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<meta name="robots" content="INDEX,FOLLOW,NOARCHIVE" /><meta name="citation_title" content="Entrez Help" /><meta name="citation_publisher" content="National Center for Biotechnology Information (US)" /><meta name="citation_date" content="2005" /><meta name="citation_fulltext_html_url" content="https://www.ncbi.nlm.nih.gov/books/NBK3836/" /><link rel="schema.DC" href="http://purl.org/DC/elements/1.0/" /><meta name="DC.Title" content="Entrez Help" /><meta name="DC.Type" content="Text" /><meta name="DC.Publisher" content="National Center for Biotechnology Information (US)" /><meta name="DC.Date" content="2005" /><meta name="DC.Identifier" content="https://www.ncbi.nlm.nih.gov/books/NBK3836/" /><meta name="description" content="This book contains information on Entrez, the indexing and data retrieval system developed by the National Center for Biotechnology Information (NCBI)." /><meta name="og:title" content="Entrez Help" /><meta name="og:type" content="book" /><meta name="og:description" content="This book contains information on Entrez, the indexing and data retrieval system developed by the National Center for Biotechnology Information (NCBI)." /><meta name="og:url" content="https://www.ncbi.nlm.nih.gov/books/NBK3836/" /><meta name="og:site_name" content="NCBI Bookshelf" /><meta name="og:image" content="https://www.ncbi.nlm.nih.gov/corehtml/pmc/pmcgifs/bookshelf/thumbs/th-helpentrez-lrg.png" /><meta name="twitter:card" content="summary" /><meta name="twitter:site" content="@ncbibooks" /><meta name="bk-non-canon-loc" content="/books/n/helpentrez/toc/" /><link rel="canonical" href="https://www.ncbi.nlm.nih.gov/books/NBK3836/" /><link rel="stylesheet" href="/corehtml/pmc/css/figpopup.css" type="text/css" media="screen" /><link rel="stylesheet" href="/corehtml/pmc/css/bookshelf/2.26/css/books.min.css" type="text/css" /><link rel="stylesheet" href="/corehtml/pmc/css/bookshelf/2.26/css/books_print.min.css" type="text/css" /><style type="text/css">p a.figpopup{display:inline !important} .bk_tt {font-family: monospace} .first-line-outdent .bk_ref {display: inline} </style><script type="text/javascript" src="/corehtml/pmc/js/jquery.hoverIntent.min.js"> </script><script type="text/javascript" src="/corehtml/pmc/js/common.min.js?_=3.18"> </script><script type="text/javascript">window.name="mainwindow";</script><script type="text/javascript" src="/corehtml/pmc/js/bookshelf/2.26/books.min.js"> </script>
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<div class="main-content lit-style" itemscope="itemscope" itemtype="http://schema.org/Book"><div class="meta-content fm-sec"><div class="iconblock whole_rhythm clearfix no_top_margin"><a href="http://www.ncbi.nlm.nih.gov/sites/gquery" title="National Center for Biotechnology Information (US)" class="img_link icnblk_img" ref="pagearea=logo&targetsite=external&targetcat=link&targettype=publisher"><img class="source-thumb" src="/corehtml/pmc/pmcgifs/bookshelf/thumbs/th-helpentrez-lrg.png" alt="Cover of Entrez Help" /></a><div class="icnblk_cntnt"><h1 id="_NBK3836_"><span itemprop="name">Entrez Help</span></h1><div class="half_rhythm">Bethesda (MD): <a href="http://www.ncbi.nlm.nih.gov/" ref="pagearea=meta&targetsite=external&targetcat=link&targettype=publisher"><span itemprop="publisher">National Center for Biotechnology Information (US)</span></a>; <span itemprop="datePublished">2005</span>-.</div><div><a href="/books/about/copyright/">Copyright Notice</a></div></div></div></div><div class="body-content whole_rhythm" itemprop="text"><div itemprop="description"><p>This book contains information on Entrez, the indexing and data retrieval system
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developed by the National Center for Biotechnology Information (NCBI). </p></div><div><h2>Contents</h2><ul id="toc_tllNBK3836_toc_EntrezHelp" class="simple-list toc"><li class="half_rhythm" id="toc_itm_NBK3836_toc_EntrezHelp"><a class="toc-item" href="/books/n/helpentrez/EntrezHelp/">Entrez Help</a><div>Peter Cooper and Monica Romiti.</div><div class="small">Created: January 20, 2006; Last Update: June 27, 2024.</div><ul id="toc_lst_NBK3836_toc_EntrezHelp" class="simple-list toc"><li class="half_rhythm" id="toc_itm_NBK3836_toc_EntrezHelp_The_Entrez_Databases"><a class="toc-item" href="/books/n/helpentrez/EntrezHelp/#EntrezHelp.The_Entrez_Databases">The Entrez Databases</a></li><li class="half_rhythm" id="toc_itm_NBK3836_toc_EntrezHelp_Access_to_the_Entrez_System"><a class="toc-item" href="/books/n/helpentrez/EntrezHelp/#EntrezHelp.Access_to_the_Entrez_System">Access to the Entrez System</a></li><li class="half_rhythm" id="toc_itm_NBK3836_toc_EntrezHelp_Entrez_Searching_Options"><a class="toc-item" href="/books/n/helpentrez/EntrezHelp/#EntrezHelp.Entrez_Searching_Options">Entrez Searching Options</a></li><li class="half_rhythm" id="toc_itm_NBK3836_toc_EntrezHelp_Displaying_and_Saving_a_Set_o"><a class="toc-item" href="/books/n/helpentrez/EntrezHelp/#EntrezHelp.Displaying_and_Saving_a_Set_o">Displaying and Saving a Set of Records</a></li><li class="half_rhythm" id="toc_itm_NBK3836_toc_EntrezHelp_Related_data_Neighbors_and_Li"><a class="toc-item" href="/books/n/helpentrez/EntrezHelp/#EntrezHelp.Related_data_Neighbors_and_Li">Related data: Neighbors and Links</a></li><li class="half_rhythm" id="toc_itm_NBK3836_toc_EntrezHelp_Creating_Links_to_Web_Pages_i"><a class="toc-item" href="/books/n/helpentrez/EntrezHelp/#EntrezHelp.Creating_Links_to_Web_Pages_i">Creating Links to Web Pages in the Entrez System</a></li><li class="half_rhythm" id="toc_itm_NBK3836_toc_EntrezHelp_Linking_to_Records_in_the_Ent"><a class="toc-item" href="/books/n/helpentrez/EntrezHelp/#EntrezHelp.Linking_to_Records_in_the_Ent">Linking to Records in the Entrez System</a></li><li class="half_rhythm" id="toc_itm_NBK3836_toc_EntrezHelp_Programmatic_Access_to_the_En"><a class="toc-item" href="/books/n/helpentrez/EntrezHelp/#EntrezHelp.Programmatic_Access_to_the_En">Programmatic Access to the Entrez System</a></li></ul></li></ul></div></div></div>
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