Macro Type_Of(Id) returns one of following constants for given Id:

UNDEFINED_ID,    ARRAY_ID,       CAMERA_ID,
COLOR_ID,        COLOR_MAP_ID,   DENSITY_ID,
DENSITY_MAP_ID,  FINISH_ID,      FLOAT_ID,
FOG_ID,          FUNCTION_ID,    INTERIOR_ID,
LIGHT_SOURCE_ID, MATERIAL_ID,    MEDIA_ID,
NORMAL_ID,       NORMAL_MAP_ID,  OBJECT_ID,
PIGMENT_ID,      PIGMENT_MAP_ID, RAINBOW_ID,
SKY_SPHERE_ID,   SLOPE_MAP_ID,   SPLINE_ID,
STRING_ID,       TEXTURE_ID,     TEXTURE_MAP_ID,
TRANSFORM_ID,    VECTOR_ID

Macro Type_Of_Spline(Id) returns one of following constants for given Id:

NOT_SPLINE,    AKIMA_SPLINE,      BASIC_X_SPLINE,
CUBIC_SPLINE,  EXTENDED_X_SPLINE, GENERAL_X_SPLINE,
LINEAR_SPLINE, NATURAL_SPLINE,    QUADRATIC_SPLINE,
SOR_SPLINE,    TCB_SPLINE

Macro Type_Of_Object(Id) returns one of following constants for given Id:

NOT_OBJECT,          BICUBIC_PATCH_OBJECT,   BLOB_OBJECT,
BOX_OBJECT,          CONE_OBJECT,            CUBIC_OBJECT, 
CYLINDER_OBJECT,     DISC_OBJECT,            HEIGHT_FIELD_OBJECT, 
INTERSECTION_OBJECT, ISOSURFACE_OBJECT,      JULIA_FRACTAL_OBJECT, 
LATHE_OBJECT,        MERGE_OBJECT,           MESH_OBJECT, 
PARAMETRIC_OBJECT,   PLANE_OBJECT,           POLY_OBJECT, 
POLYGON_OBJECT,      PRISM_OBJECT,           QUADRIC_OBJECT, 
QUARTIC_OBJECT,      SMOOTH_TRIANGLE_OBJECT, SOR_OBJECT, 
SPHERE_OBJECT,       SPHERE_SWEEP_OBJECT,    SUPERELLIPSOID_OBJECT, 
TEXT_OBJECT,         TORUS_OBJECT,           TRIANGLE_OBJECT, 
UNION_OBJECT

Macro Type_Of_Camera(Id) returns one of following constants for given Id:

NOT_CAMERA,         CYLINDER_CAMERA,     FISHEYE_CAMERA
OMNIMAX_CAMERA,     ORTHOGRAPHIC_CAMERA, PANORAMIC_CAMERA,
PERSPECTIVE_CAMERA, SPHERICAL_CAMERA,    ULTRA_WIDE_ANGLE_CAMERA,
USER_DEFINED_CAMERA