## AceDB constraints.wrm syntax

A constraint given on a class will be checked before saving an object while parsing an ace file if an object does not satisfy the constraint, you will get a parse error

### Example

    Class Paper
    Constraints "Year:1"

This will imply that you cannot edit a paper that does not have a Year value, i.e. field 1 right of Year must be non void

any acedb query `LOCAL` to a single object is valid don t use: `FIND` or `FOLLOW` constructions