Description
Procedural style:
bool 
tidy_is_xml ( resource tidy)
Object oriented style:
object 
tidy->isXml ( void )
     This function returns TRUE if the specified tidy
     object is a generic XML document (non HTML/XHTML), or FALSE otherwise.
    
| 警告 | 
| 
      This function is not yet implemented in the Tidylib itself, so it always
      return FALSE.
      |