Hi Alex,
The items you see in that list are queries of various kinds. You can see these as bookmarks of useful queries.
You can right click on the property and using "Utilities / Browse the method implementing the navigation" will get you to the method that implements that navigation.
For example:
FAMIXNamespace>>clientTypes
<MSEProperty: #clientTypes type: #FAMIXType> <multivalued> <derived>
<MSEComment: 'All types that depend on the receiver'>
^ self queryAllIncomingAssociations atTypeScope withoutSelfLoops
So, you will get all classes that use something from the current namespace.
Cheers,
Doru