Service Design Package (ITIL)
The Service Design Package (SDP) contains the core documentation of a service and is attached to its entry in the ITIL Service Portfolio.
The SDP is described in the book Service Design, one of the five books that comprises the core of ITIL.
The SDP follows the lifecycle of a service from when it is first suggested as a possibility to when it is finally retired. It is the central reference point for all documentation of a service, so it contains many links to other documents.