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Using just three relationships, various enterprise elements can be collected and connected: | Using just three relationships, various enterprise elements can be collected and connected: | ||
A [[link]] relationship describes an association between two elements. | *A [[link]] relationship describes an association between two elements. | ||
A [[flow]] relationship describes a behaviour or dynamic sequence between two elements, and the passing of [[objects]] between them. | *A [[flow]] relationship describes a behaviour or dynamic sequence between two elements, and the passing of [[objects]] between them. | ||
A [[tree]] relationship describes a containment or aggregation between a parent and a child element of the same type. | *A [[tree]] relationship describes a containment or aggregation between a parent and a child element of the same type. | ||
The link relationship is an association between two elements. By default it is non-directional and unnamed and just shows that the two elements are related. Links can also be made directional by giving them a direction and a name. The flow and tree relationships are unidirectional, describing a source and a target endpoint. If a bi-directional connection between elements is intended, two relationships should be defined: one from element A to element B and one from B to A. All three relationships can be displayed visually as a line or arrow, but also expressed implicitly through proximity, containment, indentation or alignment on a grid. | The link relationship is an association between two elements. By default it is non-directional and unnamed and just shows that the two elements are related. Links can also be made directional by giving them a direction and a name. The flow and tree relationships are unidirectional, describing a source and a target endpoint. If a bi-directional connection between elements is intended, two relationships should be defined: one from element A to element B and one from B to A. All three relationships can be displayed visually as a line or arrow, but also expressed implicitly through proximity, containment, indentation or alignment on a grid. | ||
Revision as of 17:40, 22 March 2023
Relationships
EDGY defines three types of relationships each of which can connect two elements to express their interplay. This limited number reflects a deliberately simplified model compared to other visual languages used in engineering practice.
Using just three relationships, various enterprise elements can be collected and connected:
- A link relationship describes an association between two elements.
- A flow relationship describes a behaviour or dynamic sequence between two elements, and the passing of objects between them.
- A tree relationship describes a containment or aggregation between a parent and a child element of the same type.
The link relationship is an association between two elements. By default it is non-directional and unnamed and just shows that the two elements are related. Links can also be made directional by giving them a direction and a name. The flow and tree relationships are unidirectional, describing a source and a target endpoint. If a bi-directional connection between elements is intended, two relationships should be defined: one from element A to element B and one from B to A. All three relationships can be displayed visually as a line or arrow, but also expressed implicitly through proximity, containment, indentation or alignment on a grid.