question: public void comment ( char ch [ ] , int start , int length ) throws org . xml . sax . SAXException { if ( ch == null || start < 0 || length >= ( ch . length - start ) || length < 0 ) return ; append ( m_doc . createComment ( new String ( ch , start , length ) ) ) ; }
target:  Report an XML comment anywhere in the document. This callback will be used for comments inside or outside the document element, including comments in the external DTD subset (if read).