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</div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox vevent"><caption class="infobox-title summary">HaXml</caption><tbody><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Programmer" title="Programmer">Original author(s)</a></th><td class="infobox-data">Malcolm Wallace</td></tr><tr style="display: none;"><td colspan="2" class="infobox-full-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1257001546"></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_release_life_cycle" title="Software release life cycle">Stable release</a></th><td class="infobox-data"><div style="margin:0px;">v1.25.13<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> / July 13, 2023<span class="noprint">; 16 months ago</span><span style="display:none"> (<span class="bday dtstart published updated">2023-07-13</span>)</span></div></td></tr><tr style="display:none"><td colspan="2"> </td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Repository_(version_control)" title="Repository (version control)">Repository</a></th><td class="infobox-data"><a rel="nofollow" class="external free" href="https://github.com/HaXml/HaXml">https://github.com/HaXml/HaXml</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Written in</th><td class="infobox-data"><a href="/wiki/Haskell" title="Haskell">Haskell</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_categories#Categorization_approaches" title="Software categories">Type</a></th><td class="infobox-data"><a href="/wiki/Library_(computing)" title="Library (computing)">library</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_license" title="Software license">License</a></th><td class="infobox-data"><a href="/wiki/GNU_Lesser_General_Public_License" title="GNU Lesser General Public License">LGPL 2.1</a></td></tr></tbody></table> <p><b>HaXml</b> is a collection of utilities for <a href="/wiki/Parsing" title="Parsing">parsing</a>, <a href="/wiki/Filter_(higher-order_function)" title="Filter (higher-order function)">filtering</a>, <a href="/wiki/Transformation_(function)" title="Transformation (function)">transforming</a>, and generating Extensible Markup Language (<a href="/wiki/XML" title="XML">XML</a>) documents using the <a href="/wiki/Programming_language" title="Programming language">programming language</a> <a href="/wiki/Haskell" title="Haskell">Haskell</a>.<sup id="cite_ref-zenodo_2-0" class="reference"><a href="#cite_note-zenodo-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Overview">Overview</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=HaXml&action=edit&section=1" title="Edit section: Overview"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>HaXml utilities include:<sup id="cite_ref-zenodo_2-1" class="reference"><a href="#cite_note-zenodo-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <ul><li>XML parser</li> <li>XML validator</li> <li>a separate <a href="/wiki/Error-correcting" class="mw-redirect" title="Error-correcting">error-correcting</a> parser for <a href="/wiki/HTML" title="HTML">HTML</a></li> <li>pretty-printers for XML and HTML</li> <li>stream parser for XML events</li> <li>translator from <a href="/wiki/Document_type_definition" title="Document type definition">DTD</a> to Haskell</li> <li>translator from <a href="/wiki/XML_Schema_(W3C)" title="XML Schema (W3C)">XML Schema definitions</a> to Haskell data types</li></ul> <p>HaXml provides a <a href="/wiki/Fixed-point_combinator" title="Fixed-point combinator">combinator</a> library with a set of <a href="/wiki/Higher-order_function" title="Higher-order function">higher-order functions</a> which process the XML documents after they are represented using the native Haskell <a href="/wiki/Data_type" title="Data type">data types</a>.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> The basic data type is <code>Content</code> which represents the document subset of XML.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>HaXml allows converting XML to Haskell data and vice versa, and XML to XML (by transforming or <a href="/wiki/Filter_(higher-order_function)" title="Filter (higher-order function)">filtering</a>). The common use of the HaXml's parser includes defining the method of traversing the XML data and it has the <code>CFilter</code> type (<i>content filter</i>), where <code>type CFilter = Content -> [Content]</code>. It means that this <a href="/wiki/Function_(computer_programming)" title="Function (computer programming)">function</a> defined by the user will take a fragment of an XML data and either return more fragments or none at all. This approach allows to choose XML elements satisfying certain conditions (e.g., tags with certain name or all children of a specified tag).<sup id="cite_ref-real_6-0" class="reference"><a href="#cite_note-real-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Example">Example</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=HaXml&action=edit&section=2" title="Edit section: Example"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In the chapter 22 "Extended Example: Web Client Programming" of the <a href="/wiki/Real_World_Haskell" title="Real World Haskell">Real World Haskell</a> by Bryan O'Sullivan, Don Stewart, and John Goerzen, the following example is considered.<sup id="cite_ref-real_6-1" class="reference"><a href="#cite_note-real-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> The XML file looks like this (simplified version): </p> <div class="mw-highlight mw-highlight-lang-xml mw-content-ltr" dir="ltr"><pre><span></span><span class="cp"><?xml version="1.0" encoding="UTF-8"?></span> <span class="nt"><rss</span><span class="w"> </span><span class="na">xmlns:itunes=</span><span class="s">"http://www.itunes.com/DTDs/Podcast-1.0.dtd"</span><span class="w"> </span><span class="na">version=</span><span class="s">"2.0"</span><span class="nt">></span> <span class="w"> </span><span class="nt"><channel></span> <span class="w"> </span><span class="nt"><title></span>Haskell<span class="w"> </span>Radio<span class="nt"></title></span> <span class="w"> </span><span class="nt"><link></span>http://www.example.com/radio/<span class="nt"></link></span> <span class="w"> </span><span class="nt"><description></span>Description<span class="w"> </span>of<span class="w"> </span>this<span class="w"> </span>podcast<span class="nt"></description></span> <span class="w"> </span><span class="nt"><item></span>First<span class="w"> </span>item<span class="nt"></item></span> <span class="w"> </span><span class="nt"><item></span>Second<span class="w"> </span>item<span class="nt"></item></span> <span class="w"> </span><span class="nt"></channel></span> <span class="nt"></rss></span> </pre></div> <p>The following content filter is constructed: </p> <div class="mw-highlight mw-highlight-lang-haskell mw-content-ltr" dir="ltr"><pre><span></span><span class="nf">channel</span><span class="w"> </span><span class="ow">::</span><span class="w"> </span><span class="kt">CFilter</span> <span class="nf">channel</span><span class="w"> </span><span class="ow">=</span><span class="w"> </span><span class="n">tag</span><span class="w"> </span><span class="s">"rss"</span><span class="w"> </span><span class="o">/></span><span class="w"> </span><span class="n">tag</span><span class="w"> </span><span class="s">"channel"</span> </pre></div> <p>This filter is later used to get the title of the channel: </p> <div class="mw-highlight mw-highlight-lang-haskell mw-content-ltr" dir="ltr"><pre><span></span><span class="nf">getTitle</span><span class="w"> </span><span class="ow">::</span><span class="w"> </span><span class="kt">Content</span><span class="w"> </span><span class="ow">-></span><span class="w"> </span><span class="kt">String</span> <span class="nf">getTitle</span><span class="w"> </span><span class="n">doc</span><span class="w"> </span><span class="ow">=</span><span class="w"> </span><span class="n">contentToStringDefault</span><span class="w"> </span><span class="s">"Untitled Podcast"</span><span class="w"> </span><span class="p">(</span><span class="n">channel</span><span class="w"> </span><span class="o">/></span><span class="w"> </span><span class="n">tag</span><span class="w"> </span><span class="s">"title"</span><span class="w"> </span><span class="o">/></span><span class="w"> </span><span class="n">txt</span><span class="w"> </span><span class="o">$</span><span class="w"> </span><span class="n">doc</span><span class="p">)</span> </pre></div> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=HaXml&action=edit&section=3" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output 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rel="nofollow" class="external text" href="https://github.com/HaXml/HaXml/releases/tag/v1.25.13">"Release v1.25.13"</a>. <i><a href="/wiki/GitHub" title="GitHub">GitHub</a></i><span class="reference-accessdate">. Retrieved <span class="nowrap">January 10,</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=GitHub&rft.atitle=Release+v1.25.13&rft_id=https%3A%2F%2Fgithub.com%2FHaXml%2FHaXml%2Freleases%2Ftag%2Fv1.25.13&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHaXml" class="Z3988"></span></span> </li> <li id="cite_note-zenodo-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-zenodo_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-zenodo_2-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFGajdaKrylov2020" class="citation journal cs1">Gajda, Michał J.; Krylov, Dmitry (November 5, 2020). "Fast XML/HTML tools for Haskell: XML TypeLift and improved Xeno". <i>Zenodo</i>. <a href="/wiki/ArXiv_(identifier)" class="mw-redirect" title="ArXiv (identifier)">arXiv</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://arxiv.org/abs/2011.03536v1">2011.03536v1</a></span>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.5281%2Fzenodo.3929549">10.5281/zenodo.3929549</a>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:226282051">226282051</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Zenodo&rft.atitle=Fast+XML%2FHTML+tools+for+Haskell%3A+XML+TypeLift+and+improved+Xeno&rft.date=2020-11-05&rft_id=info%3Aarxiv%2F2011.03536v1&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A226282051%23id-name%3DS2CID&rft_id=info%3Adoi%2F10.5281%2Fzenodo.3929549&rft.aulast=Gajda&rft.aufirst=Micha%C5%82+J.&rft.au=Krylov%2C+Dmitry&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHaXml" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://github.com/HaXml/HaXml/blob/main/README">"Readme"</a>. <i><a href="/wiki/GitHub" title="GitHub">GitHub</a></i><span class="reference-accessdate">. Retrieved <span class="nowrap">January 10,</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=GitHub&rft.atitle=Readme&rft_id=https%3A%2F%2Fgithub.com%2FHaXml%2FHaXml%2Fblob%2Fmain%2FREADME&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHaXml" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFMuHuTakeichi" class="citation report cs1">Mu, Shin-Cheng; Hu, Zhenjiang; Takeichi, Masato. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20240110233319/https://takeichi.ipl-lab.org/~scm/pub/icfp05.pdf">Bidirectionalising HaXML</a> <span class="cs1-format">(PDF)</span> (Report). Archived from <a rel="nofollow" class="external text" href="https://takeichi.ipl-lab.org/~scm/pub/icfp05.pdf">the original</a> <span class="cs1-format">(PDF)</span> on January 10, 2024<span class="reference-accessdate">. Retrieved <span class="nowrap">January 10,</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=report&rft.btitle=Bidirectionalising+HaXML&rft.aulast=Mu&rft.aufirst=Shin-Cheng&rft.au=Hu%2C+Zhenjiang&rft.au=Takeichi%2C+Masato&rft_id=https%3A%2F%2Ftakeichi.ipl-lab.org%2F~scm%2Fpub%2Ficfp05.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHaXml" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFOhlendorf2007" class="citation book cs1">Ohlendorf, Manuel (January 6, 2007). <a rel="nofollow" class="external text" href="https://www.fh-wedel.de/fileadmin/FHW-Files/Dokumente_FHW/Forschung/Abgeschlossene_Masterarbeiten/Manuel_Ohlendorf_-_A_Cookbook_for_the_Haskell_XML_Toolbox_with_Examples_for_Processing_RDF_Documents.pdf"><i>A Cookbook for the Haskell XML Toolbox with Examples for Processing RDF Documents</i></a> <span class="cs1-format">(PDF)</span>. fhwedel Computer Science Department. p. 78. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20240113201226/https://www.fh-wedel.de/fileadmin/FHW-Files/Dokumente_FHW/Forschung/Abgeschlossene_Masterarbeiten/Manuel_Ohlendorf_-_A_Cookbook_for_the_Haskell_XML_Toolbox_with_Examples_for_Processing_RDF_Documents.pdf">Archived</a> <span class="cs1-format">(PDF)</span> from the original on January 13, 2024<span class="reference-accessdate">. Retrieved <span class="nowrap">January 13,</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=A+Cookbook+for+the+Haskell+XML+Toolbox+with+Examples+for+Processing+RDF+Documents&rft.pages=78&rft.pub=fhwedel+Computer+Science+Department&rft.date=2007-01-06&rft.aulast=Ohlendorf&rft.aufirst=Manuel&rft_id=https%3A%2F%2Fwww.fh-wedel.de%2Ffileadmin%2FFHW-Files%2FDokumente_FHW%2FForschung%2FAbgeschlossene_Masterarbeiten%2FManuel_Ohlendorf_-_A_Cookbook_for_the_Haskell_XML_Toolbox_with_Examples_for_Processing_RDF_Documents.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHaXml" class="Z3988"></span></span> </li> <li id="cite_note-real-6"><span class="mw-cite-backlink">^ <a href="#cite_ref-real_6-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-real_6-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFO'SullivanGoerzenStewart2008" class="citation book cs1">O'Sullivan, Bryan; Goerzen, John; Stewart, Don (2008). <a rel="nofollow" class="external text" href="https://book.realworldhaskell.org/read/extended-example-web-client-programming.html">"Chapter 22. Extended Example: Web Client Programming"</a>. <i><a href="/wiki/Real_World_Haskell" title="Real World Haskell">Real World Haskell</a></i>. <a href="/wiki/O%27Reilly_Media" title="O'Reilly Media">O'Reilly Media</a>. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-0596514983" title="Special:BookSources/978-0596514983"><bdi>978-0596514983</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=bookitem&rft.atitle=Chapter+22.+Extended+Example%3A+Web+Client+Programming&rft.btitle=Real+World+Haskell&rft.pub=O%27Reilly+Media&rft.date=2008&rft.isbn=978-0596514983&rft.aulast=O%27Sullivan&rft.aufirst=Bryan&rft.au=Goerzen%2C+John&rft.au=Stewart%2C+Don&rft_id=https%3A%2F%2Fbook.realworldhaskell.org%2Fread%2Fextended-example-web-client-programming.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHaXml" class="Z3988"></span></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFWallaceRunciman1999" class="citation journal cs1">Wallace, Malcolm; Runciman, Colin (September 1, 1999). <a rel="nofollow" class="external text" href="https://www.cs.york.ac.uk/plasma/publications/pdf/WallaceRuncimanICFP99.pdf">"Haskell and XML: generic combinators or type-based translation?"</a> <span class="cs1-format">(PDF)</span>. <i>ACM SIGPLAN Notices</i>. <b>34</b> (9): 148–159. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1145%2F317765.317794">10.1145/317765.317794</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=ACM+SIGPLAN+Notices&rft.atitle=Haskell+and+XML%3A+generic+combinators+or+type-based+translation%3F&rft.volume=34&rft.issue=9&rft.pages=148-159&rft.date=1999-09-01&rft_id=info%3Adoi%2F10.1145%2F317765.317794&rft.aulast=Wallace&rft.aufirst=Malcolm&rft.au=Runciman%2C+Colin&rft_id=https%3A%2F%2Fwww.cs.york.ac.uk%2Fplasma%2Fpublications%2Fpdf%2FWallaceRuncimanICFP99.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHaXml" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=HaXml&action=edit&section=4" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><span class="official-website"><span class="url"><a rel="nofollow" class="external text" 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programming</div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Software" title="Software">Software</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Programming_language_implementation" title="Programming language implementation">Implementations</a><br />(<a href="/wiki/Haskell_features" title="Haskell features">features</a>)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Generic_programming#Generic_Haskell" title="Generic programming">Generic Haskell</a>°</li> <li><a href="/wiki/Glasgow_Haskell_Compiler" title="Glasgow Haskell Compiler">Glasgow Haskell Compiler</a>° <ul><li><a href="/wiki/Template_Haskell" title="Template Haskell">Template Haskell</a>°</li></ul></li> <li><i><a href="/wiki/Gofer_(programming_language)" title="Gofer (programming language)">Gofer</a></i>° → <a href="/wiki/Hugs_(interpreter)" title="Hugs (interpreter)">Hugs</a>°</li> <li><i>York Haskell Compiler</i>° (<i><a href="/wiki/Yhc" title="Yhc">Yhc</a></i>)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Dialect_(computing)" class="mw-redirect" title="Dialect (computing)">Dialects</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Agda_(programming_language)" title="Agda (programming language)">Agda</a>°</li> <li><a href="/wiki/Cryptol" title="Cryptol">Cryptol</a>°</li> <li><a href="/wiki/Curry_(programming_language)" title="Curry (programming language)">Curry</a>°</li> <li><a href="/wiki/Elm_(programming_language)" title="Elm (programming language)">Elm</a>°</li> <li><i><a href="/wiki/Hume_(programming_language)" title="Hume (programming language)">Hume</a></i>°</li> <li><a href="/wiki/Idris_(programming_language)" title="Idris (programming language)">Idris</a>°</li> <li><i><a href="/wiki/%CE%A9mega" title="Ωmega">Ωmega</a></i>°</li> <li><i><a href="/wiki/Orwell_(programming_language)" title="Orwell (programming language)">Orwell</a></i>°</li> <li><i><a href="/wiki/Pugs_(compiler)" title="Pugs (compiler)">Pugs</a></i>°</li> <li><a href="/wiki/TidalCycles" title="TidalCycles">TidalCycles</a>°</li> <li><a href="/wiki/Ur_(programming_language)" title="Ur (programming language)">Ur</a>°</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Electronic_design_automation" title="Electronic design automation">Electronic design</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Atom_(programming_language)" title="Atom (programming language)">Atom</a>°</li> <li><a href="/wiki/Bluespec" title="Bluespec">Bluespec</a> <a href="/wiki/SystemVerilog" title="SystemVerilog">SystemVerilog</a> (BSV)</li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Library_(computing)" title="Library (computing)">Libraries</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Concurrent_Haskell" title="Concurrent Haskell">Concurrent Haskell</a>°</li> <li><i><a href="/wiki/Haskell_Platform" title="Haskell Platform">Haskell Platform</a></i>°</li> <li><a href="/wiki/Parsec_(parser)" title="Parsec (parser)">Parsec</a>°</li> <li><a href="/wiki/QuickCheck" title="QuickCheck">QuickCheck</a>°</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Package_manager" title="Package manager">Package managers</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Cabal_(software)" title="Cabal (software)">Cabal</a>°</li> <li><a href="/wiki/Stack_(Haskell)" title="Stack (Haskell)">Stack</a>°</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Windowing_system" title="Windowing system">Windowing systems</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Fudgets" title="Fudgets">Fudgets</a></li> <li><a href="/wiki/WxHaskell" title="WxHaskell">wxHaskell</a>°</li> <li><a href="/wiki/Xmonad" title="Xmonad">xmonad</a>°</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Web_framework" title="Web framework">Web frameworks</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Servant_(web_framework)" title="Servant (web framework)">Servant</a>°</li> <li><a href="/wiki/Snap_(web_framework)" title="Snap (web framework)">Snap</a>°</li> <li><a href="/wiki/Yesod_(web_framework)" title="Yesod (web framework)">Yesod</a>°</li></ul> </div></td></tr><tr><td colspan="2" class="navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Cardano_(blockchain_platform)" title="Cardano (blockchain platform)">Cardano</a>°</li> <li><a href="/wiki/Darcs" title="Darcs">Darcs</a>°</li> <li><a href="/wiki/Ganeti" title="Ganeti">Ganeti</a>°</li> <li><a href="/wiki/Git-annex" title="Git-annex">git-annex</a>°</li> <li><a href="/wiki/Haddock_(software)" title="Haddock (software)">Haddock</a>°</li> <li><a class="mw-selflink selflink">HaXml</a>°</li> <li><i><a href="/wiki/House_(operating_system)" title="House (operating system)">House</a></i>°</li> <li><a href="/wiki/Liquid_Haskell" title="Liquid Haskell">Liquid Haskell</a>°</li> <li><a href="/wiki/LOLITA" title="LOLITA">LOLITA</a></li> <li><a href="/wiki/Pandoc" title="Pandoc">Pandoc</a>°</li> <li><i><a href="/wiki/Paradox_(theorem_prover)" title="Paradox (theorem prover)">Paradox</a></i>°</li> <li><a href="/wiki/SQream_DB" title="SQream DB">SQream DB</a></li></ul> </div></td></tr></tbody></table><div></div></td><td class="noviewer navbox-image" rowspan="3" style="width:1px;padding:0 0 0 2px"><div><span typeof="mw:File"><a href="/wiki/File:Logo_of_the_Haskell_programming_language.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4d/Logo_of_the_Haskell_programming_language.svg/100px-Logo_of_the_Haskell_programming_language.svg.png" decoding="async" width="100" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4d/Logo_of_the_Haskell_programming_language.svg/150px-Logo_of_the_Haskell_programming_language.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4d/Logo_of_the_Haskell_programming_language.svg/200px-Logo_of_the_Haskell_programming_language.svg.png 2x" data-file-width="512" data-file-height="80" /></a></span></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Book</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Real_World_Haskell" title="Real World Haskell">Real World Haskell</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Community_of_practice" title="Community of practice">Community</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Eponym" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Eponym" title="Eponym">Eponym</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Haskell_Curry" title="Haskell Curry">Haskell Curry</a></li></ul> </div></td></tr></tbody></table><div> <ul><li><a href="/wiki/Arvind_(computer_scientist)" title="Arvind (computer scientist)">Arvind</a></li> <li><a href="/wiki/Lennart_Augustsson" title="Lennart Augustsson">Lennart Augustsson</a></li> <li><a href="/wiki/Richard_Bird_(computer_scientist)" title="Richard Bird (computer scientist)">Richard Bird</a></li> <li><a href="/wiki/Jeremy_Gibbons" title="Jeremy Gibbons">Jeremy Gibbons</a></li> <li><a href="/wiki/Andrew_D._Gordon" title="Andrew D. Gordon">Andrew D. Gordon</a></li> <li><a href="/wiki/Paul_Hudak" title="Paul Hudak">Paul Hudak</a></li> <li><a href="/wiki/John_Hughes_(computer_scientist)" title="John Hughes (computer scientist)">John Hughes</a></li> <li><a href="/wiki/John_Launchbury" title="John Launchbury">John Launchbury</a></li> <li><a href="/wiki/John_MacFarlane_(philosopher)" title="John MacFarlane (philosopher)">John MacFarlane</a></li> <li><a href="/wiki/Simon_Marlow" title="Simon Marlow">Simon Marlow</a></li> <li><a href="/wiki/Conor_McBride" title="Conor McBride">Conor McBride</a></li> <li><a href="/wiki/Erik_Meijer_(computer_scientist)" title="Erik Meijer (computer scientist)">Erik Meijer</a></li> <li><a href="/wiki/Simon_Peyton_Jones" title="Simon Peyton Jones">Simon Peyton Jones</a></li> <li><a href="/wiki/David_Roundy" title="David Roundy">David Roundy</a></li> <li><a href="/wiki/Joe_Stoy" title="Joe Stoy">Joe Stoy</a></li> <li><a href="/wiki/Audrey_Tang" title="Audrey Tang">Audrey Tang</a></li> <li><a href="/wiki/Simon_Thompson_(professor)" title="Simon Thompson (professor)">Simon Thompson</a></li> <li><a href="/wiki/Philip_Wadler" title="Philip Wadler">Philip Wadler</a></li></ul></div></td></tr><tr><td class="navbox-abovebelow" colspan="3"><div><i>Italics</i> <b>= discontinued</b> <li><b>° = <a href="/wiki/Open-source_software" title="Open-source software">Open-source software</a></b><br /><span class="noviewer" typeof="mw:File"><a href="/wiki/File:Symbol_book_class2.svg" class="mw-file-description" title="Wikipedia book"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/89/Symbol_book_class2.svg/16px-Symbol_book_class2.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/89/Symbol_book_class2.svg/23px-Symbol_book_class2.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/89/Symbol_book_class2.svg/31px-Symbol_book_class2.svg.png 2x" data-file-width="180" data-file-height="185" /></a></span> <b><a href="https://en.wikibooks.org/wiki/Haskell" class="extiw" title="wikibooks:Haskell">Book</a></b> <span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <b><a href="/wiki/Category:Haskell_programming_language_family" title="Category:Haskell programming language family">Category:Family</a></b> <span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <b><a href="/wiki/Category:Haskell_software" title="Category:Haskell software">Category:Software</a></b></li></div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1&useformat=desktop" alt="" width="1" height="1" style="border: none; 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