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Results per page

Searching method

This system adopts the full-text search engine of the N-gram method.
N-gram method enables searching without missing any words.

Search expression

Searching by a single word

It is the most basic searching method. Example:

N-gram

AND-searching

It matches the document which contains both two words. It is helpful to narrow down a search. You can designate more than 3 words. Insert " "(blank) between the words. Example:

Linux Netscape

OR-searching

It matches the document which contains at least one word of two. You can designate more than 3 words. Insert "or" between the words. Example:

Linux or FreeBSD

NOT-searching

It matches the document which contains the first word and does not contain the second word. You can designate more than 3 words. Insert "!" between the words. Example:

Linux ! UNIX

The order of priority of conditions

OR-searching will have a priority. Example:

Linux or FreeBSD Windows

This will be search that contains "Linux" and "Windows" or "FreeBSD" and "Windows".

Notation

  • This searching method is case insensitive.

Relation search

Relation search is a function that search related themes by measuring distance between themes with weight of words in themes.
Generic Engine for Transposable Association (GETA) has been developed under the auspices of Dokusouteki Jouhougijutu Ikusei Jigyo (Innovative Inforamtion Technology Incubation Project) of IPA (Information-technology Promotion Agency of Japan).
Powerd by GETA

Related words: topic words abstracted from related search results.
Related words in Wikipedia: topic words abstracted from related search results in Wikipedia.

You can do AND-search by deleting "OR" after you search.
(If you change the size of the word, the checkboxes may get out of the position. Please reload the page.)

Notes

  • Upper case and lower case will be ignored.
  • Length of search query is limited to 320 letters.