X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/5ff35d998459260e60bcb01aa7302f4706d043b1..0278ab7f41bf9bc96a87084c04bfec263c6acc40:/docs/customize/Tokenizers.md diff --git a/docs/customize/Tokenizers.md b/docs/customize/Tokenizers.md index 19d867dd..df336a71 100644 --- a/docs/customize/Tokenizers.md +++ b/docs/customize/Tokenizers.md @@ -102,7 +102,7 @@ Here is an example configuration file: ``` 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 ()" @@ -128,7 +128,7 @@ 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 **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. @@ -176,35 +176,66 @@ The following is a list of sanitizers that are shipped with Nominatim. ##### split-name-list ::: nominatim.tokenizer.sanitizers.split_name_list - selection: + options: members: False - rendering: heading_level: 6 + docstring_section_style: spacy ##### strip-brace-terms ::: nominatim.tokenizer.sanitizers.strip_brace_terms - selection: + options: members: False - rendering: heading_level: 6 + docstring_section_style: spacy ##### tag-analyzer-by-language ::: nominatim.tokenizer.sanitizers.tag_analyzer_by_language - selection: + options: members: False - rendering: heading_level: 6 + docstring_section_style: spacy ##### clean-housenumbers ::: nominatim.tokenizer.sanitizers.clean_housenumbers - selection: + options: members: False - rendering: heading_level: 6 + docstring_section_style: spacy +##### clean-postcodes + +::: nominatim.tokenizer.sanitizers.clean_postcodes + options: + members: False + heading_level: 6 + docstring_section_style: spacy + +##### clean-tiger-tags + +::: nominatim.tokenizer.sanitizers.clean_tiger_tags + options: + members: False + heading_level: 6 + docstring_section_style: spacy + +#### delete-tags + +::: nominatim.tokenizer.sanitizers.delete_tags + options: + members: False + heading_level: 6 + docstring_section_style: spacy + +#### tag-japanese + +::: nominatim.tokenizer.sanitizers.tag_japanese + options: + members: False + heading_level: 6 + docstring_section_style: spacy #### Token Analysis @@ -222,8 +253,12 @@ 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 -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 @@ -356,6 +391,14 @@ house numbers of the form '3 a', '3A', '3-A' etc. are all considered equivalent. 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