/** Public functions.
*/
-extern mlt_repository mlt_repository_init( mlt_properties object_list, char *prefix, char *file, char *symbol );
-extern void *mlt_repository_fetch( mlt_repository this, char *service, void *input );
-extern void mlt_repository_close( mlt_repository this );
+extern mlt_repository mlt_repository_init( mlt_properties object_list, const char *prefix, const char *file, const char *symbol );
+extern void *mlt_repository_fetch( mlt_repository self, const char *service, void *input );
+extern void mlt_repository_close( mlt_repository self );
#endif