JSONScript uses JSON-Schema standard both for the validation schemas and for the schema that defines evaluation process.

JSONScript schema the schema that does not validate scalar keywords in instructions (keyword values can be scripts and have to be validated when the script is evaluated).

JSONScript strict schema the schema that validates scalar keywords in instructions.

JSONScript evaluation schema this schema defines evalution process. It can be used by implementations to evaluate scripts. It contains non-standard keywords.

Instruction definition schema the schema for instruction defnitions. The definitions of both standard and user-defined instructions should be valid according to this schema.