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AquaLog data model is triple-based, which takes the form of . There are two main reasons for adopting a
triple-based data model. First of all, although not all possible queries can be represented in the binary relational model, in practice
these occur very frequently. Secondly, RDF-based knowledge representation (KR) formalisms for the
semantic web , such as
RDF itself or
OWL also subscribe to this binary relational model and express statements as .
Hence, it makes sense for a query system targeted at the semantic web to adopt this data model.
A query can be translated into one or more linguistic-triples. Each linguistic triple then can be translated into one or more
ontology-compliant-triples, and each triple also have features, such as the voice and tense of the relation. However, a key feature
introduced for each triple is its category. These categories tell us how to deal with the elements of that triple, what inference
process is required and what kind or type of answer can be expected.
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