My OS (Ubuntu 11.04) uses Dutch localization. When compiling Ontopia with Maven 
the test cases of NumbersModuleTest fail, because it expects the results to be 
in a different locale. This is the fail message:

Failed tests: 
testNumbersValueClosedPattern(net.ontopia.topicmaps.query.core.NumbersModuleTest
): null
testNumbersValueOpenPattern(net.ontopia.topicmaps.query.core.NumbersModuleTest):
 match not found in expected results: {result=1.234} => [{result=1234567.9}]
testNumbersFormatClosedPattern(net.ontopia.topicmaps.query.core.NumbersModuleTes
t): null
testNumbersFormatOpenPattern(net.ontopia.topicmaps.query.core.NumbersModuleTest)
: match not found in expected results: {result=1.234,00} => [{result=1,234.00}]