Minor changes on Section 9.2.3

For better readability:

• From "An application interface represents a point of access where application services are made available to a user, another application component, or a node." to "An application interface represents a point of access where application services offered by an application internal active structure element can be accessed."
• From "...specifies how the functionality of a component can be accessed..." to "...specifies how the functionality of an application internal active structure element can be accessed ..."
• From "...specifies a contract that a component making this interface available must fulfill" to "...specifies a contract that an application internal active structure element making this interface available must fulfill"
• From "An application interface may be part of an application component through composition, which means that these interfaces are provided by that component and can serve other application components." to "An application interface may be part of an application internal active structure element through composition, which means that the interface is provided by that element and can serve other internal core active structure and behavior elements."
• From "An application interface can be assigned to application services, which means that the interface exposes these services to the environment." to "An application interface can be assigned to application services, to expose those services to the environment."