...
The role group that must have the same attributes can be represented as a named role group by syntax such as @rolegroup . All attributes needs to be same for the name role group. For example, bilateral fracture of femur bone. Each named @rolegroup must have finding site and associated morphology. If an optional attribute is present in a named role group, this attribute must be present in the rest role group with same name.
Default value
A default value could be specified and populated in the authoring platform when a range is specified in the template.