IfcInteger is a defined type of simple data type Integer. It is required since a select type (IfcSimpleValue) cannot include directly simple types in its select list.
In principle, the domain of IfcInteger (being an Integer) is all integer numbers. Here the number of bits used for the IfcInteger representation is unconstrained, but in practice it is implementation specific.
HISTORY New type in IFC1.5.1.
TYPE IfcInteger = INTEGER;
References: IfcTask IfcRelConnectsPathElements IfcStairFlight IfcReference IfcRecurrencePattern IfcTriangulatedFaceSet IfcTriangulatedIrregularNetwork IfcBSplineCurve IfcBSplineCurveWithKnots IfcBSplineSurface IfcBSplineSurfaceWithKnots IfcCompositeCurve IfcMaterialLayer IfcMaterialProfile IfcSimpleValue IfcPixelTexture IfcEdgeLoop IfcTable