DDSXTY — Definition of built-in IDL annotation @Shared is missing

The Type System defines a type member attribute shared, which indicates that a member should be stored by reference instead of by value to enable the use of external stores—for example, for large data members. This attribute appears in the TypeObject IDL definitions as a built-in annotation @Shared. However, this built-in annotation is never formally defined. (Possibly, it was deleted accidentally in a previous revision of the specification document.)
Resolution:
Add a section defining this built-in annotation to section 7.3.1.3, Built-in Annotations.

Add a section defining this built-in annotation to section 7.3.1.3, Built-in Annotations.
Issue 15707, Improve support for shared data, needs to update the description of this new section. The FTF should not create the section in this issue only to modify it in that one. Rather, we should merge this issue with that one and make the entire change in one place.
Revised Text:
See issue 15707.
Disposition: Merged with issue 15707