DPHEP is "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 here.

As with the former study group of the same name, DPHEP reports to ICFA. 

See also:

• DPHEP tweets
• DPHEP-IB (Implementation Board) mailing list archive. 
• DPHEP-LEP-TF mailing list archive. 
• DPHEP wiki
• Data Analysis Preservation Task Force archive.