Index: trunk/src/drc.h
===================================================================
--- trunk/src/drc.h	(revision 21158)
+++ trunk/src/drc.h	(revision 21159)
@@ -36,6 +36,8 @@
 
 typedef struct drc_violation_s pcb_drc_violation_t;
 struct drc_violation_s {
+	unsigned long int uid;        /* ID unique for each violation within the drc subsystem (for GUI identification of violations) */
+
 	char *title;
 	char *explanation;
 
Index: trunk/src/find_drc.c
===================================================================
--- trunk/src/find_drc.c	(revision 21158)
+++ trunk/src/find_drc.c	(revision 21159)
@@ -40,6 +40,8 @@
 static void GotoError(void);
 static pcb_bool DRCFind(pcb_drc_list_t *lst, int What, void *ptr1, void *ptr2, void *ptr3);
 
+static unsigned long int pcb_drc_next_uid = 0;
+
 static pcb_drc_violation_t *pcb_drc_violation_new(
 	const char *title, const char *explanation,
 	pcb_bool have_measured, pcb_coord_t measured_value,
@@ -47,6 +49,9 @@
 {
 	pcb_drc_violation_t *violation = calloc(sizeof(pcb_drc_violation_t), 1);
 
+	pcb_drc_next_uid++;
+	violation->uid = pcb_drc_next_uid;
+
 	violation->title = pcb_strdup(title);
 	violation->explanation = pcb_strdup(explanation);
 	violation->have_measured = have_measured;