Method: Overload __unset() to provide access via properties

Method: Set the iquery.

Method: Create a new IRI object, from a specified string

Method: Set the ifragment.

Method: Create a new IRI object by resolving a relative IRI

Method: Convert an IRI to a URI (or parts thereof)

Method: Parse an IRI into scheme/authority/path/query/fragment segments

Method: Get the complete IRI