Entities and Primitives
Entities represent the named terms of OWL ontologies, and are modeled by CowlEntity
.
The term primitive has no correspondence in the OWL 2 specification.
It is used as a collective term for entities, anonymous individuals, and IRIs,
which are modeled by CowlPrimitive
. You can always safely cast CowlEntity
to CowlPrimitive
, while the opposite can only be done after checking that the primitive
is an OWL entity (see CowlPrimitive::cowl_primitive_is_entity()
).
-
struct CowlEntity : public CowlPrimitive
Represents an Entity in the OWL 2 specification.
Subclassed by CowlAnnotProp, CowlClass, CowlDataProp, CowlDatatype, CowlNamedInd, CowlObjProp
Public Functions
-
CowlEntityType cowl_entity_get_type(CowlAnyEntity *entity)
Gets the type of the entity.
- Parameters
entity – The entity.
- Returns
The type.
-
CowlIRI *cowl_entity_get_iri(CowlAnyEntity *entity)
Gets the IRI of the entity.
- Parameters
entity – The entity.
- Returns
The IRI.
-
bool cowl_entity_is_reserved(CowlAnyEntity *entity)
Checks whether the entity is reserved, i.e.
if its IRI is in the reserved vocabulary.
- Parameters
entity – The entity.
- Returns
True if the entity is reserved, false otherwise.
-
ulib_uint cowl_entity_get_id(CowlAnyEntity *entity)
Gets the increasing unique identifier associated to the specified entity.
Note
Only available if COWL_ENTITY_IDS is defined. Enabling this API ensures entities are tracked and given a numeric identifier for the lifetime of the executable, which can be a useful property to have in some applications. Bear in mind that this also means entities are never deallocated, which can affect memory usage.
- Parameters
entity – The entity.
- Returns
Unique identifier.
-
CowlAnyEntity *cowl_entity_with_id(ulib_uint id)
Returns the entity that has the specified identifier.
See also
Note
Only available if COWL_ENTITY_IDS is defined.
- Parameters
id – Unique identifier.
- Returns
Entity with the specified identifier, or NULL if no entity has the specified identifier.
-
CowlEntityType cowl_entity_get_type(CowlAnyEntity *entity)
-
enum CowlEntityType
Represents the type of CowlEntity.
Values:
-
enumerator COWL_ET_OBJ_PROP
CowlObjProp - object property.
-
enumerator COWL_ET_DATA_PROP
CowlDataProp - data property.
-
enumerator COWL_ET_ANNOT_PROP
CowlAnnotProp - annotation property.
-
enumerator COWL_ET_NAMED_IND
CowlNamedInd - named individual.
-
enumerator COWL_ET_DATATYPE
CowlDatatype - datatype.
-
enumerator COWL_ET_COUNT
Number of enum values.
-
enumerator COWL_ET_FIRST
First enum value.
-
enumerator COWL_ET_OBJ_PROP
-
struct CowlPrimitive : public CowlObject
Represents a primitive, a collective term for entities, anonymous individuals, and IRIs.
Subclassed by CowlAnonInd, CowlEntity, CowlIndividual
Public Functions
-
CowlPrimitiveType cowl_primitive_get_type(CowlAnyPrimitive *primitive)
Gets the type of the primitive.
- Parameters
primitive – The primitive.
- Returns
The type.
-
bool cowl_primitive_is_entity(CowlAnyPrimitive *primitive)
Checks whether the primitive is an entity.
- Parameters
primitive – The primitive.
- Returns
True if the primitive is an entity,
-
CowlPrimitiveType cowl_primitive_get_type(CowlAnyPrimitive *primitive)
-
enum CowlPrimitiveType
Represents the type of CowlPrimitive.
Values:
-
enumerator COWL_PT_OBJ_PROP
CowlObjProp - object property.
-
enumerator COWL_PT_DATA_PROP
CowlDataProp - data property.
-
enumerator COWL_PT_ANNOT_PROP
CowlAnnotProp - annotation property.
-
enumerator COWL_PT_NAMED_IND
CowlNamedInd - named individual.
-
enumerator COWL_PT_ANON_IND
CowlAnonInd - anonymous individual.
-
enumerator COWL_PT_DATATYPE
CowlDatatype - datatype.
-
enumerator COWL_PT_COUNT
Number of enum values.
-
enumerator COWL_PT_FIRST
First enum value.
-
enumerator COWL_PT_OBJ_PROP