typedef struct { ... } SilcAttributeObjGeo;

    SILC_ATTRIBUTE_GEOLOCATION type object.  The caller must free the
    strings inside the structure.

    typedef struct SilcAttributeObjGeoStruct {
      char *longitude;              /* Longitude */
      char *latitude;               /* Latitude */
      char *altitude;               /* Altitude */
      char *accuracy;               /* Accuracy in meters */
    } SilcAttributeObjGeo;