Re: [Quickfix-developers] order of tags

[Dave L. <dav...@ma...>]

Hi Alvin,

As far as I understand, the default ordering of tags is numeric, i.e. lowest
tag number first and highest last. The header and trailer are slightly
different, in that the header must start with tag 8, 9 and 35, and the
trailer must end with tag 10, but otherwise tags are ordered numerically.

With repeating groups order is more important and hence there is a
constructor that allows you to specify a message order, e.g.:

    Group( int field, int delim, const int order[] )

...where order[] specifies the tag sort order.

The ordering seems to be implemented in FieldMap, a base class used for the
various message parts.

Oren, Are there any thoughts on providing a similar constructor in the
message class?

Dave


On 6/12/05 5:31 am, "Alvin Wang" <AW...@FF...> wrote:

> Hi 
> 
> I wonder how the order of tags in a message is determined. It seems that it is
> not the same order that code sets the tags. If that is the case, how can I
> guarantee that all the tags belong to the same component block (such as
> Instrument component block) are put together in a message?
> 
> Thanks 
> 
> Alvin **********************************************************************
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