OData services are often described as read APIs for the UI. What is wrong with that picture?

What is OData, and which technologies is it built on?

Where in the metadata document are the service's entity sets defined, and how do they relate to the service document?

What do the two ends of an OData association declare?

How is the trusted RFC from Gateway to the Business Suite configured?

Where do SAP Gateway administration rights come from?

What are the four subconstraints of REST's uniform interface?