@outputclass is not available on <prolog> and <topicmeta>. I think is a place where LwDITA is still aligned with DITA 1.3. Let’s fix this. Best, Kris Kristen James Eberlein Chair, OASIS DITA Technical Committee Owner, Eberlein Consulting LLC
kris@eberleinconsulting.com Skype: kriseberlein; voice: +1 (919) 622-1501