "institution-record-q02", "text": "What would show that it is emerging or dissolving rather than established?", "kind": "boundary" } ] } ] }, { "id": "classification", "name": "Classification schemes", "description": "Where library and research classifications put it.", "findings": [ { "id": "classification-record", "name": "Codes and their disagreements", "description": "The classification codes that place it, and where they differ.", "questions": [ { "id": "classification-record-q01", "text": "Which classification schemes place barcode, under what codes?", "kind": "definition" }, { "id": "classification-record-q02", "text": "Where do those schemes disagree about its scope?", "kind": "boundary" } ] } ] } ] }, { "id": "provenance-and-evidence", "name": "Provenance, evidence and time", "description": "Where every claim about a barcode came from and when it held.", "rationale": "A claim without a source and a time cannot be superseded, only overwritten, and an agent that overwrites loses the ability to explain itself.", "layers": [ { "id": "source-and-authority", "name": "Source and authority", "description": "Who said it, on what evidence, and how strongly.", "findings": [ { "id": "claim-provenance", "name": "Claim provenance and confidence", "description": "The authority behind each claim about a barcode and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a barcode, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "claim-provenance-q02", "text": "Who or what asserted this about a claim about a barcode, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "claim-provenance-q03", "text": "What may an agent decide or do once a claim about a barcode is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "time-and-versions", "name": "Time, versions and supersession", "description": "When a claim was true, when it was learnt, and what replaced it.", "findings": [ { "id": "validity-and-supersession", "name": "Validity period and supersession", "description": "How an old claim about a barcode is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a barcode, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "validity-and-supersession-q02", "text": "Who or what asserted this about the validity of a claim about a barcode, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "validity-and-supersession-q03", "text": "What may an agent decide or do once the validity of a claim about a barcode is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] } ] }, "statistics": { "bundles": 6, "layers": 12, "findings": 14, "questions": 38 } } } }