InstanceSpecifications with links and Slots Gallery Tutorial TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo Section 01:02: UML 101 for model-based systems engineering with SysML Slide kind UML Class Diagram
InstanceSpecification::specification : ValueSpecification [0..1] ... A specification of how to compute, derive, or construct the instance. Source Unified Modeling Language 2.5.1
InstanceSpecification::classifer : Classifier [0..*] ... The Classifier or Classifiers of the represented instance. If multiple Classifiers are specified, the instance is classified by all of them. Source Unified Modeling Language 2.5.1