[This message was posted by Dimitry London of Morgan Stanley <[EMAIL PROTECTED]> to the "FAST Protocol" discussion forum at http://fixprotocol.org/discuss/46. You can reply to it on-line at http://fixprotocol.org/discuss/read/e1ba0d30 - PLEASE DO NOT REPLY BY MAIL.]
Thanks, David. Let me clarify what I meant with a specific example. In case of Market Data Level2 a price for a given level may be deleted - so the price no longer exists. This is different from FAST NULL value where NULL means an absence of a field in a stream instead of the field itself being deleted. For Market Data Level2, FIX allows to use "Delete" action. However, I was looking for a general way to specify a deleted field (which is somewhat equivalent to the field being NULL in a database world). Dimitry > Not sure what you mean by deleted. Do you mean that the field was there > in one version of the template but not in anotherone? Or do you mean > that the value of the field is not there anymore in a particular stream? > Or do you mean something else? > > If it is the value that is not there anymore, you should mark the field > as having optional presence in the template and then you encode NULL > when you don't have a value. > > If the field is not in the template anymore, then there is no formal way > of expressing it (other than leaving it out obviously) and you have to > convey this fact by other means. > > /David > > > > > Hi, > > > > suppose I want to encode a particular field as "deleted", what would > > be the standard(generic) FAST way to achieve it? > > > > Thanks, Dimitry [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 -~----------~----~----~----~------~----~------~--~---
