Hi, this is a repost of a question not correctly answered -- sorry about that.
We are looking for a reasonably priced CMS , with source code, in which we can ditch the portal system. There are notorious examples of something similar which are way too expensive: Methode, Broadvision, Microsoft CMS.
There are a lot of systems in which the portal part is too tightly coupled with the backend to do that. Basically Joomla, Drupal, phpNuke, dotNetNuke, Umbraco are all examples of what we don't want.
We want a back office system that can store heterogeneous information with versioning, workflow and so on. This information should be statically publishable (to files, xml, etc...). Also we would like to have a set of APIs for accessing the information in a custom front-end.
We would use this system in a large number of websites. Platform is not important as we develop sites on multiple stacks.
Thank you in advance