# Appendix D: Background/Supplementary Documentation (non-normative)

This appendix supplies background/supplementary documentation from working groups and task forces for interested readers, including but not limited to object plans, business/use cases, test plans, test results, background and best practice documentation. Last modified dates are included in parentheses.

- PESCJSON.pdf (3/8/2021)
- OpenAPI.zip (11/16/2021)
- SIF 3.3 XSD Changes.pdf (8/7/2019)
- scripts.zip (11/16/2021)
- Infrastructure3.3Delta.pdf (8/7/2019)