The documentation for the PPAS is found in the file ppas8.txt.

The notes for PPAS 8 are found in ppas8notes.txt.
If there is a remark in the form "number)" for an object, it refers
to the ppas8notes file.

The notes for PPAS 11 are found in ppas11notes.txt.
If there is a remark in the form "note b" with a number, that note
refers to the ppas11notes file.