Element structure builder for XML source data, based on the
html are predefined HTML entities. This flag is not supported
by the current implementation.
target is the target object. If omitted, the builder uses an
instance of the standard TreeBuilder class.
Finishes feeding data to the parser.
An element structure.
name, pubid, system)
Handles a doctype declaration.
name is the doctype name.
pubid is the public identifier.
system is the system identifier.