Cannot self validate meta schema

[vicary]

JSON Schema should be possible to self-validate for both

1. meta core schema, and
2. meta hyper-schema

To be exact, its the content of "id" field and "$schema" field, which yields the following error.

[ { property: '',
    message: 'Invalid schema/property definition http://json-schema.org/draft-04/schema#' } ]

I am not sure if the correct logic should ignore these values, any thoughts?