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Provided with your PosiEd package are unmanaged automations on the Contact/Person account and the student record objects which use the PosiEd State settings, define how data will be transferred up or down the latterladder.
For example, if you wish to populate PosiEd using student contact data from EdVal, you would set the PosiEd State to Subscriber and then use the Publish Students LISS API call to populate the Student Record object with student data. The automations on the Student Record object will then create and/or update Contact records for each of these students.
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