Semantic Web-Based Information Systems: State-of-the-Art ...

Semant c Web of Language Eng neer ng
Figure 3. Relationships among some General Multimedia Ontology classes (UML
class diagram)
or an OntologyAnnotation. StringAnnotation represents any string that a user can
input as an annotation value, but values, represented by OntologyAnnotation, come
from a language profile and, consequently, from an ontology. Note that the General
Multimedia Ontology allows Ontology Annotation to be used only with ReferringAnnotation.
In other words, tiers with AlignableAnnotations do not support an
ontology-based approach. This limitation is due to software development issues
— OntoELAN does not support annotation with ontological terms in alignable tiers.
We intentionally emphasize this constraint in the ontology, although conceptually
it should not be the case.
Among our contributions is the introduction of the OWL class Ontology Annotation,
which serves as an annotation unit for an ontology-based annotation. OntologyAnnotation
has restrictions on the following properties:
• hasOntAnnotationId: The ID of the annotation. The property cardinality equals
one (owl:cardinality = 1).
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