Gentle persons: I've been preoccupied with family life recently.I've done just a little tinkering on my google site. As I get more accustomed to APT statements, I realize my approach toward the syntactic forms of geometry descriptions has been a bit helter skelter. I want to be more systematic.
Toward this end, I've started a page on the APT Grammar and have included a file containing all the syntactic productions in the Brown et al. paper. It represents a major subset of APT 3 and will be my basis for building an APT360 grammar.
Regards, Kent