is authored by - an author is an agent who gave existence to the content; who of them will actually present it may not be known
Publish metadata about a presentation, including title, start and end time, authors, presenter, event, location, and optionally a link to the slides or a recording. Authors and presenter are separate: a programme normally lists the authors of a talk, while who of them actually speaks is often only known later, so the presenter is optional and both are repeatable.
Publishing information about a presentation
abstract or description of the presentation
location of the presentation (name or URI)
URL to slides, recording, or related resource