Class hierarchy - MobilePhone

Dear schema.org community,

could you please answer me question concerning creating SubClass in
schema.org, specifically http://schema.org/Product. I would like to create
an entity MobilePhone which is a subtype of Product.

Do I need to specify link/subclass in my RDF database? Or is it sufficient
to keep the Product attributes in my MobilePhone entity? So the hierarchy
would be specified only by the same attributes?


I created a html file describing MobilePhone (attachment). Is this enough
to enforce the hierarchy? I will have it at localhost/MobilePhone for my
own usage.

Thank you for your help,

Filip