How to mark up an author with their pen name / pseudonym in Docbook 5?

Question

Should I simply use another author element / tag with the role attribute set to "pseudonym"?

Answer 1

Actually, it fully depends on a processing logic you are going to implement and how exactly you want to work with the pseudonym metadata.

You may consider using an othername or a personname instead as a part of an author block. Probably it would be more flexible in many ways.