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Single term query |
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The query specifies only one term for retrieving all documents
which contain the term.
e.g., namazu |
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AND query |
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The query specifies two or more terms for retrieving all
documents which contain both terms. You can insert the and operator between
the terms.
e.g., Linux and Netscape
You can omit the and operator. Terms which is
separated by one ore more spaces is assumed to be AND query. |
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OR query |
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The query specifies two or more terms for retrieving all
documents which contain either term. You can insert the or operator between
the terms.
e.g., Linux or FreeBSD |
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NOT query |
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The query specifies two or more terms for retrieving all
documents which contain a first term but doesn't contain the following
terms. You can insert the not operator between the terms to do NOT query.
e.g., Linux not UNIX |
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Grouping |
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You can group queries by surrounding them by parentheses.
The parentheses should be separated by one or more spaces.
e.g., ( Linux or FreeBSD ) and Netscape not Windows |
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Phrase searching |
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You can search for a phrase which consists of two or more
terms by surrounding them with double quotes like "..." or
with braces like {...}. In Namazu, precision of phrase searching is not
100 %, so it causes wrong results occasionally.
e.g., {GNU Emacs} |
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Substring matching |
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The are three types of substring matching searching.
Prefix matching
inter* (terms which begin with inter)
Inside matching
*text*(terms which contain text)
Suffix matching
*net (terms which terminated with net) |
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Regular expressions |
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You can use regular expressions for pattern matching. The
regular expressions must be surrounded by slashes like /.../. Namazu
uses Ruby's regular regular expressions engine. It offers generally Perl compatible flavor.
e.g., /pro(gram|blem)s?/ |
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Field-specified searching |
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You can limit your search to specific fields such as Subject:,
From:, Message-Id:. It's especially convenient for Mail/News documents.
e.g., |
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- +subject:Linux
(Retrieving all documents which contain Linux in a Subject: field)
- +subject:"GNU Emacs"
(Retrieving all documents which contain GNU Emacs in a Subject: field)
- +from:foo@bar.jp
(Retrieving all documents which contain foo@bar.jp in a From: field)
- +message-id:<199801240555.OAA18737@foo.bar.jp>
(Retrieving a certain document which contains specified Message-Id:)
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Notes |
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- In any queries, Namazu ignores case distinctions of alphabet
characters. In other words, Namazu does case-insensitive pattern matching
in any time.
- Japanese phrases are forced to be segmented into morphemes automatically
and are handled them as phrase searching. This processing causes
invalid segmentation occasionally.
- Alphabet, numbers or a part of symbols (duplicated in ASCII) characters
which defined in JIS X 0208 (Japanese Industrial Standards) are
handled as ASCII characters.
- Namazu can handle a term which contains symbols like TCP/IP.
Since this handling isn't complete, you can describe TCP
and IP instead
of TCP/IP,
but it may cause noisy results.
- Substring matching and field-specified searching takes more
time than other methods.
- If you want to use and, or or not simply as terms, you can
surround them respectively with double quotes like "..." or braces
like {...}.
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