NBT Crafting & Smelting

[TH3Doctor_11th]

Hi all, guys. This is THEDoctor. I'll be straight to the point 

I'm currently developing a mod, that includes items that, through NBTs, gets rot or saved with items. I've successfully implemented such thing, but there's a problem.. Following the logic behind the mod, you should be able to craft, for example, a saved item through a normal item(it is going to decay but it is not rot) and salt. And for furnaces, for example, only normal meat can be cooked, and not the one decayed. I know there are and there were other topics about such question, but no one of them  had an answer to solve it.. Pls, don't say things like "You can't do it" or "Change everything", beacuse it's very useless 

Thanks in advance

[TH3Doctor_11th]

I asked not to say such things lel I'm asking beacuse I know it's nearly impossible, but there will be a way.. There must be a way.. How could no one think about this possibility?

[TH3Doctor_11th]

Not asking about changin' it I fully understand, this was my last try.. You'll find it very strange, but i hate metadata. I don't know why, but I hate it. However, I have to use it.. Thanks for such a fast answer, man