in reply to Re^2: Update nodes in XML document
in thread Update nodes in XML document

> the XML will be loaded from STDIN. I am sorry, but I don't have strong perl skills :(

Perl skills are irrelevant here. You just need to read the documentation.

my $dom = 'XML::LibXML'->load_xml(IO => *STDIN);

[download]

> update only the alt-title with origin="tilte"

Again, not a Perl skills question. findnodes uses XPath Expressions, so just modify it: 

my ($other_title) = $dom->findnodes('//file/body/group/unit/alt-title/
+otherTitle[@origin="tilte"]');

[download]
Is it "tilte" or "title"?

> the new values will be taken from another file which will contain the same number of lines as the nodes.

Do you know how to read lines from a file? See open and the diamond operator in perlop. For example, I created an input file called 1 with the following contents: 

a
b
c

[download]

Then, I created a simple XML file called 1.xml: 

<root>
  <one>
    <two origin="a"/>
    <two origin="b"/>
  </one>
  <one>
    <two origin="b"/>
    <two origin="a"/>
  </one>
  <one>
    <two origin="a">old</two>
    <two origin="b">old</two>
  </one>
</root>

[download]

Finally, here's the script that replaces the text in two with origin="a" by the values read from the given file. $. is a special variable that contains the input's line number, you can use it to index the nodes in the XPath Expression: 

#!/usr/bin/perl
use warnings;
use strict;

use XML::LibXML;


my $new_values_file = shift;

my $dom = 'XML::LibXML'->load_xml(IO => *STDIN);

open my $in, '<', $new_values_file or die "$new_values_file: $!";
while (<$in>) {
    chomp;
    my ($two) = $dom->findnodes("/root/one[$.]/two[\@origin='a']");
    $two->removeChildNodes if $two->findnodes('text()');
    $two->appendText($_);
}
print $dom;

[download]

Run as 

perl script.pl 1 < 1.xml

[download]

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,

[download]

Replies are listed 'Best First'.
Re^4: Update nodes in XML document
by corfuitl (Sexton) on Mar 27, 2018 at 13:57 UTC

    Thank you for your reply.

    I adapted my code according to your code and it works. However, I have another issue. It doesn't work with all XML files I have. the difference is that the one files has

    <xliff version="1.1" xml:lang='en'>

    and it works, while the other one has

    <xliff xmlns:m="http://www.xxx.com/mxml/2.0" xmlns="urn:xx:names:tc:xml:document:1.2" version="1.2" m:version="2.3" m:level="1">

    and it doesn't work.

    Moreover, the second file has the structure below.

    Here is my code

    #!/usr/bin/perl

use 5.010;
use strict;
use warnings;

use XML::LibXML;

my $new_values_file = shift;
open my $in, '<', $new_values_file or die "$new_values_file: $!";
chomp(my @new_values = <$in>);

my $dom = 'XML::LibXML'->load_xml(IO => *STDIN);

my $i = 0;
foreach my $alt_trans ($dom->findnodes('//file/body/group/unit/alt-tit
+le/otherTitle[@origin="title"]')) {
    print $alt_trans->to_literal();
    $alt_trans->removeChildNodes if $alt_trans->findnodes('text()');
    $alt_trans->appendText($new_values[$i]);
    $i++;
}

    [download]

    And one more question. Why in this file it doesn't work? Because there are blocks of <group> elements? Is my Xpath correct with this structure?

    ...
<group>
 <unit id="3Ojs1SLwMmEHK8mJ0_dc2:43”>
  <titleEN>{3&gt;19&lt;3}</ titleEN >
  <titleFR>{3&gt;19&lt;3}</ titleFR >
  <alt-title origin="tilte"><otherTitle/></ alt-title>
  <alt-title origin="price"><otherPrice/></ alt-title>
 </unit>
</group>
<group>
 <unit id="3Ojs1SLwMmEHK8mJ0_dc2:43”>
  <titleEN>{3&gt;19&lt;3}</ titleEN >
  <titleFR>{3&gt;19&lt;3}</ titleFR >
  <alt-title origin="tilte"><otherTitle/></ alt-title>
  <alt-title origin="price"><otherPrice/></ alt-title>
 </unit>
</group>
...

    [download]
[reply]
[d/l]
[select]
      xmlns="urn:xx:names:tc:xml:document:1.2"

      [download]

      This defines a default namespace. You need to register it and use it in all the XPath expressions. See Re: XML::LibXML & namespaces for details.

      ($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,

      [download]
[reply]
[d/l]
[select]

In Section Seekers of Perl Wisdom