How to create UI5 Applications for SAP Business One using SAP Web IDE

1. We are trying to use SAP Web IDE (WIDE) to develop UI5 applications. The back end is SAP Business One (B1). Currently B1 provides a service layer (B1SL) with which ODATA syntax can be used. However B1SL is not integrated with WIDE.
2. How can I retrieve the B1SL metadata.xml into WIDE? WIDE uses xml views, which depend on the associations and navigation properties defined in this metadata.xml.
3. What is the best way then to manually call B1SL, and manually form MVC models within WIDE? Should these calls be created within component.js?

Thanks.

Chong Chin