DPHEP stands for "Data Preservation in HEP" and is an International Collaboration of Institutes, Experiments, Funding agencies and other interested parties to implement the recommendations of the DPHEP study group. These are detailed in the Blueprint document available on the DPHEP website.
As with the former study group of the same name, DPHEP reports to ICFA.
DPHEP-IB (Implementation Board) mailing list archive.
DPHEP-LEP-TF mailing list archive.