Hi i have a some doubt defining my relations into mapping files. My relations are:

Article (id,name)
|__ ArticleStock (inherit from Article, id_stock, series (List), stocks (List), lotes (List), ubications (List))

In some situations my app need only Article data, in other ArticleStock withs only STOCKS collection, and in others ArticleStock with SERIES collection.

How can i express this into HIbernate Mappings ?.

Thanks
Danny

Hibernate does not lead you to a special modelization. Just do as you would do without hibernate and map your classes after that.
If you just care about performances, hibernate lazy loading will help you just loading the objects you want.