Query Parameter optional in Scopus API

Question

https://nonprod-devportal.elsevier.com/documentation/AbstractCitationAPI.wadl
This link is told how to create API url. I’ve problems with Query Parameters.

citation xsd:string Allows for the exclusion
options: of self-citations.
exclude-self, The default behavior
exclude-books is to include all citations.

I don’t know understand this one. How to create url api with this?

Answer 1

Base URL: https://api.elsevier.com/content/abstract/citation?
Parameters:

exclude-self=true to exclude self-citations.
exclude-books=true to exclude citations from books.
Combine these parameters with "&" to create the complete URL:

Answer 2

https://api.elsevier.com/content/abstract/citation?