3. Introduction to Modeling 1. Plan for Today's Class 2 ... - Courses

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3. Introduction to Modeling Page 4 of 12 Engineering [1] • In "Document Engineering" we can look at artifacts in the world like printed documents or other things that are tangible • But what we really care about is the information or intangible content about things in the world that documents contain • In Document Engineering the instances or implementations on which physical models are based include printed documents and forms, electronic documents and forms, databases, APIs, and other actual descriptions of information sources 9. Document Instances are External Views • So we treat document instances as External views in the classical modeling framework Moby Dick Herman Melville 0804900337 Airmont file://C:\Documents%20and%20Settings\glushko\My%20Documents\SIMS%20Courses\le... 1/26/2005
3. Introduction to Modeling Page 5 of 12 10. Schemas are Physical Views • Document Implementation Models or Document Schemas are what we call Physical views 11. Modeling for Design or Re-Design • The next purpose of modeling is to assist in the design or re-design of a system • This modeling activity is usually called "systems design" or simply "design" • Design abstracts away or generalizes from the technology and implementation details in the physical model • A model that is implementation-independent is often easier to talk about than one that is encoded in a specific technology context 12. Modeling for Design or Re-Design – Conceptual Models • Models of things as they could be are Conceptual or To-Be models • In Document Engineering the goal of design is to create "core components" that describe the information used in a set of documents, databases, forms, APIs in a way that can be used by any of them file://C:\Documents%20and%20Settings\glushko\My%20Documents\SIMS%20Courses\le... 1/26/2005
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3. Introduction to Modeling 1. Plan for Today's Class 2 ... - Courses

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