xmlns:metal, xmlns:tal are needed by Zope to execute the PageTemplate correctly.
xmlns:i18n and i18n:domain are still required in some parts of Launchpad were we still plan to support multiple languages (Answers for example).
xmlns:metal, xmlns:tal are needed by Zope to execute the PageTemplate correctly.
xmlns:i18n and i18n:domain are still required in some parts of Launchpad were we still plan to support multiple languages (Answers for example).