201909 false flag keywords "additonalItems", "then"

[pgalbraith]

No description provided.

[stevehu]

@pgalbraith Thanks a lot for your help. It makes perfect sense to add then to the list as we only check the if keyword in our implementation. However, I think we should implement additionalItems if possible. What do you think? Compare with items, it is not popular. But if it is present in your schema, I think we need to respect the validation rule defined here.

https://json-schema.org/draft/2019-09/json-schema-core.html#additionalItems

[pgalbraith]

Hmmm the details of the spec are beyond me, I'm afraid. My goal is just to prevent the non-keyword warning message from showing (i.e. #79) when I'm validating a simple json doc. My schema references the 2019-09 meta schema, and I'm getting these warning messages when validating documents:

WARN com.networknt.schema.JsonMetaSchema - Unknown keyword then - you should define your own Meta Schema. If the keyword is irrelevant for validation, just use a NonValidationKeyword
WARN com.networknt.schema.JsonMetaSchema - Unknown keyword additionalItems - you should define your own Meta Schema. If the keyword is irrelevant for validation, just use a NonValidationKeyword

[stevehu]

@pgalbraith Let's first prevent the message shown up. The additionalItems keyword is defined in the spec, but I don't think anybody is using it. We can implement it when someone needs it.