P1-REQ-13-4-008

Return to Part 1 Requirements

A Data Structure Instance SHALL identify a populated occurrence of a Data Structure Definition.

Part 1, Section 13.4: Core Conceptual Element Requirements.

A Data Structure Instance represents a populated occurrence of a Data Structure Definition. This distinction separates the definition of a class of information from a specific occurrence of information that conforms to that definition.

This requirement supports traceability between definitions and instances and prevents a populated occurrence from redefining the information class.

This requirement applies to Data Structure Instance references within the Conceptual Architecture.

It applies specifically to:

• Populated information occurrences
• Definition-to-instance relationships
• Instance interpretation
• Information traceability
• Data Structure Instance descriptions

Verification SHALL confirm that each Data Structure Instance identifies a populated occurrence of a Data Structure Definition.

Verification activities include review checks confirming that:

• Data Structure Instances identify populated occurrences
• Each Data Structure Instance relates to a Data Structure Definition
• Data Structure Instances do not redefine Data Structure Definitions
• Instance references remain distinct from definition references

Related source section:

• 13.4 Core Conceptual Element Requirements

Related requirement identifiers:

• P1-REQ-13-4-001
• P1-REQ-13-4-007
• P1-REQ-13-4-012

Draft