Please note : This help page is not for the latest version of Enterprise Architect. The latest help can be found here.
Model XSD
You can model XML schemas at two levels, using UML Class diagrams that:
| · | Have no XML schema-specific implementation details, to be generated directly by Enterprise Architect's Schema Generator; the generator applies a set of default mappings to convert the abstract model Package to a W3C XML Schema (XSD) file |
| · | Are refined with XML schema-specific definitions using the XML Schema pages of the Diagram Toolbox, which provides the structures of the UML profile for XSD |
Model an XML Schema
Step |
Action |
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1 |
In the Project Browser, create the top-level project structure you need (Model and Views), and click on the appropriate View. |
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2 |
Click on the New Package icon in the Project Browser toolbar. The New Model Package dialog displays.
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3 |
In the Name field type the name of the new Package, and select the Create diagram radio button. Click on the OK button. The New Diagram dialog displays.
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4 |
In the Name field type the name of the new diagram. In the Select From panel select UML Structural, and in the Diagram Types panel select Class.
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5 |
Click on the OK button. In the Project Browser, double-click on the icon next to the new diagram's name; the diagram opens in the Diagram View, with the Class pages displaying in the Diagram Toolbox. At this point you can either:
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6 |
Click on the More tools option in the Toolbox and select Extended | XML Schema to display the XML Schema Toolbox pages.
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7 |
Click on the Schema icon from the Toolbox and drag it into the Class diagram. The XSD schema Properties dialog displays. Complete this dialog, and click on the OK button. The New Diagram dialog displays.
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8 |
Again, in the Name field type the name of the new diagram. In the Select From panel select UML Structural, and in the Diagram Types panel select Class. Click on the OK button.
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9 |
An XSDschema stereotyped Package is created in the Project Browser and on the diagram, with a child Class diagram. Double-click on the Package on the diagram to open the child Class diagram, and use the constructs from the XML Schema Toolbox to model the XML Schema. |
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Notes
| · | The UML attributes of the Classes map directly to XML elements or attributes |
| · | If you have modeled your XSD Schema as a straight Class diagram, you can define and generate schema from it using the Schema Composer |
| · | Classes in an XML Schema model have no methods since there is no meaningful correspondence between Class methods and XSD constructs |
| · | Modeling Restrictions - the following XML Schema constructs cannot be modeled in Enterprise Architect: |
| · | appinfo |
| · | field |
| · | key |
| · | keyref |
| · | notation |
| · | redefine |
| · | selector |
| · | substitutionGroup |
| · | unique |
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