Specification catalogue

Find the structure your AI needs.

A live registry of versioned meta-model specifications. Search by family, category, industry, domain, name or tags; storage formats and interfaces remain independent.

The catalogue holds the whole Thing Registry: every registered thing an agent might meet, marked TODO until its governed specification is written. AISMM, PLMM and prior World Model assemblies remain here as examples.
205 981 meta-models Priority first
Thing RegistryGenerated draft

biotite series

vr.tr.biotite-series
Physical world and living systems PHY.MAT
Thing RegistryGenerated draft

blender

vr.tr.blender
Physical world and living systems PHY.OBJ
Thing RegistryResearch draft

breakwater

vr.tr.breakwater

Let an agent explain breakwater types and design, describe their role in ports and coastal protection, support safety questions, and describe environmental effects.

Physical world and living systems PHY.BLT
Thing RegistryGenerated draft

buffer solution

vr.tr.buffer-solution
Physical world and living systems PHY.MAT
Thing RegistryGenerated draft

bulbourethral gland

vr.tr.bulbourethral-gland
Physical world and living systems PHY.LIV
Thing RegistryGenerated draft

Bunsen burner

vr.tr.bunsen-burner
Physical world and living systems PHY.OBJ
Thing RegistryResearch draft

bus stop

vr.tr.bus-stop

Let an agent explain bus stops and their types and features, support finding and using stops, describe planning, accessibility and safety standards, and support questions about st…

Physical world and living systems PHY.PLC
Thing RegistryGenerated draft

caduceus

vr.tr.caduceus
Physical world and living systems PHY.OBJ
Thing RegistryResearch draft

camera lens

vr.tr.camera-lens

Let an agent explain camera lenses and their properties and types, support choosing and using lenses for photographic purposes, describe optical design and quality, and describe t…

Physical world and living systems PHY.OBJ
Thing RegistryResearch draft

candidiasis

vr.tr.candidiasis

Let an agent explain candidiasis and its forms in general terms, relay causes, risk factors and treatment principles from clinical sources, identify when infection is serious, and…

Cross-cutting context XCT.QLT
Thing RegistryResearch draft

carbide

vr.tr.carbide

Let an agent explain carbides, relay classification, properties, uses and hazards from chemistry and materials sources, route exposure or fire to emergency services, describe the …

Physical world and living systems PHY.MAT
Thing RegistryGenerated draft

Carnot cycle

vr.tr.carnot-cycle
Activities and processes ACT.PRC
Thing RegistryGenerated draft

cellular network

vr.tr.cellular-network
Physical world and living systems PHY.OBJ
Thing RegistryGenerated draft

Cenchrus americanus

vr.tr.cenchrus-americanus
Physical world and living systems PHY.LIV
Thing RegistryGenerated draft

chandelier

vr.tr.chandelier
Physical world and living systems PHY.OBJ
Thing RegistryGenerated draft

Chavacano

vr.tr.chavacano
Information and virtual systems INF.MED
Thing RegistryResearch draft

Chinatown

vr.tr.chinatown

Let an agent explain Chinatowns as ethnic enclaves, relay their history, functions and change with attribution, describe regional variations, and route to entries for specific Chi…

Physical world and living systems PHY.PLC
Thing RegistryResearch draft

Chinese folk religion

vr.tr.chinese-folk-religion

Let an agent explain Chinese folk religion, relay beliefs, practices, history and contemporary status from religious studies and ethnographic sources with attribution, describe th…

Society, people and institutions SOC.ORG
Thing RegistryGenerated draft

choline

vr.tr.choline
Physical world and living systems PHY.MAT
Thing RegistryGenerated draft

Christian cross

vr.tr.christian-cross
Information and virtual systems INF.MED
Thing RegistryGenerated draft

Cichorium endivia

vr.tr.cichorium-endivia
Physical world and living systems PHY.LIV
Thing RegistryGenerated draft

clavichord

vr.tr.clavichord
Physical world and living systems PHY.OBJ
Thing RegistryGenerated draft

client

vr.tr.client
Physical world and living systems PHY.OBJ
Thing RegistryResearch draft

complex conjugate

vr.tr.complex-conjugate

Let an agent explain the complex conjugate and its properties, show how it is used in computation and theory, and support learning of complex numbers.

Cross-cutting context XCT.QTY
Thing RegistryGenerated draft

compromise

vr.tr.compromise
Information and virtual systems INF.MED
Thing RegistryGenerated draft

computational chemistry

vr.tr.computational-chemistry
Information and virtual systems INF.KNW
Thing RegistryGenerated draft

computer-generated imagery

vr.tr.computer-generated-imagery
Physical world and living systems PHY.OBJ
Thing RegistryGenerated draft

confirmation bias

vr.tr.confirmation-bias
Cross-cutting context XCT.STA
Thing RegistryGenerated draft

cooltooth enamel

vr.tr.cooltooth-enamel
Physical world and living systems PHY.MAT
Thing RegistryGenerated draft

D-sorbitol

vr.tr.d-sorbitol
Physical world and living systems PHY.MAT
Thing RegistryResearch draft

Danish Superliga

vr.tr.danish-superliga

Let an agent explain the Danish Superliga format and history, provide standings and results with sources, and support fans and analysts.

Activities and processes ACT.EVT
Thing RegistryGenerated draft

Dark Ages

vr.tr.dark-ages
Information and virtual systems INF.MED
Thing RegistryGenerated draft

devaluation

vr.tr.devaluation
Information and virtual systems INF.MED
Thing RegistryGenerated draft

display resolution

vr.tr.display-resolution
Information and virtual systems INF.MED
Thing RegistryGenerated draft

double-entry bookkeeping

vr.tr.double-entry-bookkeeping
Activities and processes ACT.ACT
Thing RegistryGenerated draft

drinking glass

vr.tr.drinking-glass
Physical world and living systems PHY.OBJ
Thing RegistryGenerated draft

drinking straw

vr.tr.drinking-straw
Physical world and living systems PHY.OBJ
Thing RegistryGenerated draft

earth

vr.tr.earth

the loose soft material that makes up a large part of the land surface

Physical world and living systems PHY.MAT
Thing RegistryGenerated draft

ecological succession

vr.tr.ecological-succession
Information and virtual systems INF.KNW
Thing RegistryResearch draft

edge

vr.tr.edge

Let an agent define edges in geometry and their counting relations, relate them to edges in graph theory, help compute edge counts and lengths, and separate the concept from unrel…

Cross-cutting context XCT.QLT
Thing RegistryGenerated draft

egg white

vr.tr.egg-white
Physical world and living systems PHY.MAT
Thing RegistryGenerated draft

Egyptians

vr.tr.egyptians
Society, people and institutions SOC.PER
Thing RegistryGenerated draft

electrical injury

vr.tr.electrical-injury
Activities and processes ACT.ACT
Thing RegistryGenerated draft

Eleocharis dulcis

vr.tr.eleocharis-dulcis
Physical world and living systems PHY.LIV
Thing RegistryGenerated draft

engraving process

vr.tr.engraving-process
Activities and processes ACT.ACT
Thing RegistryGenerated draft

eosinophil

vr.tr.eosinophil
Physical world and living systems PHY.OBJ
Thing RegistryGenerated draft

Eruca vesicaria subsp. sativa

vr.tr.eruca-vesicaria-subsp-sativa
Physical world and living systems PHY.LIV
Thing RegistryGenerated draft

Ethiopia men's national football team

vr.tr.ethiopia-men-s-national-football-team
Society, people and institutions SOC.ORG
Thing RegistryGenerated draft

exponential function

vr.tr.exponential-function
Cross-cutting context XCT.QLT
Thing RegistryResearch draft

fair

vr.tr.fair

Let an agent explain fairs and their kinds and history, describe how fairs are organised and regulated, support attending and exhibiting questions, and identify notable fairs with…

Activities and processes ACT.ACT
Thing RegistryGenerated draft

Fakir

vr.tr.fakir
Society, people and institutions SOC.PER
Thing RegistryGenerated draft

fiber

vr.tr.fiber

a slender and greatly elongated substance capable of being spun into yarn

Physical world and living systems PHY.MAT
Thing RegistryGenerated draft

filename extension

vr.tr.filename-extension
Information and virtual systems INF.MED
Thing RegistryGenerated draft

four-stroke engine

vr.tr.four-stroke-engine
Physical world and living systems PHY.OBJ
Thing RegistryGenerated draft

Fridays for Future

vr.tr.fridays-for-future
Activities and processes ACT.ACT
Thing RegistryGenerated draft

frying

vr.tr.frying
Activities and processes ACT.ACT
Thing RegistryGenerated draft

futures contract

vr.tr.futures-contract
Information and virtual systems INF.MED
Thing RegistryResearch draft

gambit

vr.tr.gambit

Let an agent explain gambits and their logic, identify major gambits and countergambits with their main lines from opening references, relay their history and modern assessment, a…

Cross-cutting context XCT.QLT
Thing RegistryGenerated draft

Game Boy Color

vr.tr.game-boy-color
Physical world and living systems PHY.OBJ
Thing RegistryGenerated draft

genetic algorithm

vr.tr.genetic-algorithm
Information and virtual systems INF.KNW