I was using the online reference for reviewing interfaces and found some very minor issues. The final document needs to be run through a spell checker.

These are all very low priority.

Section 4.9.2
1) "Rules for the defintion of Interfaces:"
"defintion" is mispelled and should be "definition"

2) "If several Interfaces should be applied to the Object, they should be treated as if they where all applied to the ObjectType of the Object at the same time. If this is not possible, the Interfaces cannot be applied to the Object together."
"where" should be "were"

Section 4.9.1 Overview
3) The following sentence is clumsy - it starts with what should not be done instead of what should be done.
"In general, good object-oriented design is accomplished by not over-using inheritance but instead by using composition to aggregate an object providing several functionalities [GH95, FF04]."

Suggest this:
"In general, good object-oriented design is accomplished by using composition to aggregate an object which provides several functionalities instead of over-using inheritance [GH95, FF04]."

4) 7.19 HasInterface ReferenceType
One SourceNode can refer to different Interfaces.

Suggest replacing different with multiple or more than one interface

5) 7.20 HasAddIn ReferenceType
Suggest adding a statement similar to 7.19

"One SourceNode can refer to multiple add-ins."

If this is not valid then the spec should explain why.

6) 8.2.11 InterfaceTypes
"The intention of the “InterfaceTypes” Object is that all Interfaces of the Server are either directly or indirectly accessible browsing HierarchicalReferences starting from this Node."

add the word "by" so that it reads
"The intention of the “InterfaceTypes” Object is that all Interfaces of the Server are either directly or indirectly accessible by browsing HierarchicalReferences starting from this Node."