{ "model": { "rank": 8816, "code": "thing-q210861", "model_id": "vr.tr.cell-differentiation", "name": "cell differentiation", "purpose": "Let an agent handle cell differentiation by cell type, pathway, research use and regulation of stem cell applications.", "family": "Thing Registry", "category": "Activities and processes", "status": "research-draft", "kind": "thing", "plane": "ACT", "domain": "ACT.PRC", "industry": "", "version": "", "url": "/models/thing/q210861/", "tier": 2, "score": 49, "payload": { "layer": "wikidata", "aliases": [ "embryonic stem cell differentiation", "gametogenesis", "vasculogenesis", "glial cell differentiation", "neurogenesis", "myoblast differentiation", "myeloid cell differentiation", "epithelial cell differentiation", "fat cell differentiation", "cell differentiation involved in embryonic placenta development", "muscle cell differentiation", "skeletal muscle cell differentiation", "trophectodermal cell differentiation", "stem cell differentiation", "osteoblast differentiation", "chondrocyte differentiation", "mesenchymal cell differentiation", "cell differentiation involved in kidney development", "neuron differentiation", "lung cell differentiation", "cell differentiation in hindbrain", "cardiocyte differentiation", "corticotropin hormone secreting cell differentiation", "hematopoietic progenitor cell differentiation", "tendon cell differentiation", "mesodermal cell differentiation", "Leydig cell differentiation", "spermatid differentiation", "somatotropin secreting cell differentiation", "neuroblast differentiation", "endodermal cell differentiation", "Prosoplasia", "chondroblast differentiation", "ectodermal cell differentiation", "chorionic trophoblast cell differentiation", "oocyte differentiation", "cell differentiation involved in salivary gland development", "prolactin secreting cell differentiation", "leukocyte differentiation", "hypothalamus cell differentiation" ], "aliasCount": 100, "merged": 100, "knownIn": 49, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": null, "source": { "dataset": "wikidata", "item": "Q210861", "url": "https://www.wikidata.org/wiki/Q210861", "license": "CC0 1.0" } }, "research": { "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-11T09:36:59Z", "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": 1, "engine": "claude" }, "metaModel": { "id": "THING-Q210861", "registryId": "vr.tr.cell-differentiation", "name": "cell differentiation", "version": "0.2.0-wave.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "ACT.PRC" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q210861/", "model": { "registry_id": "vr.tr.cell-differentiation", "name": "cell differentiation", "purpose": "Let an agent handle cell differentiation by cell type, pathway, research use and regulation of stem cell applications.", "definition": "The process by which a less specialised cell becomes a more specialised cell type, such as stem cells becoming neurons, muscle or blood cells, controlled by gene expression and signals.", "what_it_is_for": "Development, tissue repair and biomedical research.", "affordances": [ "explain differentiation pathways", "identify cell types and markers", "understand stem cell research", "check regulation of stem cell therapies" ], "distinguishing_features": [ "Specialisation of cells", "Driven by gene regulation", "Usually stable but can be reprogrammed", "Central to development" ], "appearance": "Seen under the microscope as changes in cell shape, markers and function.", "visual_identification": [ "Marker proteins and gene expression", "Lineage trees", "Differentiation in mathematics is a different sense" ], "physical_properties": [], "families_and_kinds": [ "embryonic differentiation", "neurogenesis", "haematopoiesis", "myogenesis", "gametogenesis" ], "related_models": [ { "relation": "is a kind of", "target": "cellular developmental process", "why": "category" }, { "relation": "starts from", "target": "stem cell", "why": "origin" }, { "relation": "produces", "target": "cell type", "why": "result" }, { "relation": "is confused with", "target": "differentiation (calculus)", "why": "another sense" } ], "identifiers": [ { "scheme": "Gene Ontology", "value_or_pattern": "GO:0030154", "note": "process term" } ], "standards_and_regulation": [ "ISSCR guidelines for stem cell research", "Advanced therapy medicinal product regulation" ], "failure_modes_and_hazards": [ "Promoting unproven stem cell clinics", "Overstating research results" ], "in_scope": [], "out_of_scope": [], "characteristics": [] }, "sources": [], "structure": { "bundles": [ { "id": "process", "name": "Process", "description": "Which differentiation.", "rationale": "Lineages differ.", "layers": [ { "id": "lineage", "name": "Lineage", "description": "Cell type.", "findings": [ { "id": "lineage-finding", "name": "Lineage", "description": "Lineage.", "questions": [ { "text": "Which cell lineage is involved?", "kind": "definition" }, { "text": "From which progenitor?", "kind": "definition" } ] } ] }, { "id": "signals", "name": "Signals", "description": "Regulation.", "findings": [ { "id": "signals-finding", "name": "Signals", "description": "Regulation.", "questions": [ { "text": "Which signals and genes drive it?", "kind": "provenance" }, { "text": "How well established is it?", "kind": "boundary" } ] } ] } ] }, { "id": "evidence", "name": "Evidence", "description": "Markers.", "rationale": "Markers show differentiation.", "layers": [ { "id": "markers", "name": "Markers", "description": "Proteins.", "findings": [ { "id": "markers-finding", "name": "Markers", "description": "Markers.", "questions": [ { "text": "Which markers confirm the cell type?", "kind": "measurement" }, { "text": "How were they measured?", "kind": "provenance" } ] } ] }, { "id": "reprogramming", "name": "Reprogramming", "description": "Reversal.", "findings": [ { "id": "reprogramming-finding", "name": "Reprogramming", "description": "Reprogramming.", "questions": [ { "text": "Can the cells be reprogrammed, as in induced pluripotent stem cells?", "kind": "definition" }, { "text": "Which studies show it?", "kind": "provenance" } ] } ] } ] }, { "id": "therapy", "name": "Therapy", "description": "Clinical use.", "rationale": "Therapies are regulated.", "layers": [ { "id": "approved", "name": "Approved", "description": "Approved therapies.", "findings": [ { "id": "approved-finding", "name": "Approved", "description": "Approved therapies.", "questions": [ { "text": "Is this stem cell therapy approved by a regulator?", "kind": "provenance" }, { "text": "For which condition?", "kind": "provenance" } ] } ] }, { "id": "clinics", "name": "Clinics", "description": "Unproven offers.", "findings": [ { "id": "clinics-finding", "name": "Clinics", "description": "Unproven clinics.", "questions": [ { "text": "Is a clinic offering unproven stem cell treatments?", "kind": "boundary" }, { "text": "Where can patients check approvals?", "kind": "action" } ] } ] } ] }, { "id": "research", "name": "Research", "description": "Lab use.", "rationale": "Research uses differentiation.", "layers": [ { "id": "models", "name": "Models", "description": "Organoids.", "findings": [ { "id": "models-finding", "name": "Models", "description": "Research models.", "questions": [ { "text": "How are differentiated cells used in research models?", "kind": "definition" }, { "text": "What are their limits?", "kind": "boundary" } ] } ] }, { "id": "ethics", "name": "Ethics", "description": "Guidelines.", "findings": [ { "id": "ethics-finding", "name": "Ethics", "description": "Research ethics.", "questions": [ { "text": "Which ethical guidelines apply to this research?", "kind": "provenance" }, { "text": "Is embryo research involved?", "kind": "boundary" } ] } ] } ] } ] }, "openQuestions": [ "Should each lineage be a separate entry?", "How should Gene Ontology terms be linked?", "How should unproven therapies be flagged?" ], "statistics": { "bundles": 4, "layers": 8, "findings": 8, "questions": 16 } }, "draft": { "generator": "vr.draft.v3", "status": "draft-generated", "researched": false, "archetype": "abstract concept", "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 cell differentiation, record what state it is in, and decide what may be done with it.", "whatItIs": "Let an agent handle cell differentiation by cell type, pathway, research use and regulation of stem cell applications.", "characteristics": { "substance": "activity", "origin": "conceptual", "agency": "inert" }, "whatYouCanDoWithIt": [ "observed and measured" ], "distinguishingFeatures": [ "Names folded into this entry, which a task may need to split apart again: embryonic stem cell differentiation, gametogenesis, vasculogenesis, glial cell differentiation, neurogenesis, myoblast differentiation, myeloid cell differentiation, epithelial cell differentiation, fat cell differentiation, cell differentiation involved in embryonic placenta development, muscle cell differentiation, skeletal muscle cell differentiation.", "100 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.", "Described in 49 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 cell differentiation, and on what evidence are they told apart?" ], "whatItIsMadeOf": "something that happens over time", "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": [ "observe it, measure it, record its state" ], "howItIsRecognised": [ "Nothing to see. What is recognised is an instance of it, and which instances count is exactly what is argued about." ], "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": [ "embryonic stem cell differentiation", "gametogenesis", "vasculogenesis", "glial cell differentiation", "neurogenesis", "myoblast differentiation", "myeloid cell differentiation", "epithelial cell differentiation", "fat cell differentiation", "cell differentiation involved in embryonic placenta development", "muscle cell differentiation", "skeletal muscle cell differentiation" ] } ], "standing": "Described in 49 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 100 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 cell differentiation from another, and a cell differentiation 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 cell differentiation, 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 cell differentiation, 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 cell differentiation 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 cell differentiation, 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 cell differentiation, 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 cell differentiation 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 cell differentiation 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 cell differentiation, 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 cell differentiation, 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 cell differentiation 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 cell differentiation from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a cell differentiation, 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 cell differentiation, 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 cell differentiation 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 cell differentiation 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 cell differentiation between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a cell differentiation, 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 cell differentiation, 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 cell differentiation 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 cell differentiation, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a cell differentiation 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 cell differentiation, 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 cell differentiation, 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 cell differentiation is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "process-and-outcome", "name": "Process, inputs and outcome", "description": "How a cell differentiation proceeds, what it needs and what it leaves behind.", "rationale": "An activity is known by its steps and its results, and both have to be recordable while it is still running.", "layers": [ { "id": "steps-and-sequence", "name": "Steps and sequence", "description": "The steps of a cell differentiation, their order and what may run in parallel.", "findings": [ { "id": "steps-and-preconditions", "name": "Steps, preconditions and completion", "description": "What has to be true before each step of a cell differentiation and what marks it done.", "questions": [ { "id": "steps-and-preconditions-q01", "text": "What identifies and describes a step of a cell differentiation, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "steps-and-preconditions-q02", "text": "Who or what asserted this about a step of a cell differentiation, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "steps-and-preconditions-q03", "text": "What may an agent decide or do once a step of a cell differentiation is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "inputs-and-results", "name": "Inputs, resources and results", "description": "What a cell differentiation consumes and what it produces.", "findings": [ { "id": "inputs-and-outputs", "name": "Inputs, outputs and side effects", "description": "The resources a cell differentiation takes and the results it leaves, wanted or not.", "questions": [ { "id": "inputs-and-outputs-q01", "text": "What identifies and describes the inputs and results of a cell differentiation, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "inputs-and-outputs-q02", "text": "Who or what asserted this about the inputs and results of a cell differentiation, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "inputs-and-outputs-q03", "text": "What may an agent decide or do once the inputs and results of a cell differentiation is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "definitions-in-contest", "name": "Definitions and who holds them", "description": "What cell differentiation is taken to mean, and by whom.", "rationale": "When a field disagrees about a concept, the disagreement is the content. A model that picks one definition silently destroys the information.", "layers": [ { "id": "competing-definitions", "name": "Competing definitions", "description": "The main readings and the traditions behind them.", "findings": [ { "id": "definition-map", "name": "Definitions and their holders", "description": "Each definition with the school or body that holds it.", "questions": [ { "id": "definition-map-q01", "text": "Which definitions of cell differentiation are in use, and which tradition or body holds each?", "kind": "definition" }, { "id": "definition-map-q02", "text": "What turns on the difference between them in practice?", "kind": "boundary" } ] } ] }, { "id": "operationalisation", "name": "Operationalisation", "description": "How it is measured or applied when it has to be.", "findings": [ { "id": "operational-record", "name": "Measures and proxies", "description": "Instruments and indicators used to stand in for it.", "questions": [ { "id": "operational-record-q01", "text": "How is cell differentiation operationalised or measured in practice, and by what instrument?", "kind": "measurement" }, { "id": "operational-record-q02", "text": "What does that operationalisation leave out, and when does that matter?", "kind": "boundary" } ] } ] } ] }, { "id": "instances-and-use", "name": "Instances, use and consequence", "description": "What counts as an instance of cell differentiation and what follows from calling something that.", "rationale": "Applying a concept is an act with consequences, so a model must say what the label licenses and what it does not.", "layers": [ { "id": "instances", "name": "What counts as an instance", "description": "Clear cases, borderline cases and non-cases.", "findings": [ { "id": "instance-tests", "name": "Tests for an instance", "description": "What would settle whether something falls under it.", "questions": [ { "id": "instance-tests-q01", "text": "What would settle whether something is an instance of cell differentiation?", "kind": "boundary" }, { "id": "instance-tests-q02", "text": "Which borderline cases are argued about, and on what grounds?", "kind": "definition" } ] } ] }, { "id": "consequence", "name": "Consequence of application", "description": "Rights, duties or decisions that follow from the label.", "findings": [ { "id": "consequence-record", "name": "What the label licenses", "description": "What an agent may do once something is classified this way.", "questions": [ { "id": "consequence-record-q01", "text": "What follows practically once something is treated as cell differentiation?", "kind": "action" }, { "id": "consequence-record-q02", "text": "What must an agent not infer from the label alone?", "kind": "action" } ] } ] } ] }, { "id": "provenance-and-evidence", "name": "Provenance, evidence and time", "description": "Where every claim about a cell differentiation 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 cell differentiation and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a cell differentiation, 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 cell differentiation, 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 cell differentiation 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 cell differentiation is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a cell differentiation, 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 cell differentiation, 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 cell differentiation 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 } } } }