UML241 — Number of Compliance Levels

In the OMG Unified Modeling Language (OMG UML), Infrastructure document,
it is said that this document, and the Superstructure document, should be
used in conjunction (page 9) as the two volumes cross-reference each other
and the specifications are fully integrated.

But on page 2 of the OMG Unified Modeling Language (OMG UML), Infrastructure
document we can find 2 compliance levels. And on page 2 of the OMG Unified
Modeling Language (OMG UML), Superstructure document (ptc/2010-11-14 version
2.4) we can find 4 compliance levels. Which is rioght ? Two our four ? As
both documents are integrated shouldn't them have the same explanation for
compliance levels ?

It gets a little confusing to understand this.

This issue has already been resolved by, or no longer applies to, the UML 2.5 Beta 1 specification.
Disposition: Closed - No Change