diff -r d37d57c99cac -r 6b5f03f1c084 razor.h
--- a/razor.h	Sun Sep 30 00:18:20 2007 -0400
+++ b/razor.h	Fri Oct 05 16:38:59 2007 -0400
@@ -24,6 +24,18 @@
 				   struct razor_set *upstream,
 				   int count, const char **packages);
 
+typedef void (*razor_package_callback_t)(const char *name,
+					 const char *old_version,
+					 const char *new_version,
+					 void *data);
+void
+razor_set_diff(struct razor_set *set, struct razor_set *upstream,
+	       razor_package_callback_t callback, void *data);
+
+
+/* Importer interface; for building a razor set from external sources,
+ * like yum, rpmdb or razor package files. */
+
 struct razor_importer;
 
 struct razor_importer *razor_importer_new(void);