[GeoNetwork-users] Changing fileIdentifier for ISO19139

Hi
ISO19119 has an optional attribute MD_Metadata/fileIdentifier that needs to be unique
ISO19139 has an optional XML attribute gmd:MD_Metadata@anonymised.com

How can I make gmd:MD_Metadata/gmd:fileIdentifier an editable field
(I wish to put the metadata pointOfTruth there as a URL [hence unique and useful])
and if needed
move the current uuid from the ISO19139 element gmd:MD_Metadata/gmd:fileIdentifier to the attribute gmd:MD_Metadata@anonymised.com

Cheers

e
Evert BLEYS
Data Manager
Australian Bureau of Agricultural and Resource Economics and Sciences
Dept of Agriculture, Fisheries and Forestry