SAX for WAP binary XML
david at megginson.com
Wed Dec 15 17:05:03 GMT 1999
Stefan Haustein <stefan.haustein at trantor.de> writes:
> - WBXML adds some properitary extensions. For that reason, I added an
> interface "WapExtensionHandler". Can that interface or a similar one
> be included in org.xml.sax.wap? Who cares about extensions of
> org.xml.sax? Unfortunally, the ugly extensions cannot be ignored
> since they are alread used in the WML definintions.
The extensions should go in a different package, such as org.wap.sax.
> - The handler for the WAP extensions needs to be registered at the
> parser. WML depends on fixed "tag and attribute tables", other WBXML
> languages also may use similar tables. A mechanism to register the
> tables with the parser is needed. Thus, an extended Parser interface
> is needed (e.g. org.xml.sax.wap.WbxmlParser)
Again, that's not a problem at all, though SAX2 will have a more
general mechanism for this kind of thing.
> - WBXML is designed for small devices like a Palm Pilot. Deriving the
> WbxmlParser from org.sax.xml.Parser includes a lot of unneeded
> overhead. It could be a better solution to start a new hierarchy
> (WbxmlParser -> WapParser). A Wrapper could implements the full
> org.sax.xml.Parser interface for compatibility.
Certainly that could make a lot of sense. We kept the core SAX
interfaces very small so that they would be suitable for environments
with strict space constraints, but they still take up a few KB.
Building a SAX wrapper on top might make sense if every kilobyte
All the best,
David Megginson david at megginson.com
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