{ "model": { "rank": 4449, "code": "thing-q199602", "model_id": "vr.tr.itch", "name": "itch", "purpose": "Let an agent explain itch and its causes and mechanisms, relay general self-care and when-to-seek-care guidance from health bodies, describe treatment approaches in general terms, and route personal medical questions to clinicians.", "family": "Thing Registry", "category": "Information and virtual systems", "status": "research-draft", "kind": "thing", "plane": "INF", "domain": "INF.KNW", "industry": "", "version": "", "url": "/models/thing/q199602/", "tier": 2, "score": 75, "payload": { "layer": "wikidata", "aliases": [ "Copra itch", "post-burn pruritus", "pruritus ani", "itching dermatitis", "biliary pruritus", "Brachioradial pruritus", "Drug-induced pruritus", "HIV-associated pruritus", "Hydroxyethyl starch-induced pruritus", "aquagenic pruritus", "Prion pruritus", "Pruritus scroti", "Pruritus vulvae", "psychogenic pruritus", "Puncta pruritica", "Referred itch", "Scalp pruritus", "Senile pruritus", "Uremic pruritus", "Cholestatic pruritus", "Aquadynia" ], "aliasCount": 21, "merged": 21, "knownIn": 75, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": null, "source": { "dataset": "wikidata", "item": "Q199602", "url": "https://www.wikidata.org/wiki/Q199602", "license": "CC0 1.0" } }, "research": { "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-12T02:41:47Z", "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": 2, "engine": "claude" }, "metaModel": { "id": "THING-Q199602", "registryId": "vr.tr.itch", "name": "itch", "version": "0.2.0-wave.2", "entryKind": "thing", "family": "Thing Registry", "domain": [ "INF.KNW" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q199602/", "model": { "registry_id": "vr.tr.itch", "name": "itch", "purpose": "Let an agent explain itch and its causes and mechanisms, relay general self-care and when-to-seek-care guidance from health bodies, describe treatment approaches in general terms, and route personal medical questions to clinicians.", "definition": "An unpleasant skin sensation that provokes the desire to scratch, known medically as pruritus, arising from skin conditions such as eczema and dermatitis, infestations and contact with irritants, from systemic causes such as liver, kidney and blood disorders, from nerve-related causes such as brachioradial pruritus, and from healing burns, and occurring in localised forms such as anal pruritus; itch is a common symptom assessed by cause and treated with skin care, medicines and management of the underlying condition.", "what_it_is_for": "The symptom of itching.", "affordances": [ "explain causes and mechanisms", "relay self-care guidance", "describe treatments generally", "route personal questions" ], "distinguishing_features": [ "Symptom not disease", "Many causes", "Itch-scratch cycle", "Localised or generalised" ], "appearance": "Not visible; a sensation, sometimes with scratch marks or rash.", "visual_identification": [ "Sensation provoking scratching", "Skin, systemic or nerve causes", "Pain and tingling are related but distinct sensations" ], "physical_properties": [], "families_and_kinds": [ "itch from skin conditions", "itch from infestations and contact", "systemic itch such as biliary and renal pruritus", "neuropathic itch", "localised itch such as anal pruritus" ], "related_models": [ { "relation": "is a kind of", "target": "symptom", "why": "category" }, { "relation": "is a kind of", "target": "somatosensory disorder", "why": "category" }, { "relation": "is related to", "target": "headache", "why": "another symptom entry" }, { "relation": "is related to", "target": "scar", "why": "itch in healing skin" } ], "identifiers": [], "standards_and_regulation": [ "Clinical guidelines on pruritus", "Medicines regulation for antipruritics", "Public health guidance on infestations" ], "failure_modes_and_hazards": [ "Agents giving personal diagnostic advice", "Missing serious underlying causes", "Skin damage from scratching" ], "in_scope": [], "out_of_scope": [], "characteristics": [] }, "sources": [], "structure": { "bundles": [ { "id": "understand", "name": "Understand", "description": "What itch is.", "rationale": "General information.", "layers": [ { "id": "mechanism", "name": "Mechanism", "description": "Mechanisms.", "findings": [ { "id": "mechanism-finding", "name": "Mechanism", "description": "Mechanisms.", "questions": [ { "text": "How does itch arise in the skin and nervous system, and how does the itch-scratch cycle work?", "kind": "definition" }, { "text": "Is the user asking about their own symptoms, which need a clinician?", "kind": "boundary" } ] } ] }, { "id": "causes", "name": "Causes", "description": "Causes.", "findings": [ { "id": "causes-finding", "name": "Causes", "description": "Causes.", "questions": [ { "text": "What skin, systemic, neurological and other causes of itch exist, according to health bodies?", "kind": "provenance" }, { "text": "Which entry fits a specific condition?", "kind": "action" } ] } ] } ] }, { "id": "care", "name": "Care", "description": "Self-care and treatment.", "rationale": "Guidance.", "layers": [ { "id": "selfcare", "name": "Self-care", "description": "Self-care.", "findings": [ { "id": "selfcare-finding", "name": "Self-care", "description": "Self-care.", "questions": [ { "text": "What self-care measures do health bodies recommend for mild itch?", "kind": "provenance" }, { "text": "Which entry fits skin care?", "kind": "action" } ] } ] }, { "id": "seek", "name": "Seek", "description": "When to seek care.", "findings": [ { "id": "seek-finding", "name": "Seek", "description": "Seeking care.", "questions": [ { "text": "When does itch warrant medical assessment, according to health guidance?", "kind": "provenance" }, { "text": "Is urgent care needed now, for example with breathing difficulty or jaundice?", "kind": "boundary" } ] } ] } ] }, { "id": "treat", "name": "Treat", "description": "Treatment approaches.", "rationale": "General information.", "layers": [ { "id": "treatments", "name": "Treatments", "description": "Treatments.", "findings": [ { "id": "treatments-finding", "name": "Treatments", "description": "Treatments.", "questions": [ { "text": "What treatments exist for itch, from emollients and antihistamines to treatments of underlying disease, in general terms?", "kind": "provenance" }, { "text": "Which entry fits a specific medicine?", "kind": "action" } ] } ] }, { "id": "special", "name": "Special", "description": "Special situations.", "findings": [ { "id": "special-finding", "name": "Special", "description": "Special.", "questions": [ { "text": "How is itch managed in pregnancy, older people, burns and chronic disease, according to guidelines?", "kind": "provenance" }, { "text": "Which entry fits a specific situation?", "kind": "action" } ] } ] } ] }, { "id": "learn", "name": "Learn", "description": "Research and teaching.", "rationale": "Education.", "layers": [ { "id": "research", "name": "Research", "description": "Research.", "findings": [ { "id": "research-finding", "name": "Research", "description": "Research.", "questions": [ { "text": "What does research say about itch pathways and new treatments?", "kind": "provenance" }, { "text": "Which references are standard?", "kind": "provenance" } ] } ] }, { "id": "teach", "name": "Teach", "description": "Teaching.", "findings": [ { "id": "teach-finding", "name": "Teach", "description": "Teaching.", "questions": [ { "text": "How can itch be taught in dermatology and nursing?", "kind": "action" }, { "text": "Which misconceptions arise?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Should each cause be a separate entry?", "How should health guidance be linked?", "How should dermatology resources be linked?" ], "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 itch, record what state it is in, and decide what may be done with it.", "whatItIs": "Let an agent explain itch and its causes and mechanisms, relay general self-care and when-to-seek-care guidance from health bodies, describe treatment approaches in general terms, and route personal medical questions to clinicians.", "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: Copra itch, post-burn pruritus, pruritus ani, itching dermatitis, biliary pruritus, Brachioradial pruritus, Drug-induced pruritus, HIV-associated pruritus, Hydroxyethyl starch-induced pruritus, aquagenic pruritus, Prion pruritus, Pruritus scroti.", "21 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.", "Described in 75 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 itch, 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": [ "Copra itch", "post-burn pruritus", "pruritus ani", "itching dermatitis", "biliary pruritus", "Brachioradial pruritus", "Drug-induced pruritus", "HIV-associated pruritus", "Hydroxyethyl starch-induced pruritus", "aquagenic pruritus", "Prion pruritus", "Pruritus scroti" ] } ], "standing": "Described in 75 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 21 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 itch from another, and a itch 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 itch, 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 itch, 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 itch 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 itch, 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 itch, 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 itch 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 itch 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 itch, 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 itch, 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 itch 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 itch from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a itch, 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 itch, 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 itch 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 itch 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 itch between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a itch, 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 itch, 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 itch 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 itch, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a itch 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 itch, 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 itch, 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 itch 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 itch 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 itch contains and in what form it is held.", "questions": [ { "id": "content-and-format-q01", "text": "What identifies and describes the content of a itch, 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 itch, 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 itch 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 itch and the period it survives.", "questions": [ { "id": "access-rules-q01", "text": "What identifies and describes access to a itch, 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 itch, 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 itch 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 itch 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 itch 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 itch 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 itch 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 itch 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 itch, 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 itch 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 itch and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a itch, 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 itch, 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 itch 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 itch is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a itch, 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 itch, 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 itch 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 } } } }