In 1996, EPRI and Electrotek placed PQDIF in the public domain to facilitate the interchange of power quality data between interested parties. EPRI and Electrotek have also offered the format, sample source code, and documentation to the IEEE 1159.3 task force as a possible initial format to meet that groups requirements.
Complete background information, documentation, and sample source code for PQDIF can be found at the following URL: http://www.pqnet.electrotek.com/pqnet/main/measure/pqdif/pqdif.htm.
Since the materials available are quite extensive, instructions exist on this site to obtain a free CD-ROM containing all of the documentation, examples, and additional utility programs not found on the WWW site.
PQDIF is also being used as one of the standard formats for arbitrary waveform, spectrum, and power quality data in the Utility Communication Architecture (UCA) Generic Object Models for Substation and Feeder Equipment (GOMSFE). UCA is a 10+ year old EPRI initiative that was placed into the public domain several years ago and is now in the process of being turned over to the IEEE and published as an IEEE technical report. This work is being coordinated via IEEE Standards Coordinating Committee 36 chaired by Joe Koepfinger. Its permanent home will be in the IEC Technical Committee 57, working groups 10, 11 and 12 where it will be harmonized with related work. This harmonization has been underway for some time now. A new WWW site is available for more information on UCA: http://www.ucaforum.org/.