release 4.5.0.post1

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

diff --git a/docs/customize/Tokenizers.md b/docs/customize/Tokenizers.md
index 19d867ddd800063494d72ad6ac078025d7ce2347..30be170edea91babfa271d47364d123d84f9fdf0 100644 (file)
--- a/docs/customize/Tokenizers.md
+++ b/docs/customize/Tokenizers.md
@@ -15,48 +15,6 @@ they can be configured.
     chosen tokenizer is very limited as well. See the comments in each tokenizer
     section.
 
     chosen tokenizer is very limited as well. See the comments in each tokenizer
     section.
 

-## Legacy tokenizer
-
-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
-database. It should not be used for new installations anymore.
-
-### Compiling the PostgreSQL module
-
-The tokeinzer needs a special C module for PostgreSQL which is not compiled
-by default. If you need the legacy tokenizer, compile Nominatim as follows:
-
-```
-mkdir build
-cd build
-cmake -DBUILD_MODULE=on
-make
-```
-
-### Enabling the tokenizer
-
-To enable the tokenizer add the following line to your project configuration:
-
-```
-NOMINATIM_TOKENIZER=legacy
-```
-
-The Postgresql module for the tokenizer is available in the `module` directory
-and also installed with the remainder of the software under
-`lib/nominatim/module/nominatim.so`. You can specify a custom location for
-the module with
-
-```
-NOMINATIM_DATABASE_MODULE_PATH=<path to directory where nominatim.so resides>
-```
-
-This is in particular useful when the database runs on a different server.
-See [Advanced installations](../admin/Advanced-Installations.md#importing-nominatim-to-an-external-postgresql-database) for details.
-
-There are no other configuration options for the legacy tokenizer. All
-normalization functions are hard-coded.
-

 ## ICU tokenizer
 
 The ICU tokenizer uses the [ICU library](http://site.icu-project.org/) to
 ## ICU tokenizer
 
 The ICU tokenizer uses the [ICU library](http://site.icu-project.org/) to


@@ -102,7 +60,7 @@ Here is an example configuration file:
 ``` yaml
 normalization:
     - ":: lower ()"
 ``` yaml
 normalization:
     - ":: lower ()"

-    - "ß > 'ss'" # German szet is unimbigiously equal to double ss
+    - "ß > 'ss'" # German szet is unambiguously equal to double ss

 transliteration:
     - !include /etc/nominatim/icu-rules/extended-unicode-to-asccii.yaml
     - ":: Ascii ()"
 transliteration:
     - !include /etc/nominatim/icu-rules/extended-unicode-to-asccii.yaml
     - ":: Ascii ()"


@@ -128,7 +86,7 @@ The configuration file contains four sections:
 The normalization and transliteration sections each define a set of
 ICU rules that are applied to the names.
 
 The normalization and transliteration sections each define a set of
 ICU rules that are applied to the names.
 

-The **normalisation** rules are applied after sanitation. They should remove
+The **normalization** rules are applied after sanitation. They should remove

 any information that is not relevant for search at all. Usual rules to be
 applied here are: lower-casing, removing of special characters, cleanup of
 spaces.
 any information that is not relevant for search at all. Usual rules to be
 applied here are: lower-casing, removing of special characters, cleanup of
 spaces.


@@ -175,36 +133,67 @@ The following is a list of sanitizers that are shipped with Nominatim.
 
 ##### split-name-list
 
 
 ##### split-name-list
 

-::: nominatim.tokenizer.sanitizers.split_name_list
-    selection:
+::: nominatim_db.tokenizer.sanitizers.split_name_list
+    options:

         members: False
         members: False

-    rendering:

         heading_level: 6
         heading_level: 6

+        docstring_section_style: spacy

 
 ##### strip-brace-terms
 
 
 ##### strip-brace-terms
 

-::: nominatim.tokenizer.sanitizers.strip_brace_terms
-    selection:
+::: nominatim_db.tokenizer.sanitizers.strip_brace_terms
+    options:

         members: False
         members: False

-    rendering:

         heading_level: 6
         heading_level: 6

+        docstring_section_style: spacy

 
 ##### tag-analyzer-by-language
 
 
 ##### tag-analyzer-by-language
 

-::: nominatim.tokenizer.sanitizers.tag_analyzer_by_language
-    selection:
+::: nominatim_db.tokenizer.sanitizers.tag_analyzer_by_language
+    options:

         members: False
         members: False

-    rendering:

         heading_level: 6
         heading_level: 6

+        docstring_section_style: spacy

 
 ##### clean-housenumbers
 
 
 ##### clean-housenumbers
 

-::: nominatim.tokenizer.sanitizers.clean_housenumbers
-    selection:
+::: nominatim_db.tokenizer.sanitizers.clean_housenumbers
+    options:

         members: False
         members: False

-    rendering:

         heading_level: 6
         heading_level: 6

+        docstring_section_style: spacy

 
 

+##### clean-postcodes
+
+::: nominatim_db.tokenizer.sanitizers.clean_postcodes
+    options:
+        members: False
+        heading_level: 6
+        docstring_section_style: spacy
+
+##### clean-tiger-tags
+
+::: nominatim_db.tokenizer.sanitizers.clean_tiger_tags
+    options:
+        members: False
+        heading_level: 6
+        docstring_section_style: spacy
+
+#### delete-tags
+
+::: nominatim_db.tokenizer.sanitizers.delete_tags
+    options:
+        members: False
+        heading_level: 6
+        docstring_section_style: spacy
+
+#### tag-japanese
+
+::: nominatim_db.tokenizer.sanitizers.tag_japanese
+    options:
+        members: False
+        heading_level: 6
+        docstring_section_style: spacy

 
 #### Token Analysis
 
 
 #### Token Analysis
 


@@ -222,8 +211,12 @@ 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
 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. There is one special id '@housenumber'. If an analyzer
-with that name is present, it is used for normalization of house numbers.
+analyzer was selected. There are analysers with special ids:
+
+ * '@housenumber'. If an analyzer with that name is present, it is used
+   for normalization of house numbers.
+ * '@potcode'. If an analyzer with that name is present, it is used
+   for normalization of postcodes.

 
 Different analyzer implementations may exist. To select the implementation,
 the `analyzer` parameter must be set. The different implementations are
 
 Different analyzer implementations may exist. To select the implementation,
 the `analyzer` parameter must be set. The different implementations are


@@ -356,6 +349,14 @@ house numbers of the form '3 a', '3A', '3-A' etc. are all considered equivalent.
 
 The analyzer cannot be customized.
 
 
 The analyzer cannot be customized.
 

+##### Postcode token analyzer
+
+The analyzer `postcodes` is pupose-made to analyze postcodes. It supports
+a 'lookup' variant of the token, which produces variants with optional
+spaces. Use together with the clean-postcodes sanitizer.
+
+The analyzer cannot be customized.
+

 ### Reconfiguration
 
 Changing the configuration after the import is currently not possible, although
 ### Reconfiguration
 
 Changing the configuration after the import is currently not possible, although