nsIExpatSink Interface

 Called to handle a CDATA section
 @param aData the text in the CDATA section.  This is null-terminated.
 @param aLength the length of the aData string

void HandleCDataSection([size_is(aLength)] in wstring aData, in unsigned long aLength)

 Called to handle character data.  Note that this does NOT get
 called for the contents of CDATA sections.
 @param aData the data to handle.  aData is NOT NULL-TERMINATED.
 @param aLength the length of the aData string

void HandleCharacterData([size_is(aLength)] in wstring aData, in unsigned long aLength)

 Called to handle a comment
 @param aCommentText the text of the comment (not including the
        "<!--" and "-->")

void HandleComment(in wstring aCommentText)

 Called to handle the doctype declaration

void HandleDoctypeDecl(in AString aSubset, in AString aName, in AString aSystemId, in AString aPublicId, in nsISupports aCatalogData)

 Called to handle the closing tag of an element.
 @param aName the fully qualified tagname of the element

void HandleEndElement(in wstring aName)

 Called to handle a processing instruction
 @param aTarget the PI target (e.g. xml-stylesheet)
 @param aData all the rest of the data in the PI

void HandleProcessingInstruction(in wstring aTarget, in wstring aData)

 Called to handle the opening tag of an element.
 @param aName the fully qualified tagname of the element
 @param aAtts the array of attribute names and values.  There are
        aAttsCount/2 names and aAttsCount/2 values, so the total number of
        elements in the array is aAttsCount.  The names and values
        alternate.  Thus, if we number attributes starting with 0,
        aAtts[2*k] is the name of the k-th attribute and aAtts[2*k+1] is
        the value of that attribute  Both explicitly specified attributes
        and attributes that are defined to have default values in a DTD are
        present in aAtts.
 @param aAttsCount the number of elements in aAtts.
 @param aIndex If the element has an attribute of type ID, then
        aAtts[aIndex] is the name of that attribute.  Otherwise, aIndex
        is -1
 @param aLineNumber the line number of the start tag in the data stream.

void HandleStartElement(in wstring aName, [array, size_is(aAttsCount)] in wstring aAtts, in unsigned long aAttsCount, in long aIndex, in unsigned long aLineNumber)

 Handle the XML Declaration.

 @param aVersion    The version string, can be null if not specified.
 @param aEncoding   The encoding string, can be null if not specified.
 @param aStandalone -1, 0, or 1 indicating respectively that there was no
                    standalone parameter in the declaration, that it was
                    given as no, or that it was given as yes.

void HandleXMLDeclaration(in wstring aVersion, in wstring aEncoding, in long aStandalone)