Rdf Helpers Laravel Package

rdfHelpers\GenericQuadIterator::current() and rdfHelpers\GenericTermIterator::current() now return null if the iterator is invalid.

rdfHelpers\TermIteratorInterface extended with following methods:

• contains(TermCompareInterface $term): bool allowing to perform in_array()-equivalent check
• getValues(): array<string> fetching string values of all terms in the iterator as array.
  • it allows syntax like $iter->getValues()[0] ?? $default
• intersect(array<TermInterface>|Iterator<TermInterface>|IteratorAggregate<TermInterface>|TermInterface $terms): self and skip(array<TermInterface>|Iterator<TermInterface>|IteratorAggregate<TermInterface>|TermInterface $terms):self allowing to quickly filter the iterator content

• Make compatible with both rdfInterface v1 and v2
• RdfNamespace::add() checks if the $iriPrefix isn't already registered

\rdfHelpers\GenericQuadIterator class implementing rdfInterface\TermIterator added.

• \rdfHelpers\NtriplesUtil::serializeLiteral() now adds quotes around literal's value
• \rdfHelpers\GenericQuadIterator can also handle \IteratorAggregate objects

Relaxed dependency on rdfInterface to make it easier to use the library in dev environments depending on non-released rdfInterface versions.

An embarassing error in n-triples escaping fixed

NtriplesUtil methods serialiseIri(), serialiseLiteral() and serialise() become serializeIri(), serializeLiteral() and serialize().