PDS4

PDS4 is a format developed by NASA as the successor to PDS.

The fact that a "PDS4 Version 1.0" exists suggests that the "4" is supposed to be part of the format name, as opposed to a version number.

Specifications

 * PDS4 Standards Reference

Links

 * PDS4 main page
 * PDS4 Version 1.0 Functionality