Escape one reference token for embedding in a pointer string.
Evaluate a parsed pointer against a document. Returns null when any token does not resolve.
Split a JSON Pointer into unescaped reference tokens. The empty pointer yields an empty array. Returns false for syntactically invalid pointers (not starting with '/', or a bad ~ escape).
RFC 6901 JSON Pointer: parsing, escaping, and evaluation against the internal document representation. Used for $ref fragment resolution.