This doc's example http://docs.jboss.org/arquillian/reference/latest/en-US/html_single/#containers.configuration
refers to http://jboss.org/schema/arquillian/arquillian_1_0.xsd
However there's only http://jboss.org/schema/arquillian/arquillian_1.0.xsd
I suggest to rename to http://jboss.org/schema/arquillian/arquillian_1_0.xsd
since it's the usual form, see e.g. http://www.jboss.org/schema/jbossas/

(20:01:57) OndejZizka: Usual is _
(20:01:59) OndejZizka: http://www.jboss.org/schema/jbossas/
(20:02:26) aslak: yea, _ is used in spec xsds as well
(20:02:37) aslak: need a new namespace as well