Requires the token immediately before to be of a type in LIST.
Requires the token immediately after to be of a type in LIST.
Requires there to be an element before this one. Also requires that the element is of a type in LIST.
Pseudotype NONE indicates no element.
Requires there to be an element after this one. Also requires that the element is of a type in LIST.
Pseudotype NONE indicates no element.
Where TYPE represents a certain type of element, specifically a node, the hashref collection RULES of additional rules will be applied to the element.