Edit archetypes2(the previous has errors)

Hello, I have two problemas. The first is that I don't know the 'Tittle' and
'Id' when I go to create a item (the idea is set this values from a script) on
the edit form. My second problem is that I don't know to do that a item
attribute (that previous I have created it) is a primary key (I want say: "Plone
can't be two items with the same field value").And how can do to have two field
primary key????

Sorry for my English!!!!



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