Issue 18076: Location: 18.2 Classifier Descriptions Extend Constraints. 695 - Extensions must be a DAG (uml25-ftf) Source: Lockheed Martin (Mr. Michael Jesse Chonoles, michael_chonoles2(at)omg.org) Nature: Uncategorized Issue Severity: Significant Summary: Missing constraint or discussion anywhere that the chain of extends relations must not contain loops Resolution: Revised Text: Actions taken: September 28, 2012: received issue Discussion: End of Annotations:===== s is issue # 18076 Problem: 18.045 Severity: Medium Type: Missing material Location: 18.2 Classifier Descriptions Extend Constraints. 695 Title Extensions must be a DAG Description: Missing constraint or discussion anywhere that the chain of extends relations must not contain loops Source: Michael Jesse Chonoles