const char *render = ZOOM_record_get(rec, "render", &len);
const char *opac_render = ZOOM_record_get(rec, "opac", &opac_len);
const char *syntax = ZOOM_record_get(rec, "syntax", 0);
const char *render = ZOOM_record_get(rec, "render", &len);
const char *opac_render = ZOOM_record_get(rec, "opac", &opac_len);
const char *syntax = ZOOM_record_get(rec, "syntax", 0);