Without specification,
software is incomplete.
The hardest part of the software task is arriving at a complete and consistent
specification, and much of the essence of building a program is in fact the
debugging of the specification.
— Fred Brooks
PIE Drafts
PIE Drafts are working copies of PIE Standards. Their naming scheme differs to allow "branching & merging" of the specification work.
All versions of our specifications are published here, including expired documents. The latest version number is the current version.