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document the new analysis-phonenumber
plugin
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--- | ||
layout: default | ||
title: Phone number | ||
parent: Analyzers | ||
nav_order: 140 | ||
--- | ||
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# Phone number analyzers | ||
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The `analysis-phonenumber` plugin provides analyzers and tokenizers for parsing phone numbers. A dedicated analyzer is required because parsing phone numbers is a non-trivial task (even though it might seem trivial at first glance). For common misconceptions regarding phone number parsing, see [Falsehoods programmers believe about phone numbers](https://github.com/google/libphonenumber/blob/master/FALSEHOODS.md). | ||
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OpenSearch supports the following phone number analyzers: | ||
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* [`phone`](#the-phone-analyzer): An [index analyzer]({{site.url}}{{site.baseurl}}/analyzers/index-analyzers/) to use at indexing time. | ||
* [`phone-search`](#the-phone-search-analyzer): A [search analyzer]({{site.url}}{{site.baseurl}}/analyzers/search-analyzers/) to use at search time. | ||
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Internally, the plugin uses the [`libphonenumber`](https://github.com/google/libphonenumber) library and follows its parsing rules. | ||
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The phone number analyzers are not meant to find phone numbers in larger texts. Instead, you should use them on fields that only contain phone numbers. | ||
{: .note} | ||
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## Installing the plugin | ||
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Before you can use the phone number analyzers, you must install the `analysis-phonenumber` plugin by running the following command: | ||
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```sh | ||
./bin/opensearch-plugin install analysis-phonenumber | ||
``` | ||
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## Specifying a default region | ||
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You can optionally specify a default region for parsing phone numbers by providing the `phone-region` parameter within the analyzer. Valid phone regions are represented by ISO 3166 country codes. For more information, see [List of ISO 3166 country codes](https://en.wikipedia.org/wiki/List_of_ISO_3166_country_codes). | ||
Check warning on line 33 in _analyzers/supported-analyzers/phone-analyzers.md GitHub Actions / style-job
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When tokenizing phone numbers containing the international calling prefix `+`, the default region is irrelevant. However, for phone numbers that use a national prefix for international numbers (for example, `001` instead of `+1` to dial Northern America from most European countries), the region needs to be provided. You can also properly index local phone numbers with no international prefix by specifying the region. | ||
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## Example | ||
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The following request creates an index containing one field that ingests phone numbers for Switzerland (region code `CH`): | ||
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```json | ||
PUT /example-phone | ||
{ | ||
"settings": { | ||
"analysis": { | ||
"analyzer": { | ||
"phone-ch": { | ||
"type": "phone", | ||
"phone-region": "CH" | ||
}, | ||
"phone-search-ch": { | ||
"type": "phone-search", | ||
"phone-region": "CH" | ||
} | ||
} | ||
} | ||
}, | ||
"mappings": { | ||
"properties": { | ||
"phoneNumber": { | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. btw: do examples usually use There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. In general, OpenSearch uses There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. so this should be There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Ideally, it should all be snake case, so yes, |
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"type": "text", | ||
"analyzer": "phone-ch", | ||
"search_analyzer": "phone-search-ch" | ||
} | ||
} | ||
} | ||
} | ||
``` | ||
{% include copy-curl.html %} | ||
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## The phone analyzer | ||
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The `phone` analyzer generates n-grams based on the given phone number. A (fictional) Swiss phone number containing an international calling prefix can be parsed with or without the Swiss-specific phone region. Thus, the following two requests will produce the same result: | ||
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```json | ||
GET /example-phone/_analyze | ||
{ | ||
"analyzer" : "phone-ch", | ||
"text" : "+41 60 555 12 34" | ||
} | ||
``` | ||
{% include copy-curl.html %} | ||
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```json | ||
GET /example-phone/_analyze | ||
{ | ||
"analyzer" : "phone", | ||
"text" : "+41 60 555 12 34" | ||
} | ||
``` | ||
{% include copy-curl.html %} | ||
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The response contains the generated n-grams: | ||
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```json | ||
["+41 60 555 12 34", "6055512", "41605551", "416055512", "6055", "41605551234", ...] | ||
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``` | ||
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However, if you specify the phone number without the international calling prefix `+` (either by using `0041` or omitting | ||
the international calling prefix altogether), then only the analyzer configured with the correct phone region can parse the number: | ||
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```json | ||
GET /example-phone/_analyze | ||
{ | ||
"analyzer" : "phone-ch", | ||
"text" : "060 555 12 34" | ||
} | ||
``` | ||
{% include copy-curl.html %} | ||
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## The phone-search analyzer | ||
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In contrast, the `phone-search` analyzer does not create n-grams and only issues some basic tokens. Thus, the following request: | ||
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```json | ||
GET /example-phone/_analyze | ||
{ | ||
"analyzer" : "phone-search", | ||
"text" : "+41 60 555 12 34" | ||
} | ||
``` | ||
{% include copy-curl.html %} | ||
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Is parsed into the following tokens: | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. i had There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. @rursprung I'm not a huge fan of the split-sentence structure, generally, and would prefer that we not use it because it results in this type of issue (case in point: I'd prefer that new lines/sentences/phrases not begin with lowercase letters). |
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```json | ||
["+41 60 555 12 34", "41 60 555 12 34", "41605551234", "605551234", "41"] | ||
``` |
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i'm not a native speaker, but i'd have expected "[..] the list [..]" here? (it probably was me who wrote it like this in the first place? 🫣)
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@rursprung Either way is correct 😄