Terms and model resources

Use these indexes when you know the kind of resource you need or want to resolve an ontology identifier. They separate classes, relationships, literal value spaces and controlled vocabularies so that a coded value is not mistaken for a class and a SHACL constraint is not mistaken for an OWL statement.

schema-derived draft

The terms indexed here belong to the committed schema-derived draft corpus. Stable identifiers and reproducible pages do not make the corpus an approved SPDTF ontology. Every detail page retains its recorded definition, provenance and maturity.

Choose the right index

If you need…	Use…	Why
A kind of thing	Classes	OWL classes carry identity and classification commitments.
A relationship or literal field	Properties	Object and datatype properties show subjects, objects, ranges and constraints.
A literal value space	Datatypes	Datatypes describe lexical values such as strings, dates and numbers.
A governed coded value	Vocabularies	SKOS schemes carry enumerations and controlled concepts outside class trees.
A known name without its kind	Index and glossary	The A–Z index spans all model-resource kinds and links to canonical detail pages.

Browse model resources

Relationship overview

Interactive graph

Explore the OWL class backbone by module and neighbourhood before opening exact resource pages.

Open page OWL resources

Classes

Browse all 41 OWL classes—Substance Kinds, Roles, RoleMixins and Relators—by module, with definitions, diagrams, relationships, UFO stereotypes and canonical links.

Open page Classification facet

UFO categories

Inspect the inert opda:ufoCategory documentary facet and the OWL classes grouped under each UFO-informed category; the corpus is UFO-informed, not UFO-grounded.

Open page Relationships and values

Properties

Find all 73 object and 203 datatype properties with their domains, ranges, constraints, inverses and source provenance.

Open page Literal value spaces

Datatypes

See every literal datatype used by the corpus and the datatype properties that range over it.

Open page SKOS resources

Controlled vocabularies

Browse the 46 SKOS concept schemes and 304 coded concepts without turning controlled values into OWL subclasses.

Open page A–Z discovery

Index and glossary

Search across classes, properties, shapes, concepts and schemes, then open each resource at its dereferenceable /pdtf page.

Open page

Canonical detail pages

Index entries resolve to stable /pdtf/** pages containing the resource identity, definition, relationships, constraints and source citations. Those pages are the detailed rendering of this draft corpus; the indexes above remain the task-oriented ways to discover them. For architectural interpretation, return to Concepts and architecture.