else if (name.equals (Literals.ISCOLLECTION))
result = new IsCollectionExpression (e, getRequestedResourcePool());
else if (name.equals (Literals.NOT_ISCOLLECTION))
result = new NotIsCollectionExpression (e, getRequestedResourcePool());
else if (name.equals (Literals.ISDEFINED))
result = new IsDefinedExpression (e, getRequestedResourcePool());
else if (name.equals (Literals.NOT_ISDEFINED))