Gregg Kellogg

The Nokogiri-based reader suite for the RDF.rb environment. This version offers substantial performance gains, due to general improvements in RDF.rb as well as a number of improvements in the readers:

General improvements

• Readers save prefix definitions in :prefixes. Writers use :prefixes, or :standard_prefixes to generate QNames.
• Readers supports :canonicalize and :validate options

RDF::N3

• New parser based on Tim-BL's Predictive Parser supports quoted graphs and variables.
• Stream-based reader can process an indefinite length input file, vs. the older Treetop-based reader that was a two-pass parser.
• Substantial performance improvement over previous version, running at about x statements/second on an iMac.
• From History:
• •  New Predictive-Parser based N3 Reader, substantially faster than previous Treetop-based parser
  • RDF.rb 0.3.0 compatibility updates
    • Remove literal_normalization and qname_hacks, add back uri_hacks (until 0.3.0)
    • Use nil for default namespace
    • In Writer
      • Use only :prefixes for creating QNames.
      • Add :standard_prefixes and :default_namespace options.
      • Use """ for multi-line quotes, or anything including escaped characters
    • In Reader
      • URI canonicalization and validation.
      • Added :canonicalize, and :intern options.
      • Added #prefixes method returning a hash of prefix definitions.
      • Change :strict option to :validate.
      • Add check to ensure that predicates are not literals, it's not legal in any RDF variant.
  • RSpec 2 compatibility

RDF::RDFXML

• • RDF.rb 0.3.0 compa tibility updates
    • Remove literal_normalization and qname_hacks, add back uri_hacks (until 0.3.0)
    • Use nil for default namespace
  • In Writer
    • Use only :prefixes for creating QNames.
    • Add :standard_prefixes and :default_namespace options.
    • Improve Writer#to_qname.
    • Don’t try to translate rdf:_1 to rdf:li due to complex corner cases.
    • Fix problems with XMLLiteral, rdf:type and rdf:nodeID serialization.
  • In Reader
    • URI canonicalization and validation.
    • Added :canonicalize, and :intern options.
    • Change :strict option to :validate.
    • Don’t create unnecessary namespaces.
    • Don’t use regexp to substitute base URI in URI serialization.
    • Collect prefixes when extracting mappings.
  • Literal::XML
    • Add all in-scope namespaces, not just those that seem to be used.
  • RSpec 2 compatibility

RDF::RDFa

• • RDF.rb 0.3.0 compat ibility updates
    • Remove literal_normalization and qname_hacks, add back uri_hacks (until 0.3.0)
    • Use nil for default namespace
  • In Writer
    • Use only :prefixes for creating QNames.
    • Add :standard_prefixes and :default_namespace options.
    • Improve Writer#to_qname.
    • Don’t try to translate rdf:_1 to rdf:li due to complex corner cases.
    • Fix problems with XMLLiteral, rdf:type and rdf:nodeID serialization.
  • In Reader
    • URI canonicalization and validation.
    • Added :canonicalize, and :intern options.
    • Change :strict option to :validate.
    • Don’t create unnecessary namespaces.
    • Don’t use regexp to substitute base URI in URI serialization.
    • Collect prefixes when extracting mappings.
  • Literal::XML
    • Add all in-scope namespaces, not just those that seem to be used.
  • RSpec 2 compatibility