This file is indexed.

/usr/include/Yap/rtree_udi.h is in yap 6.2.2-6+b2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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#ifndef _RTREE_UDI_
#define _RTREE_UDI_

#ifndef _RTREE_
typedef void control_t;
#endif

/*Prolog term from :- udi(a(-,+,+)).
  User defined index announce
*/
extern control_t *RtreeUdiInit (Term spec,
                                void *pred,
                                int arity);

/*this is called in each asserted term that was declared to udi_init*/
extern control_t *RtreeUdiInsert (Term term, /*asserted term*/
                                  control_t *control,
                                  void *clausule); /*to store in tree and return
                                                     in search*/

extern void *RtreeUdiSearch (control_t *control);
extern int RtreeUdiDestroy(control_t *control);

#endif /* _RTREE_UDI_ */