-/* Compares the given string with the appropriate field of the selector. If the
- * selector field is "/all/" or "/any/", returns true without checking the
- * instances. See "graph_inst_search_field" for finding all matching instances.
- * */
+/* Returns true if a file may apply to both, the graphs selector and the
+ * selector given as argument. If the selectors contradict one another,
+ * returns false. */
+_Bool graph_ident_intersect (graph_config_t *cfg,
+ const graph_ident_t *selector);
+
+/* Compares the given string with the appropriate field of the selector. If
+ * the selector field is "/all/" or "/any/", returns true without checking the
+ * instances. See "graph_inst_search_field" for finding all matching
+ * instances. */