Help for Searching CryoNet Messages
- liquid nitrogen
- cold room LN2
More details on how CryoNet message searching works
The search finds the messages that contain all the search
It thus computes an AND operation on the search terms;
it does not support OR or NOT operations
or more complex boolean combinations of search terms.
Also, currently, the order of the search terms does not matter.
The search considers upper case and lower case characters equivalent.
"CRYONICS" and "cryonics" thus match the same messages.
Only letters, digits, and underbars are considered parts of search terms;
all other characters are ignored.
Thus "email@example.com" translates to the three terms "abc xyz com".
It usually is not necessary to conduct separate searches for the
variations of a word, such as "advance", "advances", "advancing",
since the search code converts each search term to its stem
Porter stemming algorithm.
Commonly used terms, such as "and", are filtered out of searches.
Also, very short (one or two character) and long words are ignored.
Search results can be sorted three different ways:
- relevance - sorted by "relevance" score, based on word position
within the message, number of occurences within the message,
and proximity of terms within the message.
The proximity rating approximates phrase searching,
since phrases containing exactly the search terms
will have higher ratings.
- oldest first - sorted by message number in increasing order
- newest first - sorted by message number in decreasing order
The HTML files at the CryoNet web site are not indexed;
only the message files can be searched.
There are no searches specifically for words in the sender or subject lines,
although the "relevance" sort option tends to favor words in the
message headers since they are near the beginning of the messages.
If you use the Advanced Search Form ,
the search options you choose will be "sticky"; they will be retained
in the search form generated with the search results.
The original indexing and search code were taken from the article
"Roll Your Own Search Engine",
which gives a simple Perl implementation.
Subsequent enhancements have made the code no longer recognizable
as that simple search engine.
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