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   Re: Next Round

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  • From: "Don Park" <donpark@quake.net>
  • To: "XML Developers' List" <xml-dev@ic.ac.uk>
  • Date: Wed, 20 Jan 1999 17:56:18 -0800


>I'd like to lose EntityResolver and DTDHandler (who uses them?), but I
>don't know if we can.

I don't recommend this.  People are using it.

>1. Filter Interface

I agree with James that DocumentHandler is the appropriate place.

>2. Lexical Event Handler

Looks good.

>Of course, we need a new parser interface that knows about lexical

Or we could just redefine setDocumentHandler so that LexicalHandler is
automatically set if the given DocumentHandler implementation also
implements that interface.  The two interfaces are strongly related after

>3. Namespace Support

How about  this?

public interface NamespaceHandler {
    public void startNamespace(Namespace ns);
    public void endNamespace();

public interface Namespace {
    public String getPrefix(String qname);
    public String getURI(String qname);

Namespace implemention is responsible for keeping track of inheritance.
Again, we can use setDocumentHandler to automatically check for
NamespaceHandler implementation.

For efficiency sake, we might also require that if NamespaceHandler is
supported then all names (tag name, attribute name, namespace prefix and
URI) should be 'interned'.


Don Park

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