# File lib/rdf/redland/model.rb, line 145
    def delete_statement(statement,context=nil)
      if context
        context = Node.ensure(context)
        RedlandError.new("Cannot make a Node from an object of #{context.class}") if not context
        return Redland.librdf_model_context_remove_statement(self.model,context,statement.statement)
      else
        return Redland.librdf_model_remove_statement(self.model,statement.statement)
      end
    end