The feedback language aspect defines custom messages to show to the user when an error or a warning is detected in the model.
The FeedbackPerConceptRoot concept is used to define feedback massages for a particular concept. It holds a collection of FeedbackRootMembers which define the condition to check for and a message to show. In addition to using text, the message may refer to the language elements to provide more details about the problem:
child - the (unexpected) child node that is causing a problem
link - the link (role) of the problematic child node
node - the node with the reported problem
property - a property with a violated constraint
value - a value that is invalid for a property
concept - the concept of the target of the invalid reference
reference - the reference that is out of scope
Additional feedback rules are likely to be added in the future.
