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Design an XML-based protocol

 
Greenhorn
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Hi all,
I'm a developer for a market data redistributor in France. I'm doing research for a project that is to provide our customers with market data (quotes, history, order books, news, etc.) using an XML-based protocol. The data is provided by our backend on which the "XML server" would interface.
That server would also be used internally by our trade applications.
Our concern is to come up with a protocol that would be easy to integrate into specific customer client applications. The best way to do this would be to implement a standard, but they seem either too large (FIX) or unfinished (MDML).
On the other hand, we would like to keep it simple to
minimize the work on our internal client applications. That would lead us to design our own protocol. We could provide our customers later with an API on it.
Which direction (standard or custom protocol) would you recommend ?
Thanks
 
Greenhorn
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You may like to consider Web Service option for this.
 
Laurent Raynal
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Thanks.
Our problem is that we don't want to limit the protocol to HTTP. For a few customers, we would like to set up a socket connection and use a faster protocol to deliver large amounts of data.
 
It is sorta covered in the JavaRanch Style Guide.
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