Pack URI
A package is a logical entity that holds a collection of parts. This Open Packaging specification defines a way to use URIs to reference part resources inside a package. This approach defines a new scheme in accordance with the guidelines in RFC 3986.
The following terms are used as they are defined in RFC 3986: scheme, authority, path, segment, reserved characters, sub-delims, unreserved characters, pchar, pct-encoded characters, query, fragment, and resource.