Properties vs. Relationships

[harold-owen]

There appears to be a possible misuse of the terms "Properties" and "Relationships" throughout the vulntology. Consider Vulnerability has a vulnerability-identifier, but in vulnerability.md, the identifier is not listed under the Properties heading. Instead, each of the so called Properties is actually a relationship (line) on the graph.

Note also in explanation.md the term Properties is defined in terms of a relationship:

Properties: A connection relating a Type to a SubType or an Object to a Type.

See also Issue 9 in which lines on the graph are mislabeled "Property".

[david-waltermire]

I also raised the concern about vulnerability identifiers in #3. I agree that we need to handle identifiers as actual properties and/or relationships.

[Chris-Turner-NIST]

Due to the confusion I have removed any references in the visual to the inherent identifiers for each object. I have also modified the visual to better describe what is a relationship and what is a property. I have also modified the text in explanation.md to imply a difference between a property and a relationship. I believe there will still be some confusion here since properties do have their own desired cardinality constraints.