# File lib/json-schema/validator.rb, line 80
      def extend_schema_definition(schema_uri)
        u = URI.parse(schema_uri)
        validator = JSON::Validator.validators["#{u.scheme}://#{u.host}#{u.path}"]
        if validator.nil?
          raise SchemaError.new("Schema not found: #{u.scheme}://#{u.host}#{u.path}")
        end
        @attributes.merge!(validator.attributes)
      end