Order of operations for transform and custom keywords

[carlo-quinonez]

I understand that standard keywords, such as format will be run before any custom keywords, such as transform. So if we want to transform a string BEFORE validating its format, we have to use $allOf to force the order.

In my case, we're considering using transform to turn a proprietary version number format into something close to a semver, then using the semver keyword from the ajv-semver to validate and clean up the coercion.

What would determine the order?

• The order the keywords are added to ajv
• The order the keywords appear in the JSONSchema

Can we count on the order?

[carlo-quinonez]

@epoberezkin are custom keywords processed in a deterministic order?

[carlo-quinonez]

@epoberezkin any thoughts?