diff -r 5fed7e1716c2 -r 1baa7c6bd370 common/corpus-common-addon/addon/utils/constants.js
--- a/common/corpus-common-addon/addon/utils/constants.js	Wed Mar 02 13:47:07 2016 +0100
+++ b/common/corpus-common-addon/addon/utils/constants.js	Thu Mar 03 17:34:12 2016 +0100
@@ -6,3 +6,13 @@
 export const BNF_ARK_BASE_URL = "http://ark.bnf.fr/";
 export const BNF_ARK_BASE_ID = "ark:/12148/";
 export const DEFAULT_STORE_EXP = 3600000;
+export const NOID_CHARS = [
+  '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+	'b', 'c', 'd', 'f', 'g', 'h', 'j', 'k', 'm', 'n',
+	'p', 'q', 'r', 's', 't', 'v', 'w', 'x', 'z'
+];
+export const NOID_CHARS_POS = {
+  '0': 0, '1': 1, '2': 2, '3': 3, '4': 4, '5': 5, '6': 6, '7': 7, '8': 8, '9': 9,
+	'b': 10, 'c': 11, 'd': 12, 'f': 13, 'g': 14, 'h': 15, 'j': 16, 'k': 17, 'm': 18, 'n': 19,
+	'p': 20, 'q': 21, 'r': 22, 's': 23, 't': 24, 'v': 25, 'w': 26, 'x': 27, 'z': 28
+};