Abstract: Product Data Management systems, methods, and mediums. A method includes receiving a lock request for data of a specified type. The method includes processing the lock request in response to the lock request, including locking the data of the specified type for a plurality of data objects in response to the lock request. The method includes receiving at least one change to data of the specified type for at least one of the plurality of data objects, The method includes updating and saving the at least one of the plurality of objects according to the received change by changing the data of the specified type.

Abstract: Product Data Management systems, methods, and mediums. A method includes receiving a first schedule. The first schedule includes at least a first task. The method includes creating a proxy task in a second schedule. The proxy task corresponds to and is a substantial copy of the first task. The method can include creation of a dependency between the proxy task in second schedule and another task in the second schedule. The method includes storing the second schedule.

Abstract: Product data management systems, methods, and mediums. A method includes receiving a request to create an object. The method includes determining that the system is in a conditional mode. The method includes creating an orphan object in response to the request and in response to determining that the system is in the conditional mode. The orphan object corresponds to a hierarchy but is not included in the hierarchy. The conditional mode is one of a deferred session or an exploratory session.