ruby-rdf / rdf / 1019

92%

Pull #329

travis-ci

Make Dataset concrete

RDF::Dataset previously served as little more than an abstract
class. Instantiating one was possible, but didn't provide any useful
functionality. This implements a basic `RDF::Dataset` as an
`Enumerable`/`Queryable` over a static dataset specified at
initialization.

Clarifies handling of the default graph, adopting the ususal definition
of an RDF/SPARQL dataset for `RDF::Dataset` and its
subclasses (e.g. `RDF::Repository`). Normal `Enumerable`/`Queryable`
objects continue to *not* behave like RDF datasets. The accompanying
changes to `rdf-spec` reflect this while running the shared examples
over such a generic `Queryable`.

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