[Quickfixj-users] Does QuickFixJ support tag=value syntax or FIXML XML or both???

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Dear Sir

I read through the QuickFixJ web site but could not find information whether
QuickFixJ support tag=value syntax or FIXML XML or both? If this is
configurable feature then how to configure it?

Does anyone have any experience on using QuickFixJ with InteractiveBrokers
FIX interface?

Thank you for your support.

Regards,

JK