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Using the "slot" element described in A.1 it is possible to define diagrams that represent a template for concept definition or expressions. It is then possible to use this template to create concepts or expressions by filling the "slots" with appropriate concepts.

Figure 27 Example template diagram using "slots"

These template diagrams are a specialisation of concept definition diagrams as described in section 3.2; however some of the attribute value concepts are replaced by "slots" making the definition general and reusable.

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