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HTML4 was reformulated as XHTML 1.0, SOAP messages were XML, and let us not forget XMLHttpRequest.","2013-10-08",[13,14,15,16],"data-formats","xml","xsl","xslt","/ckeefer/2013-2/img/xslt-processing.png",{"type":19,"children":20,"toc":1834},"root",[21,64,78,92,99,114,123,128,134,147,153,158,164,169,183,196,482,495,852,882,895,908,1702,1707,1713,1718,1723,1744,1750,1755,1769,1774,1779,1785,1790,1814,1828],{"type":22,"tag":23,"props":24,"children":25},"element","p",{},[26,29,38,40,47,49,62],{"type":27,"value":28},"text","Not terribly long ago, XML was the darling of the web. 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Your ajax request today is far more likely to receive a JSON return that can parsed into native objects than an XML document that has to be parsed like markup; HTML5 ",{"type":22,"tag":30,"props":70,"children":73},{"href":71,"rel":72},"http://www.ibm.com/developerworks/library/x-think45/#N100DE",[34],[74],{"type":27,"value":75},"parted ways with XML compliance",{"type":27,"value":77},"; REST replaced SOAP for most development (and while you can, of course, send and receive XML with REST, its certainly less common).",{"type":22,"tag":23,"props":79,"children":80},{},[81,83,90],{"type":27,"value":82},"XML's passing is hardly to be lamented - JSON really is the better choice in many instances. But out of XML's celebrity status, its human-readable/editable similarity to markup, and the need/desire to employ it in a wide variety of scenarios, came some interesting benefits that linger today - one of them being Extensible Stylesheet Language Transformations (XSLT). As promised ",{"type":22,"tag":30,"props":84,"children":87},{"href":85,"rel":86},"http://blog.artlogic.com/2013/08/29/client-side-fulltext-searching-with-fullproof/",[34],[88],{"type":27,"value":89},"previously",{"type":27,"value":91}," let's take a look at what XSLT is, and what it can offer us.",{"type":22,"tag":93,"props":94,"children":96},"h4",{"id":95},"so-what-is-xslt",[97],{"type":27,"value":98},"So what is XSLT?",{"type":22,"tag":23,"props":100,"children":101},{},[102,104,112],{"type":27,"value":103},"Per ",{"type":22,"tag":30,"props":105,"children":109},{"href":106,"rel":107,"title":108},"https://developer.mozilla.org/en-US/docs/XSLT",[34],"Mozilla Developer Network",[110],{"type":27,"value":111},"MDN",{"type":27,"value":113},":",{"type":22,"tag":115,"props":116,"children":117},"blockquote",{},[118],{"type":22,"tag":23,"props":119,"children":120},{},[121],{"type":27,"value":122},"[XSLT] is an XML-based language used, in conjunction with specialized processing software, for the transformation of XML documents. Although the process is referred to as \"transformation,\" the original document is not changed; rather, a new XML document is created based on the content of an existing document. Then, the new document may be serialized (output) by the processor in standard XML syntax or in another format, such as HTML or plain text.",{"type":22,"tag":23,"props":124,"children":125},{},[126],{"type":27,"value":127},"So, let's break this into a problem/solution formulation.",{"type":22,"tag":93,"props":129,"children":131},{"id":130},"problem",[132],{"type":27,"value":133},"Problem:",{"type":22,"tag":23,"props":135,"children":136},{},[137,139,145],{"type":27,"value":138},"You need an [client|user]-editable document in markup-like format (or just want to completely separate content from presentation details), that nonetheless will not be markup -- maybe you don't want to burden the client/user with needing to understand the structure of an html document, maybe it needs to contain (meta-)data that html doesn't easily accommodate, maybe the data contained therein needs to be transformed in various ways, or it needs to be transformed into multiple formats (i.e. not just HTML, but also PDF or Postscript, and you don't want to rely on tools like ",{"type":22,"tag":30,"props":140,"children":142},{"href":141},"code.google.com/p/wkhtmltopdf/",[143],{"type":27,"value":144},"wkhtmltopdf",{"type":27,"value":146},".)",{"type":22,"tag":93,"props":148,"children":150},{"id":149},"solution",[151],{"type":27,"value":152},"Solution:",{"type":22,"tag":23,"props":154,"children":155},{},[156],{"type":27,"value":157},"XML+XSLT. If it seems like you'd need a a fairly specific set of circumstances to ever need to delve into this tech, you'd be right -- XSLT isn't particularly common for just that reason. When the circumstances do crop up, however, it can prove the best tool for the job. There are some pitfalls to watch out for, though - especially if you're hoping to use the support baked into many modern browsers.",{"type":22,"tag":93,"props":159,"children":161},{"id":160},"examples",[162],{"type":27,"value":163},"Examples",{"type":22,"tag":23,"props":165,"children":166},{},[167],{"type":27,"value":168},"Some easily available references (listed below) can offer you a full picture of what XSLT (or at least, XSLT 1.0, which is the form baked into most modern browsers) looks like. Rather than reproduce that detail, let's take a look at what an XSL document might look like.",{"type":22,"tag":23,"props":170,"children":171},{},[172,174,181],{"type":27,"value":173},"The general structure of a well-formed XSLT document will be modular - you want to take advantage of ",{"type":22,"tag":175,"props":176,"children":178},"code",{"className":177},[],[179],{"type":27,"value":180},"xsl:template",{"type":27,"value":182},"s to seperate concerns, keeping your code well-organized and potentially reusable. 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Many well-designed, content-heavy sites will have similar search functionality to help users quickly navigate to whatever they're looking for; but generally, this relies on either a 3rd-party service (like Google), or else delegates the full-text searching to the backend (the database, or a specialized search server like ",{"type":22,"tag":30,"props":1872,"children":1875},{"href":1873,"rel":1874},"http://lucene.apache.org/solr/",[34],[1876],{"type":27,"value":1877},"SOLR",{"type":27,"value":1879},").",{"type":22,"tag":23,"props":1881,"children":1882},{},[1883],{"type":27,"value":1884},"This is usually the best way to go about this - but what if you have an application that's expected to provide this sort of search functionality when offline (either temporarily, or intended for always-offline)?",{"type":22,"tag":23,"props":1886,"children":1887},{},[1888,1890,1897,1899,1906],{"type":27,"value":1889},"It is here that ",{"type":22,"tag":30,"props":1891,"children":1894},{"href":1892,"rel":1893},"http://reyesr.github.io/fullproof/",[34],[1895],{"type":27,"value":1896},"Fullproof",{"type":27,"value":1898}," comes into its own. 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Neither of these would be good solutions under most circumstances - even a complicated regex (and they can get very complicated, very quickly) isn't going to offer you results for mild mispellings or near-matches, and will potentially make supporting unicode a nightmare; and sprinkling data-",{"type":27,"value":1920}," tags throughout your markup to indicate areas of interest is highly limited and clutters your markup.",{"type":22,"tag":23,"props":1922,"children":1923},{},[1924],{"type":27,"value":1925},"We needed a real search engine - one that can parse and normalize our text, and offer us scoring engines that can catch misspellings and near-matches. Consider the following example (from fullproof's home page):",{"type":22,"tag":23,"props":1927,"children":1928},{},[1929],{"type":22,"tag":1930,"props":1931,"children":1934},"img",{"alt":1932,"src":1933,"title":1932},"Software screen capture","assets/images/sc-mame.png",[],{"type":22,"tag":23,"props":1936,"children":1937},{},[1938],{"type":27,"value":1939},"Searching MAME Roms with match scoring - we get our results in a ranked order that can be controlled to a degree via what indexes we instantiate.",{"type":22,"tag":23,"props":1941,"children":1942},{},[1943,1945,1952,1954,1961,1962,1969],{"type":27,"value":1944},"The Fullproof github page includes a ",{"type":22,"tag":30,"props":1946,"children":1949},{"href":1947,"rel":1948},"http://reyesr.github.io/fullproof/tutorial.html",[34],[1950],{"type":27,"value":1951},"capable tutorial",{"type":27,"value":1953},", the contents of which we won't duplicate here - I suggest you go give it a look, along with the ",{"type":22,"tag":30,"props":1955,"children":1958},{"href":1956,"rel":1957},"https://github.com/reyesr/fullproof/wiki/_pages",[34],[1959],{"type":27,"value":1960},"supporting",{"type":27,"value":872},{"type":22,"tag":30,"props":1963,"children":1966},{"href":1964,"rel":1965},"http://reyesr.github.io/fullproof/jsdocs/index.html",[34],[1967],{"type":27,"value":1968},"documentation",{"type":27,"value":1970},". 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In our case, because we're pulling data from XML in the first place, we can restructure that content into JSON and slap it into our page as static data in a script element, to be pulled back out and fed to Fullproof when appropriate. 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This was the major stumbling block at first, particularly because we're opening a file on the local file system (which leads to all sort of security complications). 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Same story for indexedDB for Firefox and Chrome (Chrome will complain about same domain problems when loading our xsl as well, which is why we have to statically compile our html output of the XSLT transform for that browser - as noted, a topic for another post).",{"type":22,"tag":23,"props":2168,"children":2169},{},[2170],{"type":27,"value":2171},"Now, we can instantiate our indexes. The fullproof tutorial notes that any number of indexes are specifiable, and the search engine will fall back through them in the specified order when attempting to fulfill a search. 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