diff -r 5b6aa12feaed -r a8b07497ae4b README.md
--- a/README.md	Sun Jun 24 02:25:12 2018 +0200
+++ b/README.md	Sun Jun 24 03:39:26 2018 +0200
@@ -114,9 +114,9 @@
 
 ### Elasticsearch
 
-Some objects in Iconolab are indexed and searched using ElasticSearch. You need to configure Haystack (see dev.py.tmpl, HAYSTACK_CONNECTIONS) and run:
+Some objects in Iconolab are indexed and searched using ElasticSearch. You need to configure the elasticsearch parameters (see dev.py.tmpl, ELASTICSEARCH_DSL) and run:
 
-    python manage.py rebuild_index
+    python manage.py search_index --rebuild
 
 
 ### 2. Python server
@@ -178,4 +178,15 @@
 - ```--collection-id```: the id of the collection to import into, it must already exist
 
 
- * document the test import command  : `python manage.py importimages --collection-json dossierImportMontauban/montauban_collection.json --metacategories-json dossierImportMontauban/montauban_metacategories_import.json --encoding "UTF-8" --delimiter "," dossierImportMontauban/ExportMontauban.csv`
\ No newline at end of file
+ * document the test import command  : `python manage.py importimages --collection-json dossierImportMontauban/montauban_collection.json --metacategories-json dossierImportMontauban/montauban_metacategories_import.json --encoding "UTF-8" --delimiter "," dossierImportMontauban/ExportMontauban.csv`
+
+
+### defining a new version
+
+To define a new version, the following steps must be taken.
+* if needed, refresh the `iconolab` version number in `src/setup.py`, in the key `install_requires`.
+* check that the matching tag has been published in the `iconolab` mercurial repository.
+* Update the version number in `src/iconolab_mcc/__init__.py`
+* Create a mercurial tag that matches the new version number
+* push the new commits and tag
+