yii and toxi tags in a form


I am trying to figure out how to add tags to a object using the toxi schema, dose anyone have any idea how i can add them to the main item form, kind of like the blog demo, but that stores them in an array where as the toxi system is a 3 table system (item --< itemtags >-- tags).

I have all the relationships in place and can get the array of tags, but where do i add the validation rule?

I would also like in the blog system a auto complete (as a kind of validation), but should be able to pull apart the blog version.

many thanks


any pointers, keywords for google would be help full :)