Discussing about Performance instructions and cookbooks with colleagues from IRCAM.
Max’ Jacob comment “I think that the score is something that has a strong similarity with a cooking recipe, in the sense that both contain information about how to produce a result defined as being a particular instance of a more general concept. I could not find any reasonable way to express this in CRM, that's why i had to create an extension(PX1)linking an E29 Design or Procedure(the score)to an E55 Type(the generic concept). Maybe there is a better way to say in CRM that a recipe tells how to cook Gulasch, but whatever this way is, i would expect the relation between the performance instructions and the work to be modelled similarly.It seems to me that this does not happen in FRBRoo, or am i missing something?”
December 2006

Talking about Performance Plan, Performance, Performance Work and Activity, it is remarked that a relationship “shows how to realise” a plan is missing from the CRM and it could be useful. Martin argued that an activity is only influenced by the plan it was supposed to follow: there are all degrees of deviations from that plan. We can therefore not just say: "This follows the plan" or "This does not follow the plan." A plan can show future features of the intended thing to be produced, or just tell how to produce it. In documentary practice, we may have evidence of the plan, and/or outcomes that claim or seem to follow the plan. We can perceive and classify such outcomes. Martin sees a certain similarity between communicating signs in a performance, and writing.

Paris 14/3/2007