Meaning and use of the diferent option in Model menu

Hi, I’m Trying to define a model for my house, and I see that there several option that seem repetitive. So I wan’t to ask here if I undertand correctly. The posible option are:
Name (this is for internal use)
Label ( for a more beautiful name)
Category (for the icon)
Semantic class ( for telling opwnhab what is this item)
I understan this correctly?
Does Category have another uso beyond the Icon?
Is there a conplet list of Catregories?

Also, is there any description for the semantic class options? Most are obvious, but some I’m not sure, for example Entry, It’s some kind of door or the room reciber?

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