AN INFERRED STRUCTURE. “While the measurement of expression genome-wide is only the first step in deriving system-level knowledge, it presents analytical challenges to this day. The main reason is that genomic experimental techniques measure individual parts of the system in parallel but cannot directly measure the system structure, which needs to be inferred.”
https://bmcsystbiol.biomedcentral.com/articles/10.1186/1752-0509-8-S2-S1