Do you actually have a specific legal question you wanted answering about this?
It really depends on the kind of service that you are offering. Solicitors have to retain copious information firstly on each file and secondly in respect of the multiplicity of legal books and case law. You only have to visit a law library.
If you can give me an example of how this is used in another industry, I can give you an idea how it may or may not be useful for the legal profession.