extern Lisp_Object Qmodification_hooks;
extern Lisp_Object Qcategory;
extern Lisp_Object Qlocal_map;
-extern Lisp_Object Qkeymap;
/* Visual properties text (including strings) may have. */
-extern Lisp_Object Qfont;
extern Lisp_Object Qinvisible, Qintangible;
/* Sticky properties. */