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module RDF::NTriples
##
# N-Triples format specification.
#
# Note: Latest standards activities treat N-Triples as a subset
# of Turtle. This includes application/n-triples mime type and a
# new default encoding of utf-8.
#
# @example Obtaining an NTriples format class
# RDF::Format.for(:ntriples) #=> RDF::NTriples::Format
# RDF::Format.for("etc/doap.nt")
# RDF::Format.for(file_name: "etc/doap.nt")
# RDF::Format.for(file_extension: "nt")
# RDF::Format.for(content_type: "application/n-triples")
#
# @see http://www.w3.org/TR/rdf-testcases/#ntriples
# @see http://www.w3.org/TR/n-triples/
class Format < RDF::Format
content_type 'application/n-triples', extension: :nt, alias: ['text/plain']
content_encoding 'utf-8'
reader { RDF::NTriples::Reader }
writer { RDF::NTriples::Writer }
##
# Sample detection to see if it matches N-Triples
#
# Use a text sample to detect the format of an input file. Sub-classes implement
# a matcher sufficient to detect probably format matches, including disambiguating
# between other similar formats.
#
# @param [String] sample Beginning several bytes (about 1K) of input.
# @return [Boolean]
def self.detect(sample)
!!sample.match(%r(
(?:(?:<[^>]*>) | (?:_:\w+)) # Subject
\s*
(?:<[^>]*>) # Predicate
\s*
(?:(?:<[^>]*>) | (?:_:\w+) | (?:"[^"\n]*"(?:^^|@\S+)?)) # Object
\s*\.
)x) && !(
sample.match(%r(@(base|prefix|keywords)|\{)) || # Not Turtle/N3/TriG
sample.match(%r(<(html|rdf))i) # Not HTML or XML
) && !RDF::NQuads::Format.detect(sample)
end
# Human readable name for this format
def self.name; "N-Triples"; end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems