SACM — Incorporate 7.2.1 Element (abstract) (p16) in a coherent way into merged SACM metamodel

Incorporate 7.2.1 Element (abstract) (p16) in a coherent way into merged SACM metamodel

delete the section 10.1.1. Element (abstract).
Change the description of the EvidenceElement (section 10.1.2, page 35, from:
EvidenceElement is an abstract class that represents the primary elements of the Evidence
Metamodel.
into:
EvidenceElement class is the root element of the SACM Evidence Metamodel. All other
classes in the SACM Evidence Metamodel extend EvidenceElement. The main subclass
of the Element is EvidenceItem, which defines the primary elements of the Evidence
Metamodel. Other elements represent various secondary elements and dependent parts of
other evidence elements. The following elements are direct subclasses of
EvidenceElement: EvidenceItem, EvidenceAssertion, and ProjectElement.
Change the 1st sentence of the semantics section into following:
EvidenceElement class is an abstract class that represents any element of the SACM
Evidence Metamodel. Every class of the SACM Evidence Metamodel extends
EvidenceElement directly or indirectly (through other classes).