ECLASS Business Objects are called Structure Elements.
ECLASS uses globally unique identifiers for every Structure Element included in the ECLASS standard.
This globally unique identifiers are called IRDI (International Registration Data Identifier)
The International Registration Data Identifier is based on the international standards ISO/IEC 11179-6, ISO TS 29002-5 and ISO 6532.
Note:
The IRDI contains of
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0173-1 = ECLASS (as data supplier)
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Three letters followed by three numbers, e.g. AAA123
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Running number padded to length 3 with leading zeroes