if s.find("/") < 1:
            s = "audio/" + s
        #
        return s
    
    # remove SGML/XML entities
    def entity_decode(self, s):
        return xml.sax.saxutils.unescape(s).replace("&nbsp;", " ")
    
    # convert special characters to &xx; escapes
    def xmlentities(self, s):
        return xml.sax.saxutils.escape(s)
    
    # Extracts integer from string
    def to_int(self, s):