Oh I see, it's a file. A physical, real, actual, file. How odd.
Anyway, yes, that will work... -ish.
Inconvenient, but possible at least.
On a sidenote, wouldn't be a good idea to improve the file format "a little"? Make it a nice JSON format? Especially the "CONSTRAINTS" field is... still cryptic.
It would help if there's some discrete documentation on this file.