The domain model that the DSL tools wizard has put into your solution is a nearly empty one and looks like this:
The shapes in the domain model describe classes, and the lines between them describe relationships.
In order to allow you to finish the lab in the allotted time, we are going to load in a prepared domain model for the business entity designer.
Close the domain model by clicking on File | Close
In the Solution Explorer, right-click on the DomainModel project, and choose Add->Existing Item.
Set the Files of Type: filter to All Files.
In the File Name: box, type c:\dsl\BizEntity.dmd. Click the Add button.
Confirm you want to replace the existing file.
In the Solution Explorer, double-click on the BizEntity.dmd file you just added, which will be located in the DomainModel project. The domain model will look like this:
This diagram defines the structure of the domain model, which is made up of classes (grounded rectangles) and relationships between classes (lines). To get a better idea of what this notation means, let's take a closer look at the Entity class:
Open up the Entity shape by clicking on the little "+" sign. Note: three "Entity" shapes appear in the diagram because the Entity class is referenced by other classes; the shape you should click on is in the lower portion of the diagram, indicated by the red arrow in the image above.
Here we see that classes may contain value properties. The "Entity" class has two value properties, "Kind" and Description". You can click on the value properties to see details about them in the Properties window in the lower right corner of Visual Studio.
An entity may reference another entity. This is indicated by the dotted line labeled “ReferencedEntity”. You can select the relationship in the diagram by clicking on the dotted line to see its details in the Properties window again. Notice that the name of this relationship is “Association”; the names of its two roles (ends) are ReferencedEntity and ReferringEntities. The roles are represented in the diagram by the small triangular and rectangular shapes appearing on the line. You can also click on these to view properties about them.
An Entity contains Attributes. This containment is indicated by the solid line between the “Entity” class and the “Attribute” class, labeled “Attributes”. You can open up the Attribute shape and have a look at its value properties.
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