In the first paragraph of Chapter 11 (WD-11), there is a sentence "The execution of a step can be performed by one of the functions offered via the interfaces of a Node Template, by invoking operations of a Service Template API, or by invoking other operations being required in the context of a specific service." There are two points confusing me:
1. Interfaces are only defined in NodeType and RelationshipType in the spec, so "via the interfaces of a Node Template" changing to "via the interfaces of a NodeType or a RelationshipType" is a right way.
2. What is the "Service Template API"? There is no definitions in the spec. This really confuses me.