It is used as a reference for the location of other things.

It was used as a reference for later writers of the show.

It is more fun to go to the movie and learn the lines from the people, perhaps using this as a reference.

Below is a list that can be used as a reference.

This page is about the measurement using water as a reference.

This work is being used as a reference by scholars and students.

Often used as a reference in the commercial laptop industry.

This technology used as a reference for many studios still today.

This is a book to be read, used as a reference and consulted often.

The term itself is likely to only be used as a reference to a group of selling points.