A parsing event. The contents of the event are accessed as an +Array?, and
the type is given either by the ...? methods, or by accessing the
type accessor. The contents of this object vary from event to
event, but are identical to the arguments passed to +StreamListener+s for each event.
The type of this event. Will be one of :tag_start, :tag_end, :text, :instruction, :comment,
:doctype, :attlistdecl, :entitydecl, :notationdecl, :entity, :cdata,
Due to the wonders of DTDs, an entity declaration can be just about
anything. There's no way to normalize it; you'll have to interpret the
content yourself. However, the following is true:
If the entity declaration is an internal entity: [ String name, String
value ]