remove typing_extensions requirement

[nominatim.git] / docs / develop / Tokenizers.md

diff --git a/docs/develop/Tokenizers.md b/docs/develop/Tokenizers.md
index 5282db1ae73a1ad375232fedc647df130ad71a9e..5fe4e38d436b2978ce334a258fdaa80c3a9a9e58 100644 (file)
--- a/docs/develop/Tokenizers.md
+++ b/docs/develop/Tokenizers.md
@@ -6,7 +6,7 @@ tokenizers that use different strategies for normalisation. This page describes
 how tokenizers are expected to work and the public API that needs to be
 implemented when creating a new tokenizer. For information on how to configure
 a specific tokenizer for a database see the
-[tokenizer chapter in the administration guide](../admin/Tokenizers.md).
+[tokenizer chapter in the Customization Guide](../customize/Tokenizers.md).
 
 ## Generic Architecture
 
@@ -93,7 +93,7 @@ for a custom tokenizer implementation.
 
 Nominatim expects two files for a tokenizer:
 
-* `nominiatim/tokenizer/<NAME>_tokenizer.py` containing the Python part of the
+* `nominatim/tokenizer/<NAME>_tokenizer.py` containing the Python part of the
   implementation
 * `lib-php/tokenizer/<NAME>_tokenizer.php` with the PHP part of the
   implementation
@@ -245,11 +245,11 @@ Currently, tokenizers are encouraged to make sure that matching works against
 both the search token list and the match token list.
 
 ```sql
-FUNCTION token_normalized_postcode(postcode TEXT) RETURNS TEXT
+FUNCTION token_get_postcode(info JSONB) RETURNS TEXT
 ```
 
-Return the normalized version of the given postcode. This function must return
-the same value as the Python function `AbstractAnalyzer->normalize_postcode()`.
+Return the postcode for the object, if any exists. The postcode must be in
+the form that should also be presented to the end-user.
 
 ```sql
 FUNCTION token_strip_info(info JSONB) RETURNS JSONB