Abstract
Relational data analysis (RDA) and Logical data modelling (LDM) are two different but complementary ways to identify and specify data requirements. LDM works from the top down, taking an overview of the data model and gradually adding more information, while RDA works from the bottom up, starting with arbitrary data groups and forming larger groups that correspond to the entities and relationships of the LDM.
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© 1995 J. Duncan, L. Rackley and A. Walker
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Duncan, J., Rackley, L., Walker, A. (1995). Step 340 — Enhance Required Logical Data Model. In: SSADM in Practice. Macmillan Computer Science Series. Palgrave, London. https://doi.org/10.1007/978-1-349-10341-6_6
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DOI: https://doi.org/10.1007/978-1-349-10341-6_6
Publisher Name: Palgrave, London
Print ISBN: 978-0-333-46999-6
Online ISBN: 978-1-349-10341-6
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