multiple authors or contributors in schema.org

Question

If one looks at the Movie type in schema.org, both actor and actors properties are allowed (actor supersedes actors). But there is no equivalent for author and contributor properties. In my view, a News Article for example, can often can have multiple authors and/or contributors.

The orderedItem property in Order allows for a single OrderItem/Product, or a collection of OrderItems/Products. Can we do the same with the author and contributor properties, ie. save multiple entities in a collection?

Answer 1

You can add a property multiple times.

For example, a Movie could have two actors:

<article typeof="schema:Movie">
  <ul>
    <li property="schema:actor" typeof="schema:Person">…</li>
    <li property="schema:actor" typeof="schema:Person">…</li>
  </ul>      
</article>

Or a Person could have two names.