What are these in the UML Class Diagram?

I'm studying Enterprise Architect.

Abstract means being abstract Is Root means top-level parent class Is Leaf means no more children

But I still don't know Is Specification, is Active. The documentation I found defined it this way I don't know what this means. Is Specification : Select the checkbox to identify the element as being a specification. is Active : Select the checkbox to identify the element as being an Active Class.

Who can answer me?

All of them are element properties. Some of them are heritage and the naming is not consistent with the current UML 2.5.1 specs where you can find these:

• Abstract matches the isAbstract property.
• Is Leaf matches isLeaf
• Is Abstract matches isAbstract

Heritage from UML 1.5 (no longer in 2.5.1):

• Is Root matches isRoot
• Is Specification matches isSpecification