Index: trunk/src/libcschem/abstract.c
===================================================================
--- trunk/src/libcschem/abstract.c	(revision 782)
+++ trunk/src/libcschem/abstract.c	(revision 783)
@@ -112,7 +112,15 @@
 	for(e = htsp_first(attr); e != NULL; e = htsp_next(attr, e)) {
 		const csch_attrib_t *a = e->value;
 		if (a->deleted) continue;
-		fprintf(f, "%s%s %s=%s\n", prefix1, prefix2, a->key, a->val);
+		if (a->val == NULL) {
+			long n;
+			fprintf(f, "%s%s %s={\n", prefix1, prefix2, a->key);
+			for(n = 0; n < a->arr.used; n++)
+				fprintf(f, "%s%s  %s\n", prefix1, prefix2, a->arr.array[n]);
+			fprintf(f, "%s%s }\n", prefix1, prefix2);
+		}
+		else
+			fprintf(f, "%s%s %s=%s\n", prefix1, prefix2, a->key, a->val);
 	}
 }