Merits and Deficiencies 

SLSH is comparatively simpler to use than the LCSH. -The rules and principles are fairly explicit in their directions, containing scope notes and specific instructions for their use. If followed consistently, SLSH will provide useful reference guide for the user and also to the library reference staff. The- major inadequacies in SLSH as well as' LCSH are that these subject heading lists are not backed up by theoretical foundations intrinsic to subject indexing. With the growth of knowledge throwing forth new subjects and intricate facet and phase relations, these enumerated subject heading lists are not equipped to respond to new challenges in subject cataloguing.