Add parent class power capacity

[l-emele]

Description of the issue

From today's OEKG meeting:

Create a parent class (e.g. power capacity) for the capacity classes

Ideas of solution

If you already have ideas for the solution describe them here

Workflow checklist

• I discussed the issue with someone else than me before working on a solution
• I already read the latest version of the workflow for this repository
• The goal of this ontology is clear to me

I am aware that

• every entry in the ontology should have a definition
• classes should arise from concepts rather than from words

[stap-m]

Currently, the parent class is power value with a very broad def: A power value is a quantity value that has a power unit as unit. According to this def, a flow potential would also be a subclass. Thus, it makes sense to find a more specific parent class power capacity.

[stap-m]

Both potential and capacity are kinds of maximum values... I just had the idea of creating a common parent class? A maximum value is the upper limit of an artificial object or process to contain, transform, ... something ?
We could add capacity and potential as alternative terms.

power capacity could still be a subclass: power capacity is a maximum value of a generator or power generating unit to generate power.

[l-emele]

Hm, I am ambiguous whether I like this idea or not. In your idea, the existing classes declared net capacity, block size and nameplate capacity then aren't any longer subclasses of power value (A power value is a quantity value that has a power unit as unit.)

However, we might solve this by making 'power value' 'equivalent to' 'quantity value' and ('has some power value'). If we do so, we probably should also for consistency make the other basic dimension values (length value, energy amount value etc.) equivalent classes.

[l-emele]

Currently, the parent class is power value with a very broad def: A power value is a quantity value that has a power unit as unit. According to this def, a flow potential would also be a subclass. Thus, it makes sense to find a more specific parent class power capacity.

I didn't see that comment, when I was writing my last comment. flow potential can have a power unit as unit, but not necessarily. It can also be e.g. W/m² in the case of a solar potential or m³/s in case of some fluid flow.

[jannahastings]

@l-emele , @stap-m We have a new team member @stage1407 , would it be possible for him to work on the implementation of this issue under your guidance?

[stap-m]

I was just wondering, what parent class makes most sense for our use cases. power value is of course not wrong, but is it a useful classification?

flow potential can have a power unit as unit, but not necessarily.

The case above is a good example, that another classification might be useful.
I think a parent class maximum value( or even broader: threshold ?) is a reasonable grouping because it's independent from the unit. We could have power value as an equivalent class.
But if we have good reasons why power value should stay parent class, I'm also open to it.

[l-emele]

We could have power value as an equivalent class.

Not every power value is a maximum value. But probably you mean something like power capacity EquivalentTo maximum value and power value or power capacity EquivalentTo maximum value and (has unit some power unit). Right?

[stap-m]

Not every power value is a maximum value.

Of course not. Sorry for not being specific enough. I meant something like
'power value' 'equivalent to' some ('quantity value' and 'has unit' some 'power unit')

[l-emele]

Ok, I see and agree to this proposal. The same principle holds probably true for other basic quantity value subclasses like length value which could also be defined as 'length value' 'equivalent to' some ('quantity value' and 'has unit' some 'length unit'). But I am fine with making only those classes equivalent classes where necessary, like power value in this case.

[stap-m]

So what about my maximum valueidea? A maximum value is the upper limit of an artificial object or process to contain or transform another entity.

[l-emele]

Small extension: A maximum value is a quantity value that represents the upper limit of an artificial object or process to contain or transform another entity.

[stap-m]

• Power capacity is a maximum value of a generator or power generating unit to generate power. ?
• make potential a subclass of maximum value as well?! Add parent class potential #1093 / add potential as parent class #1093  #1102

[l-emele]

So I think, we have an agreement on:

• A maximum value is a quantity value that represents the upper limit of an artificial object or process to contain or transform another entity.
• A power capacity is a maximum value of a generator or power generating unit to generate power.
• Make the declared net capacity, nameplate capacity and power rating subclasses of power capacity.
• Make potential a subclass of maximum value: A potential is a maximum value that describes some upper limit in a spatial region of reference.
• Make power value an equivalent class: 'power value' 'equivalent to' some ('quantity value' and 'has unit' some 'power unit')

I'll implement.