[boost] validating explicit-failures-markup.xml?

The comment at the top of explicit-failures-markup implies the following command should work, but it doesn't for me. What am I missing? $ xmllint --valid explicit-failures-markup.xml --schema explicit-failures.xsd explicit-failures-markup.xml:3: validity error : Validation failed: no DTD found ! xsi:noNamespaceSchemaLocation="explicit-failures.xsd"> ^ ... -- Dave Abrahams Boost Consulting http://boost-consulting.com