Extended XSD Datatypes and XQuery functions for RDF.rb

This gem adds additional RDF::Literal subclasses for extended XSD datatypes along with methods implementing many XPath and XQuery Functions

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  • Additional xsd:integer subtypes
  • xsd:float based on xsd:double
  • xsd:duration, xsd:yearMonthDuration, and xsd:dayTimeDuration.
  • rdf:XMLLiteral
  • XML Exclusive Canonicalization (Nokogiri & REXML)
  • XML Literal comparisons (EquivalentXml, ActiveSupport or String)


require 'rdf'
require 'rdf/xsd'



Full documentation available on GitHub

Principle Classes

Change Log

See Release Notes on GitHub


The recommended installation method is via RubyGems. To install the latest official release of the RDF::XSD gem, do:

% [sudo] gem install rdf-xsd

Mailing List



This repository uses Git Flow to mange development and release activity. All submissions must be on a feature branch based on the develop branch to ease staging and integration.

  • Do your best to adhere to the existing coding conventions and idioms.
  • Don't use hard tabs, and don't leave trailing whitespace on any line.
  • Do document every method you add using YARD annotations. Read the tutorial or just look at the existing code for examples.
  • Don't touch the .gemspec, VERSION or AUTHORS files. If you need to change them, do so on your private branch only.
  • Do feel free to add yourself to the CREDITS file and the corresponding list in the the README. Alphabetical order applies.
  • Do note that in order for us to merge any non-trivial changes (as a rule of thumb, additions larger than about 15 lines of code), we need an explicit public domain dedication on record from you, which you will be asked to agree to on the first commit to a repo within the organization. Note that the agreement applies to all repos in the Ruby RDF organization.


This is free and unencumbered public domain software. For more information, see https://unlicense.org/ or the accompanying UNLICENSE file.

Portions of tests are derived from W3C DAWG tests and have other licensing terms.