IFC4X4 issues

Hello, found following:

1. Double semicolon appears in current IFC4X4 schema sometimes in such places:
Values : ARRAY [1:SELF\IfcVoxelData.GridSize] OF IfcInteger := IfcListToExpandedArray(ValueData,1,SELF\IfcVoxelData.GridSize,SELF\IfcProduct.Representation.Representations[1].Items[1]\IfcVoxelGrid.Voxels);;
This looks incorrect from the point of view of grammar.

2. Voxels : ARRAY [1:NumberOfVoxelsX*NumberOfVoxelsY*NumberOfVoxelsZ] OF IfcBoolean;
Again, NumberOfVoxelsX (or NumberOfVoxelsY and NumberOfVoxelsZ) are unset, so ARRAY can not be instantiated as upper bound is indeterminate.
Looks like LIST or combination of LIST+ARRAY.

3. CorrectGridSize : SIZEOF(SELF\Voxels) = NumberOfVoxelsX * NVL(NumberOfVoxelsY, NumberOfVoxelsX) * NVL(NumberOfVoxelsZ, NumberOfVoxelsX);

SIZEOF(SELF\Voxels) - doesn't look as qualified_attribute (SELF\entity_ref.attribute_ref), seems should be just SIZEOF(Voxels) as this isn't redeclared (as in other places within schemas).