How to use.library files

How are the .library files used for the RF Passive SMT Library intended to be used? 

The files are located in my ADS 2017 installation at %HPEESOF_DIR%\ComponentLibs\models\

These files are referenced in the ADS 2017 help at qthelp://ads.2017/doc/vcrfs/Vendor_Component_Libraries_-_RF_Passive_SMT_Library.html

I am familiar with the process for using Unzip Design Kit for *.7z files and Manage Libraries to specify a lib.defs file, but *.library is a format I am unfamiliar with.  The "Procedure to add a Vendor Component Library" subsection in the help is not actually relevant; it only applies to .7z files.