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doc: add material on stemming and wildcards

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This is lightly massaged from the searching page on the wiki.
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David Bremner 2015-01-18 13:59:30 +01:00
parent 647c0b0692
commit 7fa58b792c
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doc/man7/notmuch-search-terms.rst
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@ -135,6 +135,33 @@ operators, but will have to be protected from interpretation by the
shell, (such as by putting quotation marks around any parenthesized
expression).
Stemming
--------
**Stemming** in notmuch means that these searches
::
notmuch search detailed
notmuch search details
notmuch search detail
will all return identical results, because Xapian first "reduces" the
term to the common stem (here 'detail') and then performs the search.
There are two ways to turn this off: a search for a capitalized word
will be performed unstemmed, so that one can search for "John" and not
get results for "Johnson"; phrase searches are also unstemmed (see
below for details). Stemming is currently only supported for
English. Searches for words in other languages will be performed unstemmed.
Wildcards
---------
It is possible to use a trailing '\*' as a wildcard. A search for
'wildc\*' will match 'wildcard', 'wildcat', etc.
Boolean and Probabilistic Prefixes
----------------------------------