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• An architectural

• An architectural entity/relationship diagram is essentially a graphicportrayal of English language assertions * about an organization.• Therefore, the only language to appear on a diagram must be in termsrelevant to the domain of interest.• Only business terms (and conventional English) may be used as thenames of entity classes, attributes, and the names of roles.• That is, no abbreviations, computer terms, or acronyms.• Words are not linked or concatenated together. Spaces between wordsare shown (“Line Item”, not “lineItem”, or “line_item”).* … or assertions in any other natural language, such as Polish, French, Chinese, orwhat have you.Copyright © 2012, Essential Strategies, Inc20/71 32

• The name of an entity class is in the singular, and refersto an instance of that class.– Hence, Order and Line Item are acceptable.– The name “Project history” is not.– An entity class called Project, on the other hand, could containinstances over time, so it may in fact be a project “history”– Database table names are not allowed, nor are abbreviations oracronyms.– Classes that are computer artifacts (“window”, “cursor”, and the like)are not allowed.Copyright © 2012, Essential Strategies, Inc/71 33

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