Quality of oracle docs

Ok, I'll admit I'm a curmudgeon, but then . . .

The 18c Database Release Notes, this is the entirety of Chapter 1:

1 Purpose of These Release Notes

This topic briefly describes the purpose of these release notes.Updates to this document can occur after it is released. Check for updates to this document and view other Oracle documentation at:http://docs.oracle.com/en/database/database.htmlFor licensing information, refer to Oracle Database Licensing Information User Manual. Additional readme or release notes files also exist. Refer to the Other Readmes, Release Notes, or Installation Guides. 

I'm still trying to find where "This topic briefly describes the purpose of these release notes." actually happens. All I see is a statement about getting updates to the document and a statement about getting licensing information.  Nothing about the "purpose of the release notes".