nsIExtendedExpatSink Interface

 Called when a prefix mapping is no longer in-scope, after any
 endElement events.
 @param aPrefix The prefix that was being mapped. This is the empty string
                when a default mapping scope ends.

void handleEndNamespaceDecl(in wstring aPrefix)

 This is called for a declaration of notation.  The base argument is
 whatever was set by XML_SetBase. aNotationName will never be
 null. The other arguments can be.
 @param aNotationName The notation name.
 @param aSysId The notation's system identifier, or null if none was given.
 @param aPubId The notation's pubilc identifier, or null if none was given.

void handleNotationDecl(in wstring aNotationName, in wstring aSysid, in wstring aPubid)

 Called at the beginning of the DTD, before any entity or notation
 events.
 @param aDoctypeName The document type name.
 @param aSysid The declared system identifier for the external DTD subset,
               or null if none was declared.
 @param aPubid The declared public identifier for the external DTD subset,
               or null if none was declared.

void handleStartDTD(in wstring aDoctypeName, in wstring aSysid, in wstring aPubid)

 Called when a prefix mapping starts to be in-scope, before any
 startElement events.
 @param aPrefix The Namespace prefix being declared. An empty string
                is used for the default element namespace, which has
                no prefix.
 @param aUri The Namespace URI the prefix is mapped to.

void handleStartNamespaceDecl(in wstring aPrefix, in wstring aUri)

 This is called for a declaration of an unparsed (NDATA) entity.
 aName, aSysid and aNotationName arguments will never be
 null. The other arguments may be.
 @param aName  The unparsed entity's name.
 @param aSysId The notation's system identifier.
 @param aPubId The notation's pubilc identifier, or null if none was given.
 @param aNotationName The name of the associated notation.

void handleUnparsedEntityDecl(in wstring aName, in wstring aSysid, in wstring aPubid, in wstring aNotationName)