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<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"/><title>5&nbsp;Acknowledgments</title><link rel="stylesheet" type="text/css" href="../scribble.css" title="default"/><link rel="stylesheet" type="text/css" href="../racket.css" title="default"/><link rel="stylesheet" type="text/css" href="../manual-style.css" title="default"/><link rel="stylesheet" type="text/css" href="../manual-racket.css" title="default"/><link rel="stylesheet" type="text/css" href="../doc-site.css" title="default"/><script type="text/javascript" src="../scribble-common.js"></script><script type="text/javascript" src="../manual-racket.js"></script><script type="text/javascript" src="../doc-site.js"></script><script type="text/javascript" src="../local-redirect/local-redirect.js"></script><script type="text/javascript" src="../local-redirect/local-user-redirect.js"></script><!--[if IE 6]><style type="text/css">.SIEHidden { overflow: hidden; }</style><![endif]--></head><body id="doc-racket-lang-org"><div class="tocset"><div class="tocview"><div class="tocviewlist tocviewlisttopspace"><div class="tocviewtitle"><table cellspacing="0" cellpadding="0"><tr><td style="width: 1em;"><a href="javascript:void(0);" title="Expand/Collapse" class="tocviewtoggle" onclick="TocviewToggle(this,&quot;tocview_0&quot;);">&#9660;</a></td><td></td><td><a href="index.html" class="tocviewlink" data-pltdoc="x">Datalog:<span class="mywbr"> &nbsp;</span> Deductive Database Programming</a></td></tr></table></div><div class="tocviewsublistonly" style="display: block;" id="tocview_0"><table cellspacing="0" cellpadding="0"><tr><td align="right">1&nbsp;</td><td><a href="datalog.html" class="tocviewlink" data-pltdoc="x">Datalog Module Language</a></td></tr><tr><td align="right">2&nbsp;</td><td><a href="Tutorial.html" class="tocviewlink" data-pltdoc="x">Tutorial</a></td></tr><tr><td align="right">3&nbsp;</td><td><a href="Parenthetical_Datalog_Module_Language.html" class="tocviewlink" data-pltdoc="x">Parenthetical Datalog Module Language</a></td></tr><tr><td align="right">4&nbsp;</td><td><a href="interop.html" class="tocviewlink" data-pltdoc="x">Racket Interoperability</a></td></tr><tr><td align="right">5&nbsp;</td><td><a href="" class="tocviewselflink" data-pltdoc="x">Acknowledgments</a></td></tr></table></div></div></div></div><div class="maincolumn"><div class="main"><div class="navsettop"><span class="navleft"><form class="searchform"><input class="searchbox" style="color: #888;" type="text" value="...search manuals..." title="Enter a search string to search the manuals" onkeypress="return DoSearchKey(event, this, &quot;6.7&quot;, &quot;../&quot;);" onfocus="this.style.color=&quot;black&quot;; this.style.textAlign=&quot;left&quot;; if (this.value == &quot;...search manuals...&quot;) this.value=&quot;&quot;;" onblur="if (this.value.match(/^ *$/)) { this.style.color=&quot;#888&quot;; this.style.textAlign=&quot;center&quot;; this.value=&quot;...search manuals...&quot;; }"/></form>&nbsp;&nbsp;<a href="../index.html" title="up to the documentation top" data-pltdoc="x" onclick="return GotoPLTRoot(&quot;6.7&quot;);">top</a></span><span class="navright">&nbsp;&nbsp;<a href="interop.html" title="backward to &quot;4 Racket Interoperability&quot;" data-pltdoc="x">&larr; prev</a>&nbsp;&nbsp;<a href="index.html" title="up to &quot;Datalog: Deductive Database Programming&quot;" data-pltdoc="x">up</a>&nbsp;&nbsp;<span class="nonavigation">next &rarr;</span></span>&nbsp;</div><h3 x-source-module="(lib &quot;datalog/scribblings/datalog.scrbl&quot;)" x-source-pkg="datalog" x-part-tag="&quot;Acknowledgments&quot;">5<tt>&nbsp;</tt><a name="(part._.Acknowledgments)"></a>Acknowledgments</h3><p>This package was once structurally based on Dave Herman&rsquo;s <span class="RktPn">(</span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&amp;rel=require.html%23%2528form._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._planet%2529%2529&amp;version=6.7" class="RktStxLink Sq" data-pltdoc="x">planet</a></span><span class="stt"> </span><span class="RktSym">dherman/javascript</span><span class="RktPn">)</span> library and
John Ramsdell&rsquo;s <a href="http://www.ccs.neu.edu/home/ramsdell/tools/datalog/datalog.html">Datalog library</a>.</p><p>The package uses the tabled logic programming algorithm described in
<a href="http://scholar.google.com/scholar?q=author:%22Chen%22+intitle:%22Efficient+top-down+computation+of+queries+under+the+...%22+&amp;oi=scholarr">Efficient Top-Down Computation of Queries under the Well-Founded Semantics</a> by W. Chen, T. Swift, and D. S. Warren.
Another important reference is
<a href="http://portal.acm.org/citation.cfm?id=227597">Tabled Evaluation with Delaying for General Logic Programs</a> by W. Chen and D. S. Warren.
Datalog is described in
<a href="http://doi.ieeecomputersociety.org/10.1109/69.43410">What You Always Wanted to Know About Datalog (And Never Dared to Ask)</a>
by Stefano Ceri, Georg Gottlob, and Letizia Tanca.</p><div class="navsetbottom"><span class="navleft"><form class="searchform"><input class="searchbox" style="color: #888;" type="text" value="...search manuals..." title="Enter a search string to search the manuals" onkeypress="return DoSearchKey(event, this, &quot;6.7&quot;, &quot;../&quot;);" onfocus="this.style.color=&quot;black&quot;; this.style.textAlign=&quot;left&quot;; if (this.value == &quot;...search manuals...&quot;) this.value=&quot;&quot;;" onblur="if (this.value.match(/^ *$/)) { this.style.color=&quot;#888&quot;; this.style.textAlign=&quot;center&quot;; this.value=&quot;...search manuals...&quot;; }"/></form>&nbsp;&nbsp;<a href="../index.html" title="up to the documentation top" data-pltdoc="x" onclick="return GotoPLTRoot(&quot;6.7&quot;);">top</a></span><span class="navright">&nbsp;&nbsp;<a href="interop.html" title="backward to &quot;4 Racket Interoperability&quot;" data-pltdoc="x">&larr; prev</a>&nbsp;&nbsp;<a href="index.html" title="up to &quot;Datalog: Deductive Database Programming&quot;" data-pltdoc="x">up</a>&nbsp;&nbsp;<span class="nonavigation">next &rarr;</span></span>&nbsp;</div></div></div><div id="contextindicator">&nbsp;</div></body></html>