WARNING: Version 2.4 of Elasticsearch has passed its EOL date.
This documentation is no longer being maintained and may be removed. If you are running this version, we strongly advise you to upgrade. For the latest information, see the current release documentation.
A tokenizer of type
letter that divides text at non-letters. That’s to
say, it defines tokens as maximal strings of adjacent letters. Note,
this does a decent job for most European languages, but does a terrible
job for some Asian languages, where words are not separated by spaces.