+/*
+ * Locate a specific triple within a variant.
+ * set is the set to look for, universal set is the set that applies to a
+ * triple with an unknown set.
+ */
+static Z_Triple *find_triple(Z_Variant *var, oid_value universalset,
+ oid_value set, int zclass, int type)
+{
+ int i;
+ oident *defaultsetent = oid_getentbyoid(var->globalVariantSetId);
+ oid_value defaultset = defaultsetent ? defaultsetent->value :
+ universalset;
+
+ for (i = 0; i < var->num_triples; i++)
+ {
+ oident *cursetent =
+ oid_getentbyoid(var->triples[i]->variantSetId);
+ oid_value curset = cursetent ? cursetent->value : defaultset;
+
+ if (set == curset &&
+ *var->triples[i]->zclass == zclass &&
+ *var->triples[i]->type == type)
+ return var->triples[i];
+ }
+ return 0;
+}
+
+static void mark_subtree(data1_node *n, int make_variantlist, int no_data,
+ int get_bytes, Z_Variant *vreq)
+{
+ data1_node *c;
+
+ if (n->which == DATA1N_tag && (!n->child || n->child->which != DATA1N_tag))
+ {
+ n->u.tag.node_selected = 1;
+ n->u.tag.make_variantlist = make_variantlist;
+ n->u.tag.no_data_requested = no_data;
+ n->u.tag.get_bytes = get_bytes;
+ }
+
+ for (c = n->child; c; c = c->next)
+ {
+ if (c->which == DATA1N_tag && (!n->child ||
+ n->child->which != DATA1N_tag))
+ {
+ c->u.tag.node_selected = 1;
+ c->u.tag.make_variantlist = make_variantlist;
+ c->u.tag.no_data_requested = no_data;
+ c->u.tag.get_bytes = get_bytes;
+ }
+ mark_subtree(c, make_variantlist, no_data, get_bytes, vreq);
+ }
+}
+
+static int match_children_here(data1_node *n, Z_Espec1 *e, int i,
+ Z_ETagUnit **t, int num)