diff -r 706f10bcdc3c -r f5690d918358 common/corpus-common-addon/addon/utils/utils.js
--- a/common/corpus-common-addon/addon/utils/utils.js	Sun Oct 02 19:11:06 2016 +0200
+++ b/common/corpus-common-addon/addon/utils/utils.js	Sun Oct 02 19:14:07 2016 +0200
@@ -1,5 +1,5 @@
 import * as constants from 'corpus-common-addon/utils/constants';
-import _ from "lodash/lodash";
+import _ from 'lodash/lodash';
 
 export function isLexvoLink(s) {
   return s && typeof s === 'string' && s.startsWith(constants.LEXVO_BASE_URL);
@@ -10,16 +10,20 @@
 };
 
 export function isArkBnfLink(s) {
-  return s && typeof s === 'string' && (s.startsWith(constants.BNF_BASE_URL+constants.BNF_ARK_BASE_ID) || s.startsWith(constants.BNF_ARK_BASE_URL+constants.BNF_ARK_BASE_ID));
+  return s && typeof s === 'string' && (s.startsWith(constants.BNF_BASE_URL + constants.BNF_ARK_BASE_ID) || s.startsWith(constants.BNF_ARK_BASE_URL + constants.BNF_ARK_BASE_ID));
 };
 
+export function isGeonamesLink(s) {
+  return (typeof s === 'string') && (s.match(constants.GEONAMES_BASE_URLS) !== null);
+}
+
 export function switchArkBnfLink(s) {
-  if(!s) {
+  if (!s) {
     return s;
   }
-  if(typeof s === 'string' && s.startsWith(constants.BNF_BASE_URL+constants.BNF_ARK_BASE_ID)) {
+  if (typeof s === 'string' && s.startsWith(constants.BNF_BASE_URL + constants.BNF_ARK_BASE_ID)) {
     return constants.BNF_ARK_BASE_URL + s.slice(constants.BNF_BASE_URL.length);
-  } else if (typeof s === 'string' && s.startsWith(constants.BNF_ARK_BASE_URL+constants.BNF_ARK_BASE_ID)) {
+  } else if (typeof s === 'string' && s.startsWith(constants.BNF_ARK_BASE_URL + constants.BNF_ARK_BASE_ID)) {
     return constants.BNF_BASE_URL + s.slice(constants.BNF_ARK_BASE_URL.length);
   } else {
     return s;
@@ -27,11 +31,11 @@
 };
 
 export function calculateBnfArkControlChar(id) {
-  if(!id) {
+  if (!id) {
     return null;
   }
   var sum = _.reduce(id, function(s, c, i) {
-    return s + (i+1) * (c in constants.NOID_CHARS_POS ? constants.NOID_CHARS_POS[c] : 0);
+    return s + (i + 1) * (c in constants.NOID_CHARS_POS ? constants.NOID_CHARS_POS[c] : 0);
   }, 0);
   return constants.NOID_CHARS[sum % constants.NOID_CHARS.length];
 };