SAX2 Queries (was Re: Announcement: SAX2 1999-06-01 alpha release for Java)
david at megginson.com
Wed Jun 2 16:19:17 BST 1999
Lars Marius Garshol writes:
> - Should we have a CompleteHandlerBase in helpers which combines
> HandlerBase, DeclHandler, LexicalHandler and NamespaceHandler?
I'm reluctant, because I don't want to hard-code the optional handlers
into the interface any more than I have to. Right now, the separate
handler classes are present, but they are nowhere referred to. In the
future, we may need to add new handler types (SchemaHandler?), and I
don't want to have to change existing classes when we do so.
> - If one of the misc handlers are supported, must all the methods in
> it be supported? (For example, xmlproc currently won't support the
> CDATA callbacks in LexicalHandler.)
Opinions, anyone? Clearly, matching start/end events have to be both
implemented or both skipped, but otherwise, what are people's
> - Should the *NamespaceDeclScope methods be called *NamespaceScope
> instead? It's a little less of a mouthful, at least.
I thought about it, but the problem is that it's not the scope for the
namespace, only for the declaration; the same namespace might be
mentioned in several nested declarations.
> - Do we need to mandate a default value for namespace separator?
> Should it be space ( )?
Yes, we do need a default. The DOM WG is struggling with this as
well, and we might be able to piggy-back.
Personally, I like  , but I recall that John Cowan is partial to
> - Can namespace properties be tuned when namespace processing is off?
No -- we need to make that clear
> - Should we add a DTDParser interface? In some cases one will only
> want to parse the DTD and since we have DeclHandler and DTDHandler
> it makes sense to me to add an interface to a DTD parser. Maybe
> like so:
I don't think that we need a separate interface. After all, you could
create SAX parsers for RTF, HTML, LaTeX, or just about anything --
there's no reason that someone couldn't create a SAXDTDParser class
implementing Parser and Configurable, where the class tried to parse a
DTD rather than a complete document.
> - Where did AttributeList2 go?
I was wondering if anyone would notice. I'm still not sure how to
handle that -- should there be a feature that you can use to check
whether the parser can deliver an extended attribute list?
All the best,
David Megginson david at megginson.com
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