![]() value-of /xml/os/linux/distribution/name \ Narrow your focus by descending further into the DOM tree: $ xmlstarlet select -template \ I've removed some of the excess space in the sample output. The -nl stands for "new line," and it inserts copious amounts of whitespace to ensure your terminal prompt gets a new line after your results are in. The earlier in the Document Object Model (DOM) tree you start to explore, the more information you see: $ xmlstarlet select -template \ ![]() If you know the path to the node, specify the full path with the -value-of option. When looking for data in an XML file, your first task is to focus on the node you want to explore. You can view the data in XML with the xmlstarlet select ( sel for short) command. T or -text - output is text (default is XML) Q or -quiet - do not write anything to standard output. You can get further help by appending -help to the end of any of these subcommands: $ xmlstarlet sel -help Val (or validate) - Validate XML document(s) (well-formed/DTD/XSD/RelaxNG)Įl (or elements) - Display element structure of XML document Tr (or transform) - Transform XML document(s) using XSLT Sel (or select) - Select data or query XML document(s) (XPATH, etc) You can see what it has to offer by running the command along with the -help option: $ xmlstarlet -helpĮd (or edit) - Edit/Update XML document(s) For spontaneous XML interactions, I use xmlstarlet, a classic "Swiss Army knife"-style application that does the most common XML tasks. Sometimes you don't need to process XML data, though you just need a convenient way to extract important data from, update, or just validate it. There are many tools designed to help parse and transform XML data, including software libraries that let you write your own parser and complex commands like fop and xsltproc. Should all else fail, you can install it manually from the source code on Sourceforge. Free online course: RHEL Technical Overview.XMLStarlet syntax tip: xmlstarlet sel -t -n use template options containing XPATH.You might use XPath to select XML file element here.Īs your question seems as a kind of homework to me, I just give you: ![]() s or -sort op xpath - sort in order (used after -m) where else - check if previous conditions failed elif - check condition if previous conditions failed var = - declare a variable (referenced by $name) f or -inp-name - print input file name (or URL) v or -value-of - print value of XPATH expression c or -copy-of - print copy of XPATH expression net - allow fetch DTDs or entities over network N = - predefine namespaces (name without 'xmlns:') E or -encode - output in the given encoding (utf-8, unicode.) B or -noblanks - remove insignificant spaces from XML tree ![]() D or -xml-decl - do not omit xml declaration line template for querying XML document with following syntax: input XML document file name/uri (stdin is used if missing) Sel (or select) - Select data or query XML document(s) (XPATH, etc)Īnd after xmlstarlet sel -help: XMLStarlet Toolkit: Select from XML document(s) I assume this brackets this particular object (the ipAddress value, 123 Westbrook), but what part of the path is actually given to XMLStarlet? What is the significance of these extra fields like es?Įs means that ipAddress comes form FRED.99.88.xsd XML Schema - look at xmlns:es="FRED.99.88.xsd" namespace definition (one of bulkCmConfigDataFile root tag attributes). The original file is very large, so here's the first part of the XML (many of the closing tags are missing by posting only part of it): 1 Which should point to the value 123_Westbrook? Insert slashes? Something else? What is the significance of these extra fields like es? I assume this brackets this particular object (the ipAddress value, 123 Westbrook), but what part of the path is actually given to XMLStarlet? The brackets? The parameter name? Separated by slashes? I have a file like the following and I wanted to get, say, the following address: 123_Westbrook Knowing little about XML, I'm overwhelmed with the tool, and likely need only a very tiny part of it. I need to extract a few values from an XML file, and I stumbled onto XMLStarlet that seems pretty powerful.
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