Index: trunk/src/libcschem/abstract.c
===================================================================
--- trunk/src/libcschem/abstract.c	(revision 3179)
+++ trunk/src/libcschem/abstract.c	(revision 3180)
@@ -108,6 +108,7 @@
 {
 	dst->type = type;
 	csch_attrib_init(&dst->attr);
+	dst->abst = abs;
 
 	/* assign unique aid */
 	dst->aid = abs->next_aid;
Index: trunk/src/libcschem/abstract.h
===================================================================
--- trunk/src/libcschem/abstract.h	(revision 3179)
+++ trunk/src/libcschem/abstract.h	(revision 3180)
@@ -65,6 +65,7 @@
 	csch_atype_t type;
 	csch_attribs_t attr;
 	long aid;
+	csch_abstract_t *abst;
 } csch_ahdr_t;
 
 typedef struct csch_acomp_s csch_acomp_t;