I can't speak for Reuters, but I have worked with two generations of Bloomberg data. One was a trading backfeed over TCP/IP that was pretty complicated to implement. For example, whenever my side crashed or exited, I had to call the NY contact to restart his server end. That was a pretty tricky, but once up it was quite steady. And it was attached to a very critical trading system.
The second was a very rich set of all manner of indicative data--a superset of what you would imagine is behind the Terminal itself. This seemed to me to be a very cleanly specified and implemented system. And it was quite feature rich.
I am not clear on what relationship this has with their current offering.
The first one sounds like some kind of custom FIX feed. That would be unrelated. The latter is essentially what was released today. The request/response mode is used for the indicative/historical retrieval and subscriptions are used for the realtime data.
The second was a very rich set of all manner of indicative data--a superset of what you would imagine is behind the Terminal itself. This seemed to me to be a very cleanly specified and implemented system. And it was quite feature rich.
I am not clear on what relationship this has with their current offering.