Method: OpenTox::Owl#set

Defined in:

lib/owl.rb

#set(predicate, object, current_node = @root_node) ⇒ Object

sets values of current_node (by default root_node)

note: this does not delete existing triples

• there can be several triples for the same subject and predicate ( e.g. after set(“description”,“bla1”) and set(“description”,“bla2”)

  both descriptions are in the model, 
  but the get("description") will give you only one object (by chance)
  

• this does not matter in pratice (only dataset uses this -> load_dataset-methods)

• identical values appear only once in rdf

# File 'lib/owl.rb', line 309

def set(predicate, object, current_node=@root_node )
  
  pred = predicate.to_s
  raise "uri is no prop, cannot set uri" if pred=="uri"
  raise "dc[identifier] deprecated, use owl.uri" if pred=="identifier"
  if (object.is_a?(Redland::Node) and object.blank?) or nil==object or object.to_s.size==0
    # set only not-nil values
    LOGGER.warn "skipping (not setting) empty value in rdf for property: '"+pred+"'"
    return 
  end
  
  if pred=="type"
    # predicate is type, set class of current node
    set_type(object, current_node)
  elsif LITERAL_TYPES.has_key?(pred)
    # predicate is literal
    set_literal(pred,object,LITERAL_TYPES[pred],current_node)
  elsif OBJECT_PROPERTY_CLASS.has_key?(pred)
    # predicte is objectProperty, object is another resource
    set_object_property(pred,object,OBJECT_PROPERTY_CLASS[pred],current_node)
  else
    raise "unkonwn rdf-property, please add: '"+pred+"' to OpenTox::OWL.OBJECT_PROPERTY_CLASS or OpenTox::OWL.LITERAL_TYPES"
  end
end