The generic structure of SPARQL is as follows:
- PREFIX: Similar to the declaration of namespaces in the context of XML, and package in the context of Java, or any similar programming languages, PREFIX is the SPARQL equivalent, which ensures uniqueness among entity representations and eliminates the need for typing long URI patterns within SPARQL code.
- SELECT / ASK / DESCRIBE / CONSTRUCT:
- SELECT: This is an equivalent of SQL's SELECT clause. It defines the attributes that are required to be fetched from the RDF triples that fulfill the selection criteria.
- ASK: This returns a Boolean value of true or false depending on the availability of the RDF triples, and based on the selection criteria within the ...