while (tokenizer.hasMoreTokens()) {
String tok = tokenizer.nextToken();
try {
ConfigOpacCatalogue coc = new ConfigOpac().getCatalogueByName(opacKatalog);
IOpacPlugin iopac = (IOpacPlugin) PluginLoader.getPluginByTitle(PluginType.Opac, coc.getOpacType());
Fileformat addrdf = iopac.search(this.opacSuchfeld, tok, coc, this.myPrefs);
if (addrdf != null) {
/* die Liste aller erlaubten Metadatenelemente erstellen */
List<String> erlaubte = new ArrayList<String>();
for (Iterator<MetadataType> it = this.myDocStruct.getAddableMetadataTypes().iterator(); it.hasNext();) {