[This message was posted by Mahesh Kumaraguru of <[email protected]> to the "General Q/A" discussion forum at http://fixprotocol.org/discuss/22. You can reply to it on-line at http://fixprotocol.org/discuss/read/6ef0594e - PLEASE DO NOT REPLY BY MAIL.]
Check the release notes / appendix of the specs to see differences between versions. In FIX repository, there is a "TOOLS AND SAMPLES" described as "Compare FIX Messages between versions (Sample Application.zip, 14KB) A simple XSLT that compares the Tags that make up each message in FIX to the Tags that make up the same message in another version. The results are displayed as a basic HTML document". This XSLT tool is available at http://fixprotocol.org/documents/874/Sample%20Application.zip (You need to be logged in to access the above zip. ) There are substantial differences in Session between FIX.4.0 / 4.1 / 4.2 after which the next change in Session is at FIXT.1.1. FIX.5.0 onwards use FIXT.1.1 FAST is a multicast session protocol for market data. Work is underway to compress any XML / FIXML data over a FAST Session but FAST is not being used for Order / Execution workflows. You are right that implementating a FIX engine from scratch will teach you a lot about the "wire level protocol". Best of luck in your learning. What technology do you want to use for coding ? > Hi, I'm fairly new to FIX. I've used APIs which hide much of the > protocol, but haven't done much with the wire level protocol itself. > > Mainly as a learning exercise, I'd like to implement a simple FIX > engine (although I know QuickFix/J is available as a free and > production level engine). > > I've printed out the 4.2 spec, but am overwhelmed at the idea of going > through all the version. > > Are there any documents which simply list the differences between > the versions? > > Am I basically correct in assuming that the session level protocol is > the same for all versions and that the changes are limited to > application level messages? > > I'm a little confused about the relationship between version 5 and the > FAST protocol. Does 5 use FAST or is FAST simply a session level > protocol and all versions (the application level parts) can be made to > sit on top of FAST? > > Thanks [You can unsubscribe from this discussion group by sending a message to mailto:[email protected]] --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Financial Information eXchange" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/FIX-Protocol?hl=en -~----------~----~----~----~------~----~------~--~---
