Emphasis on calculation model for guidelines

Stephen Green submitted a contribution for consideration:

https://lists.oasis-open.org/archives/ubl-comment/201403/msg00000.html

The minutes of the meeting of April 2, 2014 resolve this by committing to address these concerns with an emphasis on the importance of the calculation model in a UBL customization or implementation:

https://lists.oasis-open.org/archives/ubl/201403/msg00021.html