Articles or News Management Systems

Hello List, I'm going to add some kind of articles system into my cms. General aim of this articles system have unlimited branches (or sub categories), each branch may own editors or writers. I'm looking for current imlementations of this kind of systems. Does anyone suggest a system to have good abilities about this issue also I'm looking for any standats about this issue. It seems there where JSR-170 spesification about content reposity. I do not find anything than RFC (which is beyond my understandability). Is there any other documentation (php implementation(it seems there where phpcr.org and I cannot connect it)) And Or is here any suggestion or wish list about this kind of system... Regars Sancar