The new tolog NumbersModule [1] adds support for numbers. Tolog does not sort 
numbers correctly, though. This can be reproduced by using this query:

 import "http://psi.ontopia.net/tolog/numbers/" as numbers
 select $value from
 { numbers:value("6", $value)
 | numbers:value("45", $value)
 | numbers:value("78", $value)
 | numbers:value("123", $value)
 } order by $value?

Tolog returns 123, 45, 6, 78 instead of 6, 45, 78, 123.

This is caused by the RowComparator inner class in QueryProcessor. The code 
applies ORDER_OBJECT sorting for multi-typed signature arguments, which means 
ObjectUtils.toString(value) for non TMObjectIF objects. The NumbersModule uses 
'n' as signature, which returns two types [2]: Integer and Float. This results 
in numbers being sorted by their String equivalent, which explains the 
erroneous behaviour.

To fix this issue, check if multi-typed signatures hold only Numbers subclasses 
and, if so, apply a separate sorting algorithm on these numbers.

[1]: http://code.google.com/p/ontopia/source/detail?r=2182
[2]: 
http://code.google.com/p/ontopia/source/browse/trunk/ontopia-engine/src/main/jav
a/net/ontopia/topicmaps/impl/utils/ArgumentValidator.java?r=2126#100