3.3. CSDP Step 1: From Examples to Elementary Facts
To specify what is required of an information system, we need to answer the question: What kinds of information do we want from the system? Clearly, any information to be output from the system must be stored in the system or be derivable by the system. Our first step is to begin with familiar examples of relevant information, and express these in terms of elementary facts. As a check on the quality of our work, we ask the following questions. Are the entities well identified? Can the facts be split into smaller ones without losing information? This constitutes step 1 of the conceptual schema design procedure.
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CSDP step 1: Transform familiar examples into elementary facts. |
For process modeling, ...
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