Question about the entity CommodityClassification

Hello,

I'm a little bit surprised to see that an item may have several 
commodity classifications while I don't see any attribute in the entity 
CommodityClassification to inform about the agency responsible for a 
particular commodity classification. So how do we differentiate between 
the possible several commodity classifications in an item?

Also, the documentation on UBL-2.0 (Section 4.1.1 Items) states that 
item may have multiple classifications. Are we talking about the 
commodity classification or another entity?

Thank you,
Eric Desgranges
Tela-Group http://tela-goup.com