Full Text Search - Mailing list pgsql-docs

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Subject Full Text Search
Date
Msg-id 169857852829.1769273.13565705789621518957@wrigleys.postgresql.org
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Responses Re: Full Text Search
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The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/14/textsearch-limitations.html
Description:

Hello,

In the FTS/Limitations part of the documentation, it says :

"Another example — the PostgreSQL mailing list archives contained 910,989
unique words with 57,491,343 lexemes in 461,020 messages."

How could the number of lexemes be greater than unique words ?

Thank you
Julien

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