Advantages of Controlled Vocabulary Language

1. Increases the probability that both indexer and searcher will express a particular concept in the same way.

2. Increases the probability that the same term will be used by different indexes or by the same indexer at different times.

3. Help searchers to focus their thoughts when they approach the information system without a full and precise realization of what information they need.


              Disadvantages of  Controlled Vocabulary Language

1. Incompatibility of different indexing languages.

2. High input cost.

3. The possibility of inadequate vocabulary.