I created a class “ALTableRelationLinkTool” that extends “GenericLinkTool” and it works good with the override of acceptFirstElement and. My purpose is to create a custom AssociationEnd in the command palette. I’m facing some problems extending the class GenericLinkTool. Create free ER diagrams with an easy-to-use online drawing tool with no ad, no limited period of access and no limitations such as, number of diagrams, number of shapes and etc. You will then see symbols to draw ER diagram including entity, attribute, relationship, and connector. Visual Paradigm Online (VP Online) Free Edition is a FREE online drawing tool that features an intuitive ERD editor. To start with, first, you need to select ER from the drop-down menu at left. My tool definition is slightly different: It's usually a good practice to use qualified metaclass names, we have a few homonyms in the UML and ArchiMate metamodels. Dia is a free and open source ER diagram creator for Windows.
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