There 2 sides for this story:
1) Symantec Protection Suite Enterprise Edition does not include any DLP components.
2) Symantec Protection Suite Enterprise Edition for Endpoints (which is different from just SPS EE) does include DLP Standard. As I know this is the only DLP component in SPS editions and on the other hand SPS EE for Endpoints is the only SPS edition that has DLP on board. DLP Standard is an endpoint solution only.