From TM-XML-Wiki

Key identifying a trade mark

TradeMarkKey (Element)
Type:	KeyType
Cardinality:	1..n
Defined in:	BasicRecordType MarkRecordRelationType RecordChangeNameAddressType RecordLicenceType RecordNationalInternationalReplacementType RecordOppositionPeriodType RecordTransferType

Translation

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it - Italian

Implementation-Specific