Title: RE: [ubl-lcsc] Newest version of the OO-design position paper. Hello Joe, I do not know, why we need this high-level containers like Header, Summary, Party etc. . This is a separation for humans, because all layouts of the hard copies of business documents are divided in this strucute. But all (and really all) XML instances will be processed by applications and tools only. Only the designers, developers and support peoples are reading less XML instances partially. Therefore, we have to think about which kind of containers and groups are necessary and efficient for applications (not for humans). Kind regards, Gunther