Comment
Above in this comment thread:
Open Source Portal Servers Written in Java » Content Management Systems
This site conforms to the following standards:
I do agree, its a bit fuzzy what distinguishes a portal server from a content management system.
I simply picked the packages that used the word "portal" to describe themselves. However, CMSs focus on the entire lifecycle of content creation, while Portals are more of a subset that concentrate on the presentation of different information from disparate data source.
Hope that makes sense!
Carlos