#define Z_External_summary 13
#define Z_External_OPAC 14
#define Z_External_searchResult1 15
+#define Z_External_update 16
union
{
/* Generic types */
Z_Espec1 *espec1;
Z_BriefBib *summary;
Z_SearchInfoReport *searchResult1;
+ Z_IUUpdate *update;
} u;
};