## Legacy tokenizer
+!!! danger
+ The Legacy tokenizer is deprecated and will be removed in Nominatim 5.0.
+ If you still use a database with the legacy tokenizer, you must reimport
+ it using the ICU tokenizer below.
+
The legacy tokenizer implements the analysis algorithms of older Nominatim
versions. It uses a special Postgresql module to normalize names and queries.
This tokenizer is automatically installed and used when upgrading an older