Allows the expression of relationships between STIX components. It is extended by each component relationship type to add the component itself.
The confidence field specifies the level of confidence in the assertion of the relationship between the two components.
The Information_Source field specifies the source of the information about the relationship between the two components.
The relationship field characterizes the type of the relationship between the two components.
This field is implemented through the xsi:type controlled vocabulary extension mechanism. No default vocabulary type has been defined for STIX 1.2. Users may either define their own vocabulary using the type extension mechanism, specify a vocabulary name and reference using the attributes, or simply use this as a free string field.