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Top Forums Shell Programming and Scripting Extracting the value of an attribute tag from XML Post 302416213 by alister on Sunday 25th of April 2010 03:23:02 PM
Old 04-25-2010
Hello, JesterMania and welcome to the forums.

Assuming that all the relevant lines match the format of your sample data, if you have the value of the NAME attribute in a shell variable ($name in what follows), you can extract the value with the following AWK snippet:

Code:
$ name=Memory
$ awk -F\" -v n="$name" '/<ATTRIBUTE NAME="/ && $2==n {print $4}' data
512MB
$ name="CPU Speed"
$ awk -F\" -v n="$name" '/<ATTRIBUTE NAME="/ && $2==n {print $4}' data
3.0GHz
$ name="Video Card"
$ awk -F\" -v n="$name" '/<ATTRIBUTE NAME="/ && $2==n {print $4}' data
4870

Regards,
Alister
 

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XMLSTARLET(1)							 xmlstarlet Manual						     XMLSTARLET(1)

NAME
xmlstarlet - command line XML/XSLT toolkit SYNOPSIS
xmlstarlet [<options>] [<command>] [<cmd-options>] INTRODUCTION
XMLStarlet is a set of command line utilities (tools) which can be used to transform, query, validate, and edit XML documents and files us- ing simple set of shell commands in similar way it is done for plain text files using UNIX grep, sed, awk, diff, patch, join, etc commands. This set of command line utilities can be used by those who deal with many XML documents on UNIX shell command prompt as well as for auto- mated XML processing with shell scripts. OPTIONS
--version Display the version of xmlstarlet. --help Display help. COMMANDS
Type: xml <command> --help <ENTER> for command help Available commands include: ed (or edit) Edit/update XML document(s). sel (or select) Select data or query XML document(s) (XPATH, etc). tr (or transform) Transform XML documents(s) using XSLT. val (or validate) Validate XML document(s) (well-formed/DTD/XSD/RelaxNG). fo (or format) Format XML document(s). el (or elements) Display element structure of XML document. c14n (or canonic) XML canonicalization. ls (or list) List directory as XML. esc (or escape) Escape special XML characters. unesc (or unescape) Unescape special XML characters. pyx (or xmln) Convert XML into PYX format (based on ESIS - ISO 8879). p2x (or depyx) Convert PYX into XML. REFERENCES
XMLStarlet is a command line toolkit to query/edit/check/transform XML documents (for more information see http://xmlstar.source- forge.net/). AUTHOR
Mikhail Grushinskiy. XMLSTARLET(1)
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