- std::string key_type () const;
- std::string cpl_node_name (Standard standard) const;
- std::pair<std::string, std::string> cpl_node_namespace (Standard) const;
+ boost::optional<std::string> key_type () const override {
+ return std::string("MDEK");
+ }
+ std::string cpl_node_name (Standard standard) const override;
+ std::pair<std::string, std::string> cpl_node_namespace () const override;