core: RDF.Data protocol
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lib/rdf/data.ex
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lib/rdf/data.ex
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defprotocol RDF.Data do
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@moduledoc """
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An abstraction over the different data structures for collections of RDF statements.
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"""
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@doc """
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Add statements to a RDF data structure.
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"""
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def add(data, statements)
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@doc """
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Adds statements to a RDF data structure and overwrites all existing statements with the same subjects and predicates.
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"""
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def put(data, statements)
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@doc """
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Deletes statements from a RDF data structure.
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"""
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def delete(data, statements)
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@doc """
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Deletes one statement from a RDF data structure and returns a tuple with deleted statement and the changed data structure.
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"""
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def pop(data)
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@doc """
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Checks if the given statement exists within a RDF data structure.
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"""
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def include?(data, statements)
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@doc """
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Returns the list of all statements of a RDF data structure.
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"""
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def statements(data)
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@doc """
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Returns the set of all resources which are subject of the statements of a RDF data structure.
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"""
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def subjects(data)
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@doc """
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Returns the set of all properties used within the statements of RDF data structure.
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"""
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def predicates(data)
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@doc """
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Returns the set of all resources used in the objects within the statements of a RDF data structure.
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"""
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def objects(data)
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@doc """
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Returns the set of all resources used within the statements of a RDF data structure
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"""
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def resources(data)
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@doc """
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Returns the count of all resources which are subject of the statements of a RDF data structure.
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"""
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def subject_count(data)
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@doc """
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Returns the count of all statements of a RDF data structure.
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"""
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def statement_count(data)
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end
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