Validation - On-The-Fly loaded defaults might need validation #178
Description
E.g. the must-stmt validation might load additional data into the tree, by referencing fields that do not yet exist, but carry a default value.
These default values themselfes might carry constratints like leafrefs and must-stmts, which must be validated. (This might even end up in multiple rounds of loading defaults and performing of validation).
I'm somewhat thinking of marking Entries in the Tree as validated and re-running the validation until no new entries are being loaded...
Easiest might be to carry a list forward with all the newly inserted elements. Not sure yet if it makes sense.