Search code examples
fix-protocol

What is OptimisedImplicitBlockRepeating component type in FIX?

According to FIX specification there are only two FIX components of OptimisedImplicitBlockRepeating type:

  • InstrmtLegGrp
  • UndInstrmtGrp

However, this type doesn't seem to be documented anywhere. What's the difference between OptimisedImplicitBlockRepeating and normal ImplicitBlockRepeating?

Solution

  • According to the author of this concept it means that FIXML representation of such tags eliminates component nesting. For example instead of <Leg><Leg ....></Leg></Leg> elements are inlined into <Leg ..../>.