class RDF::Turtle::Format
Turtle
format specification.
@example Obtaining an Turtle
format class
RDF::Format.for("etc/foaf.ttl") RDF::Format.for(file_name: "etc/foaf.ttl") RDF::Format.for(file_extension: "ttl") RDF::Format.for(content_type: "text/turtle")
@example Obtaining serialization format MIME types
RDF::Format.content_types #=> {"text/turtle" => [RDF::Turtle::Format]}
@example Obtaining serialization format file extension mappings
RDF::Format.file_extensions #=> {ttl: "text/turtle"}
Public Class Methods
detect(sample)
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Sample detection to see if it matches Turtle
(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.
@param [String] sample Beginning several bytes (~ 1K) of input. @return [Boolean]
# File lib/rdf/turtle/format.rb, line 41 def self.detect(sample) !!sample.match(%r( (?:@(base|prefix)) | # Turtle keywords ["']{3} | # STRING_LITERAL_LONG_SINGLE_QUOTE/2 "[^"]*"^^ | "[^"]*"@ | # Typed/Language literals (?: (?:\s*(?:(?:<[^>]*>) | (?:\w*:\w+) | (?:"[^"]*"))\s*[,;]) || (?:\s*(?:(?:<[^>]*>) | (?:\w*:\w+) | (?:"[^"]*"))){3} ) )mx) && !( sample.match(%r([{}])) || # TriG sample.match(%r(@keywords|=>|\{)) || # N3 sample.match(%r(<(?:\/|html|rdf))i) || # HTML, RDF/XML sample.match(%r(^(?:\s*<[^>]*>){4}.*\.\s*$)) || # N-Quads sample.match(%r("@(context|subject|iri)")) # JSON-LD ) end
symbols()
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List of symbols used to lookup this format
# File lib/rdf/turtle/format.rb, line 60 def self.symbols [:turtle, :ttl] end