Types NumInGroup and NumInGrp in Fields.xml of FIX Repository for FIX.5.0SP2

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Imported from previous forum

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In Fields.xml of FIX Repository for FIX.5.0SP2, I see two types NumInGroup and NumInGrp, but FIX.4.3 upto FIX.5.0SP1 I see only NumInGroup. Also in Datatypes.xml I see only NumInGroup. Is NumInGrp a typographic error and do these both types NumInGroup and NumInGrp mean the same ?