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Use the form below to search for documents in this web containing specific words or combinations of words. The text search engine will display a weighted list of matching documents, with better matches shown first. Each list item is a link to a matching document; if the document has a title it will be shown, otherwise only the document's file name is displayed. A brief explanation of the query language is available, along with examples.

搜索内容:

Query Language语言问题

The text search engine allows queries to be formed from arbitrary Boolean expressions containing the keywords AND, OR, and NOT, and grouped with parentheses. For example:

文字搜索准许用各种各样的疑问字如:AND、OR、AND NOT,和成组的问题,例如:

information retrieval资料恢复
finds documents containing 'information' or 'retrieval'

information or retrieval资料或恢复
same as above

information and retrieval资料和恢复
finds documents containing both 'information' and 'retrieval'

information not retrieval资料不恢复
finds documents containing 'information' but not 'retrieval'

(information not retrieval) and WAIS信息系统
finds documents containing 'WAIS', plus 'information' but not 'retrieval'

web*
finds documents containing words starting with 'web'

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