Autofill and default cardtypes in Pointers

If the Pointer is in a form, you can restrict Wagn to guessing from a subset of cards. For example, in a Session cardtype on a Wagn for a conference, you include on Session+*type+*content so that each Session card will ask for a list of participants. If you create "participants+*options" as a search for User cards — {"type": "User"} — then items in "Making Wikis Welcome+participants" will autofill with Users' names.
Let's suppose you type in Frank Zappa, who doesn't have a User card yet on that Wagn. After you save, when you click on the gray "ADD FRANK ZAPPA", the card's type will automatically be set to User. Wagn knows to do this because the search specified the User type. You can alternately specify this when including the Pointer in the form, with: