1. A non-transitory computer readable medium including program code for providing a message-based interface for exchanging goods tag-related information for an electronic device or other small piece, part or label that is attached to a product or package and that contains selected information about the product or package, the medium comprising: program code for receiving via a message-based interface derived from a common business object model, where the common business object model includes business objects having relationships that enable derivation of message-based interfaces and message packages, the message-based interface exposing at least one service as defined in a service registry and from a heterogeneous application executing in an environment of computer systems providing message-based services, a first message for providing a notification to print or create a mixed content package tag notification, wherein the mixed content package tag comprises a label for an identified logistics unit, the label including package measurements and package content information, the first message including a first message package derived from the common business object model and hierarchically organized in memory as: a form mixed content package tag notification message entity; and a goods tag package comprising a goods tag entity, a delivery package, a business transaction document references package and a site package, where the goods tag entity includes an identifier (ID), a creation context depending date, an output request creation date time and an output request creation identity ID, where the delivery package includes a delivery entity, where the business transaction document references package includes a business transaction document references entity, where the site package includes a site entity, and further where the site entity includes a site ID and a site description; program code for processing the first message according to the hierarchical organization of the first message package, where processing the first message includes unpacking the first message package based on the common business object model; and program code for sending a second message to the heterogeneous application responsive to the first message, where the second message includes a second message package derived from the common business object model to provide consistent semantics with the first message package.