> For the complete documentation index, see [llms.txt](https://docs.bis.org/ellipse/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bis.org/ellipse/proof-of-concept.md).

# Ellipse Phase 1:  Proof of Concept

- [Two Jurisdictions, One Common Data Model](https://docs.bis.org/ellipse/proof-of-concept/two-jurisdictions-one-common-data-model.md)
- [Cross-Border Data Model using Retail Mortgage Loans](https://docs.bis.org/ellipse/proof-of-concept/cross-border-data-model-using-mortgage-loans.md)
- [Data Components for Retail Mortgages](https://docs.bis.org/ellipse/proof-of-concept/data-components-for-retail-mortgages.md)
- [Data Attributes](https://docs.bis.org/ellipse/proof-of-concept/data-attributes-and-definitions.md)
- [Data Definitions](https://docs.bis.org/ellipse/proof-of-concept/data-definitions.md)
- [Using the Common Domain Model (CDM)](https://docs.bis.org/ellipse/proof-of-concept/modelling-ellipse-using-the-common-domain-model-cdm.md)
- [Normalising Common Components](https://docs.bis.org/ellipse/proof-of-concept/normalising-common-components.md)
- [CDM Mortgage JSON](https://docs.bis.org/ellipse/proof-of-concept/cdm-mortgage-json.md)
- [Programmable Reporting Logic and Machine Executable Reports](https://docs.bis.org/ellipse/proof-of-concept/programmable-reporting-logic-and-machine-executable-reports.md)
- [VIDEO: Demonstration of the Mortgage CDM](https://docs.bis.org/ellipse/proof-of-concept/demonstration-of-the-mortgage-cdm.md)
- [Our Findings](https://docs.bis.org/ellipse/proof-of-concept/ellipse-mortgage-cdm-demostration.md)
- [Next Steps](https://docs.bis.org/ellipse/proof-of-concept/next-steps.md)