The following are examples of cross-instance references in an OSCAL SSP. Cross InstanceĪ cross-instance scoped identifier reference is used to reference information imported from another OSCAL instance. This scenario supports enforcement of constraints since all of the information required to check the validity of the reference is readily available in the SSP. InstanceĪn instance scoped identifier reference is used to reference information in the same OSCAL SSP instance. The following summarizes the scenarios where an OSCAL SSP may have references to other content. Identifier ReferencesĪn OSCAL SSP may contain references to information that is instance scoped (e.g., in the SSP model), cross-instance scoped (e.g., in a referenced profile, catalog, or component definition model), or external (e.g., references to non-OSCAL resources). This enables tools to know the content within the two formats is equivalent. When converting between formats, such as XML to JSON, these values should remain the same. This document level UUID is the only UUID in OSCAL associated with version control. These are two mechanisms by which tools can quickly "know" if a file has changed since it was last encountered.
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