--- a/admin/refreshDesignDoc.php
+++ b/admin/refreshDesignDoc.php
@@ -42,6 +42,7 @@
 $obj->views->byWebServer->map = "function(doc) {\n  emit(doc.web_server, doc);\n}";
 
 $obj->views->datasets->map = "function(doc) {\nif (doc.fieldName == \"data\") {\n  emit(doc._id, doc);\n}\n}";
+$obj->views->datasetGroups->map = "function(doc) {\nif (doc.fieldName == \"data\") {\n  doc.metadata[\"data.gov.au Category\"] && doc.metadata[\"data.gov.au Category\"].forEach(function(tag) {\n emit(tag, doc.url); \n  });\n}\n}";
 $obj->views->getValidationRequired->map = "function(doc) {\nif (doc.mime_type == \"text/html\" \n&& typeof(doc.validation) == \"undefined\") {\n  emit(doc._id, doc._attachments);\n}\n}";
 $docdb->save($obj, true);