When you start typing an item in a Pointer, if you pause Wagn will do its best to fill in the rest by listing the names of existing cards that begin with whatever you typed in (much like it does in the Search bar).
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 {{+participants}} on Session+*tform 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: {{+performers|type:User}}. This will take precedence over participants+*options if both are present, and specify different types.
