Class: RDF::NQuads::Format

Inherits:
Format
  • Object
show all
Defined in:
lib/rdf/nquads.rb

Overview

N-Quads format specification.

Examples:

Obtaining an NQuads format class

RDF::Format.for(:nquads)     #=> RDF::NQuads::Format
RDF::Format.for("etc/doap.nq")
RDF::Format.for(:file_name      => "etc/doap.nq")
RDF::Format.for(:file_extension => "nq")
RDF::Format.for(:content_type   => "text/x-nquads")

See Also:

Since:

  • 0.4.0

Class Method Summary collapse

Methods inherited from Format

content_type, content_types, each, file_extensions, for, reader, to_sym, writer

Class Method Details

.detect(sample) ⇒ Boolean

Sample detection to see if it matches N-Quads (or 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.

Parameters:

  • sample (String) —

    Beginning several bytes (about 1K) of input.

Returns:

  • (Boolean)

Since:

  • 0.4.0



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# File 'lib/rdf/nquads.rb', line 37

def self.detect(sample)
  !!sample.match(%r(
    (?:\s*(?:<[^>]*>) | (?:_:\w+))                          # Subject
    (?:\s*<[^>]*>)                                          # Predicate
    \s*
    (?:(?:<[^>]*>) | (?:_:\w+) | (?:"[^"\n]*"(?:^^|@\S+)?)) # Object
    (?:\s*<[^>]*>)                                          # Context
    \s*\.
  )mx) && !(
    sample.match(%r(@(base|prefix|keywords)|\{)) ||         # Not Turtle/N3/TriG
    sample.match(%r(<(html|rdf))i)                          # Not HTML or XML
  )
end