ODA based project need some info

Before I begin, only REAL freelancers with REAL talent can post that understand the milestones of freelancer.com, I will only pay each milestone as and when they are completed if they fail to be completed to a satisfactory standing I will not payout on that milestone. No lets begin, this specific project is relating to the Open Document Architecture or ODA, I am part of huge team developing an incredibly complex system, however as part of this system some features require documents other then ODT get converted to ODT, we already have the hardware and software to do that. Once converted this is where it gets sticky, we need more understanding of the ODA specifically how we can open, view and edit them programatically in any language, we know that the ODA is a zip file containing XML like structure but that is about all we know. This job is simply explaining the ODA and how a program can utilize it to create, read, update and save documents within the ODA based architecture, all programatically, of course a user inteface will be developed there after testing. A report will need to be produced after the conversation which details everything there is about ODA and all file formats associated with it. I hope you all understand and will look forward to your replies.