Works for me. In the alternative, you should check for a double quote, not a < and +: 
s{creationid="[^"]*"}{creationid="Simon Simonsen"}g

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If you need to change the structure of XML file in a more complex way, you might need to switch to XML::LibXML::Reader, an XML pull-parser.

لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re: help with regular expression required by choroba
in thread help with regular expression required by PitifulProgrammer

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