2.2. Creating the Data Model
Let’s create a Contract entity class.
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In the Data Model section of the CUBA project tree click New > Entity. The New CUBA Entity dialog window will appear.
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Enter the name of the entity class –
Contract– in the Entity name field and click OK button. The Entity Designer page will be displayed in the workspace. -  
Using the Entity Designer add attributes:
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numberof the typeString -  
dateof the typeDate -  
stateof the typeString 
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Contract entity creation is now complete.