Some modeling approaches and patterns (e.g., xCBL) focus on the structure and content of the "document payload" – this "bottom up" approach emphasizes the requirement of "information interoperability"
Other modeling approaches and patterns (e.g., RosettaNet) work "from the top" down, starting with business models and processes and getting to the "document payloads" only at the end – this emphasizes "commercial interoperability"
We need to achieve both kinds of interoperability – the former is a necessary but insufficient for the latter, so we need to develop business process and business information models concurrently
This is represented in the Reuse Matrix as "meeting in the middle"
