Source-derived document; reported behaviour, inference and evidence gaps are identified in the text.

Component cooperation

Subjects and elements	Diagram	Sources
D4_Cust; D4_Orders; D4_Stock; D4_Report; D4_Globals; stores7 database	Diagram; 1 recorded gaps	E0001, E0002
Main Menu Interface; Customer Form Layer; Order Form Layer; Order API; Stock API; Report API; Generated Record Model; Documented Transaction Boundary; State Selection Form	No diagram; 3 recorded gaps	E0004, E0005, E0006
Main navigation; Customer management; Customer data; State lookup; Order entry; Order data; Stock management; Stock data; Reports	Diagram; 1 recorded gaps	E0007
Main menu; Customer management; Customer query; State selection; Order management; Order entry; Customer and order forms; Order browsing; Privileged order browsing; stores7 database; D4 customer target	Diagram; 1 recorded gaps	E0009, E0010
D4_Main; D4_Globals; D4_Orders; D4_Cust; D4_Stock; D4_Report; Informix Database; Report Framework; Order Records; Stock Records	Diagram; 2 recorded gaps	E0011, E0012, E0013
D4_Main; D4_Cust; D4_Orders; D4_Stock; D4_Report; D4_Globals; stores7 database	Diagram; 2 recorded gaps	E0001, E0002, E0007
D4_Orders; D4_Cust; D4_Stock; D4_Report; D4_Globals; order_form; stores7 database	Diagram; 1 recorded gaps	E0001, E0002, E0006, E0007, E0008
D4_Main; D4_Stock; D4_Globals; D4_Orders; Stock records	Diagram	E0001, E0002, E0007
D4_Main; D4_Report; D4_Globals; D4_Cust; D4_Orders; Database access	Diagram; 1 recorded gaps	E0001, E0002, E0004

Harten documentation of the Informix 4GL and Java source repository, from the retained 17 October 2026 export. The exact upstream revision analysed is not established. Source findings do not establish runtime behaviour or equivalence between the implementations.

Evidence identifiers are retained for traceability. The underlying analysis records are not included in this public edition; credential values are redacted. About this case study.