Hi,
Thanks you for your valuable comments,let me try the Twig module.
On 12/8/15, Kent Fredric <kentfred...@gmail.com> wrote:
> On 8 December 2015 at 19:25, perl kamal <kamal.p...@gmail.com> wrote:
>> I am trying to parse the inner loop elements of the attached input xml
>> elements.
>> The below code doesn't retrieve the inner loop(<property>) elements if
>> the properties tag contains more than one item. Will you please point
>> the error and correct me.
>> Please find the attached input xml file. Thanks.
>
> A quick glance suggests you're getting bitten by one of the known
> problems of XML::Simple: That its completely inconsistent.
>
> 2 seemingly identally strucutred XML files can be decoded completely
> different to each other, so you need to have special cases everywhere
> in your code *just in case* that happens.
>
> Take for instance this simple code and its simple XML
>
> use strict;
> use warnings;
> use utf8;
>
> my $sample_a = <<"EOF";
> <group>
> <subgroup>
> <item name="bruce" />
> </subgroup>
> </group>
> EOF
>
> my $sample_b = <<"EOF";
> <group>
> <subgroup>
> <item name="mary" />
> <item name="sue" />
> </subgroup>
> </group>
> EOF
>
> use XML::Simple;
> use Data::Dump qw(pp);
> my $sample_a_dec = XMLin($sample_a);
> my $sample_b_dec = XMLin($sample_b);
>
> pp {
> a => $sample_a_dec,
> b => $sample_b_dec,
> };
>
> It looks simple, it looks like a and be have similar enough data
> structures, and you expect the pretty printed output to also be
> similar, right? Right?
>
> Nope!
>
> Here, XML::Simple went a bit special snowflake.
>
> {
> a => { subgroup => { item => { name => "bruce" } } },
> b => { subgroup => { item => { mary => {}, sue => {} } } },
> }
>
> At first glance you might overlook how these 2 entries are completely
> different.
>
> One is a hash mapping:
> "somevalue" => hash
> The other is a has mapping:
> "name" => some value
>
> either it should be:
>
> a => { subgroup => { item => { bruce => {} } } },
> b => { subgroup => { item => { mary => {}, sue => {} } } },
>
> or it should be
>
> a => { subgroup => { item => [{ name => "bruce" }] }},
> b => { subgroup => { item => [{ name => "mary" }, { name => "sue" }] } }
>
>
> But XML::Simple gave you the worst of both worlds.
>
> For this reason, XML::Simple is not recommended for real world work.
> XML::Twig may be more what you're looking for.
>
> Even its maintainer and author for 15 says "Hey, please don't use this" :)
>
> --
> Kent
>
> KENTNL - https://metacpan.org/author/KENTNL
>
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