else if (item instanceof IExpression)
lookingFor = (IExpression) item;
final RuleList results = new RuleList();
for (int i = 0; i < list.getItems().size(); i++) {
if (list.getItems().get(i).equals(lookingFor))
results.addItem(new Constant(BuiltinHelper
.createXSLiteral(i, "integer"), results));
}
return results;
}
return null;