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Class Redland::Literal
In: rdf/redland/node.rb
Parent: Node

A literal node

Methods

from_node   from_xml   new  

Included Modules

Attributes

language  [R]  the language of the literal
value  [R]  the string value of the literal

Public Class methods

create a literal from another Node

[Source]

# File rdf/redland/node.rb, line 246
    def Literal.from_node(node)
      lang = Redland.librdf_node_get_literal_value_language(node) if Redland.librdf_node_get_literal_value_language(node)
      str = Redland.librdf_node_get_literal_value(node)
      hash_uri = Redland.librdf_node_get_literal_value_datatype_uri(node)
      hash_uri = Uri.new(Redland.librdf_uri_to_string(hash_uri)) if hash_uri
      return Literal.new(str,lang,hash_uri)
    end

create a literal from and xml string

 literal = Literal.from_xml('<em>This is emphasized</em>')

[Source]

# File rdf/redland/node.rb, line 256
    def Literal.from_xml(str,lang=nil)
      return Literal.new(str,lang,nil,true)
    end

create a new Literal node

 literal = Literal.new('Dominic')
 label = Literal.new('Name','en')

[Source]

# File rdf/redland/node.rb, line 231
    def initialize(str,lang=nil,uri=nil,is_xml=false)
      @value = str
      @language = lang
      is_xml = is_xml==true ? 1 : 0
      if uri
        @node = Redland.librdf_new_node_from_typed_literal($world.world,value,lang,uri.uri)
      else
        @node = Redland.librdf_new_node_from_literal($world.world,value,lang,is_xml)
      end

      raise RedlandError.new("Node construction failed") if not @node
      ObjectSpace.define_finalizer(self,Node.create_finalizer(@node))
    end

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(C) Copyright 2004-2011 Dave Beckett, (C) Copyright 2004-2005 University of Bristol