BTW you must put a -> between the Layer2Detail and the Device

Actually, the arrow is optional in that position. You need the first one, since without it, Perl would interpret $ref{Layer2Details} to mean the value associated with the 'Layer2Details' key in %ref, rather than the value associated with the 'Layer2Details' key in hash referred to by $ref.

All this and more is explained in Mark's very short tutorial about references which is part of your Perl distribution.

In reply to Re^4: Extracting tagged data from a XML file by grantm
in thread Extracting tagged data from a XML file by theroninwins

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