Glossary

Term	Definition
SPARQLModel	Subclass of pydantic.BaseModel with rdf_type, Field, and Relationship metadata; validated on construct and on load (extra="forbid").
HydrationError	ORM error when graph data cannot be coerced into a SPARQLModel (wraps Pydantic ValidationError).
SPARQLSession	Unit of work over a Store; entry point for put, get, query.
Store	Backend abstraction (MemoryStore, HttpStore) holding or proxying an RDF graph.
Composition	Nested SPARQLModel owned by a root; cascade delete and orphan cleanup on put.
Reference	IRI or Relationship(cascade=False); root does not own target triples.
Identity map	Session cache returning the same Python instance for an IRI at depth=0.
Flush queue	Pending put(..., flush=False) writes applied on flush() or context exit.
Hydration	Loading fields and relationships from the graph into model instances (depth 0–2).
Mirror	Local triplemodel.Store inside HttpStore used for get and cascade.
TripleModel	Required mapping library (triplemodel); literals, terms, file parse/serialize.
Orphan cleanup	Removing stale owned triples when relationships or values change on put.

See also SparqlModel (ORM) + TripleModel (mapping engine) for package boundaries.