tailieunhanh - cyberage books the extreme searcher_s internet handbook phần 3

Các tính năng quan trọng nhất ở đây là: 1. Một hộp tìm kiếm mà cung cấp cho các tùy chọn tìm kiếm toàn bộ thư mục hay chỉ là loại hiện nay. 2. Một lời nhắc nhở, dưới hộp tìm kiếm, bạn đang ở đâu trong hệ thống phân cấp chủ đề, mỗi phần có thể click được, | 34 The Extreme Searcher s Internet Handbook The most significant features here are 1. A search box that gives the option of searching the entire directory or just the current category. 2. A reminder under the search box of where you are in the subject hierarchy each section being clickable allowing you to move back up the hierarchy easily. 3. The subject hierarchy is followed by a list of the subcategories and usually a See also list of categories. The latter points to other sections in the Open Directory as does the @ sign that occurs after some of the subcategories. 4. If the directory database contains articles on this topic in languages other than English you will see a listing for This category in other languages. 5. Following that will be the listings of the sites themselves with brief annotations. 6. Unique to Open Directory is the Descriptions link in the upper righthand corner of the page. Clicking on this will take you to a scope note defining what kinds of things are placed in this category. 7. Not shown in the figure. At the bottom of the pages are links to search engines and even to Yahoo . Clicking the links will cause the name of the current category to be searched in these tools. Searching Open Directory The Open Directory database can be searched using either the search box found on the main page at the top of directory pages and at the bottom of search results pages. Search syntax is a bit more sophisticated than that offered by Yahoo Multiple terms are automatically ANDed. Eastern Europe will get only those items containing both terms capitalization is ignored . The automatic AND can be overridden by use of an OR capitalization not required . For example cycling OR bicycling. You can specify a phrase using quotation marks . Native American. A minus sign or andnot will exclude a term . vienna -virginia will eliminate records containing the term virginia from the listing of Web sites but not from categories . Prefixes can be used to limit .

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