Sorry to be a pest Jenda, but I'm trying to modify this script for my own use but I've only just started learning perl so much of this is completely new to me. Could you explain what each bit does if it's not too much trouble? Or explain how I could modify it to sort an XML file such as this based on category, subcategory and then code1? Sorry to ask so much but I really am at a loss. 
<?xml version="1.0"?>
<ResultDetail>
<results>
    <ResultItem>
        <category>AGM</category>
        <subCategory>VAL</subCategory>
        <code1>010000</code1>
        <name>parse</name>
        <type>ERR</type>
        <flags>320</flags>
        <language>EN</language>
        <description>Parse error</description>
        <cause>Parse error in the input XML</cause>
        <action>Correct the error and send your request again</action>
    </ResultItem>
    <ResultItem>
        <category>AGM</category>
        <subCategory>VAL</subCategory>
        <code1>010300</code1>
        <name>client.NotEntered</name>
        <type>ERR</type>
        <flags>320</flags>
        <language>EN</language>
        <description>Client not entered</description>
        <cause>Invalid data field values</cause>
        <action>Correct the problem and send the request again</action
+>
    </ResultItem>
    <ResultItem>
        <category>AGM</category>
        <subCategory>VAL</subCategory>
        <code1>010400</code1>
        <name>client.notFound</name>
        <type>ERR</type>
        <flags>320</flags>
        <language>EN</language>
        <description>Client not found</description>
        <cause>Invalid data field values</cause>
        <action>Correct the problem and send the request again</action
+>
    </ResultItem>
    <ResultItem>
        <category>AGM</category>
        <subCategory>VAL</subCategory>
        <code1>010500</code1>
        <name>client.invalidData</name>
        <type>ERR</type>
        <flags>320</flags>
        <language>EN</language>
        <description>Client data invalid</description>
        <cause>Invalid data field values</cause>
        <action>Correct the problem and send the request again</action
+>
    </ResultItem>
</results>
</ResultDetail>

[download]
Note: It's actually a much much larger file (9510 lines)

In reply to Re^2: Sort xml based on attribute by Anonymous Monk
in thread Sort xml based on attribute by bharathinc

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