Summary and Outlook This document (Part 5 of the document series "Specification of the Asset Administration Shell") defines the AASX package file format for file exchange of Administration Shells based on the Open Package Conventions. Additional parts of the document series cover (see [10]): the information meta model of the Asset Administration Shell (Part 1, [9]), interfaces and APIs for accessing the information of Asset Administration Shells (access, modify, query, and execute information and active functionality; Part 2, [10]), data specification templates (Part 3 series), security aspects of the Asset Administration Shell (Part 4)