How I can create a category for only aircraft carrier

[vongratz]

How I can create a category for only aircraft carrier buids sometype of new planes?
Is it necessary tocreate a call in some Lua archive?
Ive tried to create a category: NAVYPLANE and put it the plane category and, without any sucess.Ive put in the carrier also NAVYPLANE in the buildable category, but nothing happened.What I forgot?Otherwise weird things happened.
A note!Ive utilized as base for modifs, a file mod_units.bp.

[The Mak]

Show us your full Categories for your plane and air craft carrier. Also show us the full BuildableCategory for the aircraft carrier.

[FunkOff]

You create a category by pulling a name out of your ass and assigning that to a unit's list of categories: "UNITCATEGORYFROMMYBUTTOX" is a completely valid category. If you list 'UNITCATEGORYFROMMYBUTTOX' in the categories list of a unit in their blueprint file, then congrats, that unit is officially in the UNITCATEGORYFROMMYBUTTOX category, and can be determined as such. EntityCategoryContains(unit,categories.UNITCATEGORYFROMMYBUTTOX) will return true for that unit.

[vongratz]

Many Thanks for the answers, I will try to do the suggestion , not exactly with this name ...I will publish also all category.
Another trouble is to avoid that these navy planes would be built be air factories, that is the core of the question.

[Veta]

remove tech3 air factory from the plane's categories?

[vongratz]

OG MY GOD my english isnt good enough to translate the idea...but lets try again.

1 - Carriers only will produce some planes
example of CYBRAN
She (the carrier) will produce only
T2 fighter-bomber Corsair (original from SCFA)
T2 torpedo-bomber Cormorant (original from SCFA)
T1 heavy interceptor (To be built only by carrier, NOT by any air factory)
T3 Fighter-bomber (To be built only by carrier, NOT by any air factory)
T3 Stealth-bomber (To be built only by carrier, NOT by any air factory)
Unfortunatelly I think we dont have any "exclusio"n category like DONTBUILT" UNITFROMYOURBUTT"
What I can do?

[FunkOff]

lol this is so easy: Give every carrier plane the category BUILTBYCARRIER. Then allow carriers to make BUILTYBYCARRIER + CYBRAN categories.

[vongratz]

Yes, but the second part, the categories that allow the planes to be built also by air factories?

[FunkOff]

Yes, but the second part, the categories that allow the planes to be built also by air factories?

Right now, air factories can build units that mean two categories: "FACTION" - "AIR". Make them FACTION + AIR - CARRIERONLY and they will not be able to make any units that are CARRIERONLY category.

[vongratz]

Thanks, I will try it.