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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN//2.0"><HTML><HEAD><TITLE>Help on Searching</TITLE></HEAD><BODY><I>NCSTRL Documentation</I><HR><H2>Help on Searching</H2>You can search for a document with either a <!WA0><!WA0><!WA0><!WA0><A HREF="#simple">simplesearch</A> or a <!WA1><!WA1><!WA1><!WA1><A HREF="#fielded">fielded search</A>.<H3><A NAME="simple">Simple Search</A></H3>Simple search consists of a single text entry box on the NCSTRL serverhome page. Enter keywords in this box <I>(e.g., "digitallibrary")</I> to search the author, title,and abstract fields of the bibliographic entries for technicalreports. The entireNCSTRL collection is searched. The search returns documents whosebibliographic entries contain all the words you enter in either theauthor, title, or abstract fields. <H3><A NAME="fielded">Fielded Search</A></H3>The fielded search form has three logical components. First, thereare three text entry fields for bibliographic keyword entry, and tworadio buttons to specify whether the keywords entered should be"anded" or "ored" together. Second, there is a menu of the publishersin the NCSTRL collection, and a check box to use all publishers.Finally, there is a text entry field in which you may specify adocument identifer. <P>To specify search criteria, do the following:<OL><LI> If you wish to specify search criteria based on bibliographickeywords (author, title or abstract), fill one of the keyword fields (see the <!WA2><!WA2><!WA2><!WA2><A HREF="#rules">rulesfor bibliographic keyword matching</A>) :<UL><LI><i>Author</I> - The author's first or last name or names .<LI><i>Title</i> - The words in the title of the document.<LI><i>Abstract</i> - The words in the abstract of the document.</UL>and select the "AND" or "OR" radio button.<LI> Select at least oneof the publishers from the list on the form, or select the<i>checkbox</i> to search all publishers. Unfortunately, each Webbrowser has a different rule for multiple selections in a menu.Consult the documentation for your browser for help with this.<LI><i>Document Identifier</i> - The identifying "name" of the document,unique for any given publisher. Your entry will be matched againstany substring of the document identifiers; <i>e.g.,</i> the entry "94"will match "94-1435" and "89-194". A document identifier entry isalways "anded" to bibliographic keyword entries; <I>i.e.,</I> onlydocuments which meet the bibliographic keyword criteria and thedocument name criteria will be returned.</OL>Please take note <b>that not all documents in the collection have abstracts</B>. If you want your search request to include documents without abstracts, enter your search criteria under <i>Title</i> as well as <i>Abstract</i>.<br><br>Your search criteria will be rejected if you don't select at least onepublisher (or the "all" checkbox), and specify at least onebibliographic keyword or a document identifier. <h3> <A NAME="rules">Rules for bibliographic keyword matching</A></h3>Words that you enter in the three bibliographic keyword fields(<i>Author</i>, <i>Title</i>, <i>Abstract</i>) are matched tobibliographic entries according to the following rules:<ul><li>Each word that you enter matches any word in the respective fieldthat begins with respective word. For example, the word "comp"matches "computer", "computation", "comprehensive", etc.<P><li>You may choose either the logical connector <tt>AND</tt> or<tt>OR</tt> between the bibliographic keyword fields by using one ofthe radio buttons below the fields. For example, if you select the<i>or</i> button and the word "robot" in the <i>Title</i> field and"robotics" in the <i>Abstract</i> field, the search will returndocuments that have either "robot" in their titles or "robotics" intheir abstracts. If you select the <i>and</i> button, the search willreturn only those documents that have "robot" in their titles and "robotics" intheir abstracts.<P><li>You may also use logical connectors "and" and "or" within fields.For example, if you enter "robotics or vision" in the <i>abstract</i> field,the search will return documents that have the word "robotics" or"vision" in their abstracts. If you enter "robotics and vision" in the <i>abstract</i> field,the search will return documents that have both the word "robotics" and"vision" in their abstracts. Multiple words that are not separated by"and" are assumed to be "and" separated. For example, if you enter"computer vision" in the <i>abstract</i> field, the search will returndocuments that have both the words "computer" and "vision" in theirabstracts. Finally, you may use parentheses to group words. Forexample, if you enter "Gries or (Teitelbaum and Field)" in the<i>author</i> field, the search will return documents authored by"Gries" or by "Teitelbaum" and "Field".</ul><b>Note:</b> Do not use short, common words or single letters in thebibliographic keyword fields (<i>e.g.,</i> "the", "a", "s"). You willbe asked to re-eenter your search if the keyword you enter matches toomany words in the database.<P><!WA3><!WA3><!WA3><!WA3><A HREF="http://cs-tr.cs.cornell.edu/Dienst/htdocs/document_menu.html"><!WA4><!WA4><!WA4><!WA4><IMG SRC="http://cs-tr.cs.cornell.edu/Dienst/htdocs/image_gif/back.xbm"> Up to Main Information Menu</A><HR><I><!WA5><!WA5><!WA5><!WA5><img align=left src="http://cs-tr.cs.cornell.edu/Dienst/htdocs/image_gif/sm_ncstrl.gif"><B>NCSTRL Documentation</B><BR> Any comments or questions? <BR>Contact us at <!WA6><!WA6><!WA6><!WA6><A HREF="mailto:help@ncstrl.org">help@ncstrl.org.</A> </I></BODY></HTML>⌨️ 快捷键说明
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