Text retrieval software for the Web

Text Retrieval Systems (TRS) are a well-known type of program in the sphere of information and documentation, especially as they are designed for the retrieval of text and cognitive documents. The main characterisitcs can be summarized as follows: they have a flexible record model (variable length fields, multiple value fields, etc.), they facilitate access to logs through reverse indexing, contain a varied set of data-recovery features, and are provided with diverse instruments for terminology control. Some of the best known and prevalent systems are CDS/ISIS, FileMaker, Knosys, and Inmagic DB/Text.