postcodes: introduce a default pattern for countries without postcodes

[nominatim.git] / docs / admin / Migration.md

diff --git a/docs/admin/Migration.md b/docs/admin/Migration.md
index 8458e3d921409fdd1d8a8adbb68c1d120370348c..950f7e193beee883a5fd4d06c2ea65bcd1e500a3 100644 (file)
--- a/docs/admin/Migration.md
+++ b/docs/admin/Migration.md
@@ -15,7 +15,24 @@ breaking changes. **Please read them before running the migration.**
     If you are migrating from a version <3.6, then you still have to follow
     the manual migration steps up to 3.6.
 
-## 3.7.0 -> master
+## 4.0.0 -> master
+
+### ICU tokenizer is the new default
+
+Nominatim now installs the [ICU tokenizer](../customize/Tokenizers.md#icu-tokenizer)
+by default. This only has an effect on newly installed databases. When
+updating older databases, it keeps its installed tokenizer. If you still
+run with the legacy tokenizer, make sure to compile Nominatim with the
+PostgreSQL module, see [Installation](Installation.md#building-nominatim).
+
+### geocodejson output changed
+
+The `type` field of the geocodejson output has changed. It now contains
+the address class of the object instead of the value of the OSM tag. If
+your client has used the `type` field, switch them to read `osm_value`
+instead.
+
+## 3.7.0 -> 4.0.0
 
 ### NOMINATIM_PHRASE_CONFIG removed
 
@@ -29,6 +46,13 @@ the configuration in older versions. If you are updating from Nominatim < 3.7
 and still work with a custom `phrase-settings.php`, you need to manually
 convert it into a json format.
 
+### PHP utils removed
+
+The old PHP utils have now been removed completely. You need to switch to
+the appropriate functions of the nominatim  command line tool. See
+[Introducing `nominatim` command line tool](#introducing-nominatim-command-line-tool)
+below.
+
 ## 3.6.0 -> 3.7.0
 
 ### New format and name of configuration file