X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/4a41bff3ab52d64bd76275e6a337a3fab3922065..9a1f891998d9b56481b96b5201317494987302e1:/docs/customize/Tokenizers.md

diff --git a/docs/customize/Tokenizers.md b/docs/customize/Tokenizers.md
index 5c766f50..d849eb48 100644
--- a/docs/customize/Tokenizers.md
+++ b/docs/customize/Tokenizers.md
@@ -181,6 +181,13 @@ The following is a list of sanitizers that are shipped with Nominatim.
     rendering:
         heading_level: 6
 
+##### clean-housenumbers
+
+::: nominatim.tokenizer.sanitizers.clean_housenumbers
+    selection:
+        members: False
+    rendering:
+        heading_level: 6
 
 
 #### Token Analysis
@@ -199,15 +206,16 @@ by a sanitizer (see for example the
 The token-analysis section contains the list of configured analyzers. Each
 analyzer must have an `id` parameter that uniquely identifies the analyzer.
 The only exception is the default analyzer that is used when no special
-analyzer was selected.
+analyzer was selected. There is one special id '@housenumber'. If an analyzer
+with that name is present, it is used for normalization of house numbers.
 
 Different analyzer implementations may exist. To select the implementation,
-the `analyzer` parameter must be set. Currently there is only one implementation
-`generic` which is described in the following.
+the `analyzer` parameter must be set. The different implementations are
+described in the following.
 
 ##### Generic token analyzer
 
-The generic analyzer is able to create variants from a list of given
+The generic analyzer `generic` is able to create variants from a list of given
 abbreviation and decomposition replacements and introduce spelling variations.
 
 ###### Variants
@@ -324,6 +332,14 @@ the mode by adding:
 
 to the analyser configuration.
 
+##### Housenumber token analyzer
+
+The analyzer `housenumbers` is purpose-made to analyze house numbers. It
+creates variants with optional spaces between numbers and letters. Thus,
+house numbers of the form '3 a', '3A', '3-A' etc. are all considered equivalent.
+
+The analyzer cannot be customized.
+
 ### Reconfiguration
 
 Changing the configuration after the import is currently not possible, although