diff --git a/dev/js/src/app/de.js b/dev/js/src/app/de.js
index f5be5ec..6576051 100644
--- a/dev/js/src/app/de.js
+++ b/dev/js/src/app/de.js
@@ -9,6 +9,7 @@
   loc.VC_title = 'Titel';
   loc.VC_pubDate = 'Veröffentlichungsdatum';
   loc.VC_pubPlace = 'Veröffentlichungsort';
+  loc.VC_allCorpora = 'allen Korpora';
 
   // Date picker:
   loc.WDAY = ['Mo', 'Di', 'Mi', 'Do', 'Fr', 'Sa', 'So'];
diff --git a/dev/js/src/init.js b/dev/js/src/init.js
index 7c403aa..09804ca 100644
--- a/dev/js/src/init.js
+++ b/dev/js/src/init.js
@@ -21,6 +21,10 @@
   // Set hint array for hint helper
   KorAP.hintArray = hintArray;
 
+  // Localization values
+  var loc = KorAP.Locale;
+  loc.VC_allCorpora = loc.VC_allCorpora  || 'all Corpora';
+
   // Override KorAP.log
   window.alertify = alertifyClass;
   KorAP.log = function (type, msg) {
@@ -48,7 +52,7 @@
       vcname.setAttribute('id', 'vc-choose');
       vcname.appendChild(
 	document.createTextNode(
-	  document.getElementById('vc-name').value
+	  document.getElementById('vc-name').value || loc.VC_allCorpora
 	)
       );
       input.parentNode.insertBefore(vcname, input);
diff --git a/lib/Kalamar/API.pm b/lib/Kalamar/API.pm
index fc49af8..596b75b 100644
--- a/lib/Kalamar/API.pm
+++ b/lib/Kalamar/API.pm
@@ -25,7 +25,8 @@
 			 _api_cache
 			 api_response
 			 benchmark
-			 query_jsonld/]);
+			 query_jsonld
+			 collection_jsonld/]);
   $index_class->attr(no_cache => 0);
 };
 
@@ -351,6 +352,63 @@
   # Set result values
   $index->items_per_page($json->{itemsPerPage});
   $index->query_jsonld($json->{request}->{query});
+
+  # Temporary
+  # $json->{request}->{collection}
+  $index->collection_jsonld({
+    '@type' => "koral:docGroup",
+    "operation" => "operation:or",
+    "operands" => [
+      {
+	'@type' => "koral:docGroup",
+	"operation" => "operation:and",
+	"operands" => [
+	  {
+	    '@type' => "koral:doc",
+	    "key" => "title",
+	    "match" => "match:eq",
+	    "value" => "Der Birnbaum",
+	    "type" => "type:string"
+	  },
+	  {
+	    '@type' => "koral:doc",
+	    "key" => "pubPlace",
+	    "match" => "match:eq",
+	    "value" => "Mannheim",
+	    "type" => "type:string"
+	  },
+	  {
+	    '@type' => "koral:docGroup",
+	    "operation" => "operation:or",
+	    "operands" => [
+	      {
+		'@type' => "koral:doc",
+		"key" => "subTitle",
+		"match" => "match:eq",
+		"value" => "Aufzucht oder Pflege",
+		"type" => "type:string"
+	      },
+	      {
+		'@type' => "koral:doc",
+		"key" => "subTitle",
+		"match" => "match:eq",
+		"value" => "Gedichte",
+		"type" => "type:string"
+	      }
+	    ]
+	  }
+	]
+      },
+      {
+	'@type' => "koral:doc",
+	"key" => "pubDate",
+	"match" => "match:geq",
+	"value" => "2015-03-05",
+	"type" => "type:date"
+      }
+    ]
+  });
+
   $index->results(_map_matches($json->{matches}));
 
   # Total results not set by stash
diff --git a/templates/partial/header.html.ep b/templates/partial/header.html.ep
index a090b76..f714af8 100644
--- a/templates/partial/header.html.ep
+++ b/templates/partial/header.html.ep
@@ -13,11 +13,10 @@
       <button type="submit" title="<%= loc 'go' %>"><span><%= loc 'go' %></span></button>
     </div>
     <!-- Search in the following virtual collection -->
-    <!--
     <div id="vc-view"></div>
-    <%= loc 'in' %> <input type="hidden" id="vc-name" name="vc-name" value="Wikipedia" />
-    <input type="text" name="vc" id="vc" value="corpusID = Wikipedia" />
-    -->
+    <%= loc 'in' %> <input type="hidden" id="vc-name" name="vc-name" value="<%= stash('vc-name') %>" />
+    <input type="text" name="vc" id="vc" value="<%= stash 'vc-query' %>" />
+
     <%= loc 'with' %>
     <span class="select">
       %= select_field 'ql', [[Poliqarp => 'poliqarp'], ['Cosmas II' => 'cosmas2'], ['Annis' => 'annis'], ['CQL v1.2' => 'cql']], id => 'ql-field'
diff --git a/templates/search.html.ep b/templates/search.html.ep
index a0e26b6..20353d0 100644
--- a/templates/search.html.ep
+++ b/templates/search.html.ep
@@ -1,4 +1,5 @@
 % layout 'main', title => loc('searchtitle', q => search->query, ql => search->query_language);
+% use Mojo::JSON 'encode_json';
 
 <div class="resultinfo">
   <div id="pagination"><%= pagination(search->start_page, search->total_pages, url_with->query(['p' => '{page}'])) =%></div>
@@ -16,6 +17,13 @@
 % };
 </div>
 
+% if (search->collection_jsonld) {
+%=  javascript begin
+KorAP.currentVC = <%== encode_json search->collection_jsonld %>;
+%   end
+% };
+
+
 % if (search->total_results != 0 && search->results->size) {
 <div id="search">
   <ol class="align-left">