list_uri_prefixes: Bugfix

internal/component/instances/php/list_uri_prefixes.php

@@ -23,6 +23,9 @@ function list_prefixes() {
 }
 
 function getTriplestorePrefixes($engine, &$prefixes) {
+    // some adapters don't support a query method!
+    if (!method_exists($engine, 'directQuery')) return NULL;
+
     $results = $engine->directQuery('
     select distinct ?base where {
         {

internal/core/bootstrap/resolver-blocked.txt

@@ -12,5 +12,5 @@ urn:
 http://d-nb.info/gnd/
 http://erlangen-crm.org/
 http://id.gnm.de/ont/
-http://zotero.org/
+http://www.zotero.org/
 https://api.zotero.org/