Implement Chen Notation for ER-diagrams #1718
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You really did a great job! Many thanks for your contribution. Now you can think about document it on http://alphadoc.plantuml.com/doc/markdown/en/er-diagram |
The-Lum
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Add keywords: - `relationship` New PlantUML Keywords from: - plantuml/plantuml#1718
The-Lum
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Apr 10, 2024
According to `Chen` diagram and new PlantUML Keywords from: - plantuml#1718 Add `Chen` diagram on: - Syntax _(improve Language Descriptor (to follow plantuml/backlog#4))_ - Sub-diagram - Readme _(Similar to plantuml#1669)_ _[FYI @Benjamin-Davies]_
This was referenced Apr 10, 2024
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Implements #945
Allows users to conceptually describe database models as Entity-Relational diagrams using Chen's notation. Although this notation appears to have fallen out of use, it is still taught in universities, so it would be nice if those students could use more modern tooling to draw their ER diagrams.
In addition to parsing the new file format, I've also added some new rendering classes as there was no existing way to draw diamonds with text in them or subset symbols in the middle of links.
I've added some simple
nonregtests to test the rendering output. I've also added some tests for the behaviour of the new commands.