Modelling Engines

[chcorbato]

For D2.2

Do we need to distinguish consumed resources from blocked resources?

[chcorbato]

@alex-quin-gabriel can you explain the property Output representation class?

Engines define how their inputs relate to their output in terms of processing semantics.

[alex-quin-gabriel]

I think so.
let's look at a battery as an example.

your battery has a capacity of 10 Ah, and can supply 5V at a maximum of 0.5 A.

now, when you use some tool for an hour and that tool needs some current, say 500mA, you cannot run another tool concurrently, but there will be a lot of charge left.

the remaining charge of the battery (what remains after you consumed some energy 0.5 Ah), and the maximum concurrent power draw (1A) it can deliver, are separate concepts.

same applies to many things, mobile bandwidth for example.

[alex-quin-gabriel]

Output representation class, is the representational class of the output modelet. (or rather its relation to its parents)
so the class of the input-output modelet relation in the processing/representational model (feel free to suggest a better name).

I'll try to explain using an example.

you have a wind modelet.
it models wind. wind is the modelled phenomenon's class in the world model.
it is formally, an array of floating point numbers, that's its formalism,

there are however many arrays of floating point numbers, and not all of them represent a distribution using samples.

and there might be other formalisms to represent distributions using samples, e.g. an array of integers or strings.

so we want a class that represents the modelling/representational semantics.

basically, not every number is an average/minimum/maximum. so we say this:

• this output modelet has these parent modelets
• their relation is classified using this representational class.

or concretely:

• this number is related to this set of numbers, and that relation is of type 'maximum'

[alex-quin-gabriel]

I welcome improvements here, it's a first draft.