+ // Register node definition by name (allocate an id)
+ // If returns CONTENT_IGNORE, could not allocate id
+ virtual content_t set(const std::string &name,
+ const ContentFeatures &def)=0;
+ // If returns CONTENT_IGNORE, could not allocate id
+ virtual content_t allocateDummy(const std::string &name)=0;
+ // Set an alias so that nodes named <name> will load as <convert_to>.
+ // Alias is not set if <name> has already been defined.
+ // Alias will be removed if <name> is defined at a later point of time.
+ virtual void setAlias(const std::string &name,
+ const std::string &convert_to)=0;