PersonsList is a Getting Started Application Scenario for SAP HANA Cloud Development.
For the PersonsList sources provided here on SAP Developers Github you get a corresponding end-to-end tutorial on SAP Developers Network (SDN): http://scn.sap.com/docs/DOC-41427 This tutorial offers developers a comprehensive and easy-to-use tutorial for developing a first SAP HANA Cloud Web Application Scenario.
The PersonsList tutorial is the best preparation to continue then with the ESPM (Enterprise Sales & Procurement) references applications scenarios: https://github.com/SAP/cloud-espm-scenarios