>(2) The grammar will be a challenge as some commands can be abbreviated and some allow arbitrary order for other clauses/words
>eg use : order, again, excl etc
>

>use table exclusive again  in 0 alias X1 order x2
>use table order x2 alias X1 again in 0 excl
>

That was an issue with me in writing Visual FreePro, Jr., and I resolved to look for keywords, and then to the parameters to the right. It allowed them to be in effectively any order (though I do enforce some constraints to align with VFP's allowances).

It looks like a good project.