I have XML in human readable format, eg: 

<outermost>
    <innermost>
        <first>1</first>
        <second/>
        <third>These spaces are to be preserved.</third>
    </innermost>
</outermost>

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...which I would like to compact to something similar to the following: 
<outermost><innermost><first>1</first><second/>
<third>These spaces are to be preserved.</third>
</innermost></outermost>

[download]
Only whitespace occuring within values needs to be preserved. Any whitespace which only separates tags from other tags can be removed.

I naively came up with the following regular expressions which takes care of most possibilities: 

# <begin> <begin>
$xml =~ s!(<\S+?>)\s+><\S+?>!$1$2!g;

# </end> <begin>
$xml =~ s!(</\S+?>)\s+><\S+?>!$1$2!g;

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...but while I could easily see that there are more possibilities to consider (and these are not completely robust either...), I doubt I am the first to run into this problem.

Is there a CPAN module or canned solution which deals with compacting XML?

Thanks.

In reply to compacting XML? by Anonymous Monk

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