Reading XML: Introducing XPath
Reading XML: Introducing XPath
Andrew Walker
Why?
? Makes writing analysis scripts for your XML encoded results easy.
? Is used by many other XML technologies. XSLT, XPointer etc.
? A Fortran XPath API is in development. ? It helps you design your XML documents.
#! /usr/bin/perl -w $num = `[+-]?\d+\.?\d*'; while () {
if (/temperature = ($num)/) { $temp = $1;
} elsif (/pressure = ($num)/) { $pres = $1;
} } ...
#! /usr/bin/perl -w
use XML::XPath;
my $xp = XML::XPath ->new(filename => $ARGV[0]);
$temp = $xp -> find("//temperature");
$pres = $xp -> find("//pressure");
...
/XPath/queries/are/like/paths
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