Hello,
According to to the Atlassian website you can, in Confluence:
"Create libraries of content – standard images, copyright statements, glossary items – for re-use across pages and spaces."
http://www.atlassian.com/software/confluence/overview/technical-writers
Does this simply mean that you can create pages containting content that is used by the Excerpt or Multi-Excerpt plugins?
I've had a look in the user guide but can't see anything on this subject.
Cheers.