A common pattern is to use the same schema to validate multiple documents. In the current API, this requires a bunch of work involving the innards of the implementation:

1. Create a lexer.
2. Create a parser.
3. For each document to be parsed, create a validator, since validators are single-shot.

A nicer API would be something like:

let cddl_schema = CDDLSchema::from_slice(my_schema_bytes);
for document in documents {
    cdd_schema.validate(document)?
}