Once you have identified your intended audience, use their terminology. Thus your readership will identify with your information system and be more likely to use it again and again. Create a hierarchial system of ideas By definition, a hierarchial system of ideas begins with broad terms and is subdivided into narrower terms. There is no perfect hierarchial system of ideas, but your intended audience will bring to your system some preconceived ideas on how information on their topic should be organized. These people will have similar, but not exact preconceptions.
Biologist think similarly, just as computer scientists think similarly.
Create a hierarchial system fitting the preconceptions of as much of your intended audience as possible. At this point it may be helpful to employ the use of a specialized thesaurus or handbook written for your audience. This thesaurus or handbook will contain definitions of the discipline's terminology. These tools will help clarify and provide a structure for your hierarchial system. Make sure the system is exhaustive as well as flexible.