Software control distribution The application enables the Release Management team to control the distribution of software by creating a Definitive Media Library (DML) stored in the CMDB. The DML consists of a physical store and a logical store. The physical store holds master copies of all software media. This tends to be software that has been provided from an external source. The logical store is the index of all software and releases, versions, and so on, highlighting where the physical media can be located. The logical store may also be used to store software that is developed within the organization. Both physically and logically stored software are represented as records on the DML table.