class RDF::N3::Algebra::Log::N3String
The subject formula, expressed as N3
, gives this string.
Constants
- NAME
- URI
Public Instance Methods
resolve(resource, position: :subject)
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Serializes the subject formula into an N3
string representation.
@param [RDF::N3::List] resource @return [RDF::Term]
# File lib/rdf/n3/algebra/log/n3_string.rb, line 13 def resolve(resource, position: :subject) case position when :subject return nil unless resource.formula? as_literal(RDF::N3::Writer.buffer {|w| resource.each {|st| w << st}}) when :object return nil unless resource.literal? || resource.variable? resource end end
valid?(subject, object)
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Subject must evaluate to a formula and object to a literal.
@param [RDF::Term] subject @param [RDF::Term] object @return [Boolean]
# File lib/rdf/n3/algebra/log/n3_string.rb, line 30 def valid?(subject, object) subject.formula? && (object.variable? || object.literal?) end