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Data
Architect Professional database modeling |
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Unlike Diagram - a LM can have child objects which are not drawn on the document. These child objects are not shapes and are only shown in the browser and the LM properties dialog |
Icon |
Name |
Shape |
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Entity |
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Relationship |
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Association |
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Association Link |
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Inheritance Link |
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Business Rule |
|
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Domain |
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Data Item |
line-end |
contribution |
meaning |
description |
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1 |
mandatory | This entity contributes exactly 1 instance to
the relationship. |
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1-n* |
many + mandatory |
This entity may contribute at most, n,
instances to this relationship. The entity will contribute at least 1 instance to the relationship. |
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0-n |
many + optional |
This entity may contribute at most, n,
instances to this relationship. This entity may contribute nothing to the relationship. |
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0-1 |
optional |
This entity may, or may not, contribute to
this relationship but never more than 1 instance. |