In the relation requringRequirement:RequirementUsage to requiredConstraint:ConstraintUsage, the name requringRequirement lacks an 'i'. It should be requiringRequirement.
Also in the relation addressingRequirement:RequirementUsage to addressedConcern:ConcernUsage, this name (requringRequirement) is used in the subsets attribute of addressingRequirement. This is an typo that should be corrected automatically when the name in the other relation will be corrected.
It's a very tiny typo.
In the relation requringRequirement:RequirementUsage to requiredConstraint:ConstraintUsage, the name requringRequirement lacks an 'i'. It should be requiringRequirement.
Also in the relation addressingRequirement:RequirementUsage to addressedConcern:ConcernUsage, this name (requringRequirement) is used in the subsets attribute of addressingRequirement. This is an typo that should be corrected automatically when the name in the other relation will be corrected.