Customizing Assert Error Messages
To customize the error messages that the Xerces or Saxon validation engines display for the
<assert>
and <assertion>
elements, set the
@message
attribute on these elements.- For Xerces, the
@message
attribute has to belong to thehttp://xerces.apache.org
namespace. - For Saxon, the
@message
attribute has to belong to thehttp://saxon.sf.net/
namespace.
@message
attribute is the error message displayed if
the assertion fails.