supplies specification for one parameter of a model behaviour. create a hyperlink supplies the location of some content describing the link supplies the location of the intended URL

Where a model behaviour uses more than one parameter, individual paramSpec elements should be grouped together using a paramList element, as above. Parameter specifications are provided within the valItem used to define a particular behaviour, which forms part of the specification of a model element's behaviour attribute. In the example above, the behaviour link has two parameters: content and link.

Using a desc element within a paramSpec is optional but recommended practice.