* dom/dom-builder.lisp (DOM-BUILDER): Inherit from
sax:content-handler.
* klacks/klacks-impl.lisp (KLACKS-DTD-HANDLER): Inherit from
sax:default-handler.
* klacks/klacks.lisp (KLACKS:SERIALIZE-EVENT): Bugfix -- call
start-cdata and end-cdata on the handler, not the source.
* xml/package.lisp: New export WITH-OUTPUT-SINK.
* xml/sax-handler.lisp (SAX): New exports abstract-handler,
content-handler, default-handler. (STANDARD-ATTRIBUTE): Renamed
from attribute. (ATTRIBUTE-NAMESPACE-URI, ATTRIBUTE-LOCAL-NAME,
ATTRIBUTE-QNAME, ATTRIBUTE-VALUE, ATTRIBUTE-SPECIFIED-P): Wrapper
methods for standard-attribute. Wrapper methods for
hax:standard-attribute. (all events): pulled into a common
define-event form. New dummy method on null. Added a warning to
the default method. New error method on abstract-handler. New
dummy method on the respective default handler classes.
* xml/sax-proxy.lisp (BROADCAST-HANDLER): Inherit from
abstract-handler, not sax-parser-mixin.
* xml/unparse.lisp (sink): Inherit from sax:content-handler.
(WITH-OUTPUT-SINK): New macro. (INVOKE-WITH-OUTPUT-SINK): New
function.
