Tags and keywords
The basic idea is that you can "logically" group members according to some text:
SysML-1.6: 'The criterion for membership in an element group is specified by the body of the comment the stereotype is applied to. By grouping elements, the modeler asserts that the criterion of the group applies to the member.'And you can optionally order the members:
SysML-1.6: 'Optionally, members of an element group can be ordered using its orderedMember property.'Note that:
SysML-1.6: 'Element groups do not own their elements and thus an element can participate in an unlimited number of groups.'Therefore:
The grouping of member elements by an ElementGroup is denoted here "logical" in the sense that it does not "steal ownership" of member elements (as opposed to "physical" ownership of elements in the model)There is an optional 'name' attribute:
SysML-1.6: 'Element groups are named using the name property.'