xml-dev - Re: SAX Version Conflicts (was Re: SAX 1.0beta)

[David.Brownell@Eng.Sun.COM (David Brownell)]

Versioning of APIs is in general a problem that few platforms claim
to have solved.  I think SAX is basically OK, since the January version
wasn't to be the "1.0" release.  The classic strategy is:

    - APIs in development can have incompatible changes.
	(SAX to date has been in development.)
    - Once they are "final", all changes must be compatible.
	(From now on ... )

For Java, see chapter 13 of the Java Language Specification:

    http://java.sun.com/docs/books/jls/html/13.doc.html

That doesn't address the JDK 1.2 package versioning work, but it does
give some background that may be useful for non-Java systems.

It also doesn't address the compatibility with respect to serialized
objects; a parser API should have no need to worry about that stuff
though!  I like the idea of never using serialization; instead, it's
safer to use Externalization, since developers must explicitly think
about such data interfaces.  (Hmm, data interfaces ... "XML"?  ;-)

- Dave


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