We are making an application which is for 95% within Tridion itself through GUI Extensions. The 5% that are stored external would need to be viewable and editable from within the CME. We were thinking that creating our own Data Models could help make this possible.
Unfortunately it is hard to find documentation about this. The Documentation on SDLLiveContent is rather limited and finding examples has left us with a unfruitful result. Is there more in-depth documentation/examples about the capabilities of Data models available than those found on SDLLive?
(I already have taken a look at the ItemType Extending tutorial of UIBreadCore)
Besides the answers below I would still love to get my hands on some documentation about Data Models as that was my core question.