rationale Rationale

Identifies why this milestone exists, what problem it is solving, and/or what object cannot be modeled using the regular hierarchy.

Usage/Remarks

Best Practice

Although not required by the Tag Set, this should be treated as a required attribute and a value always provided when milestones are used.
OPTIONAL on elements: <milestone-end>, <milestone-start>
Value Meaning
Text, numbers, or special characters The reason for a milestone, or information about an object that cannot be modeled using the regular hierarchy.
Restriction @rationale is an optional attribute; there is no default.