The OpenId example currently uses "http://schema.openid.net/contact/email" and "http://schema.openid.net/namePerson/friendly" as "attribute exchange" attribute types in the wiring file. The "http://schema.openid.net" attribute schema is now out-dated, and "http://axschema.org/" should be used in its place; see http://www.axschema.org/ for details.
It is worth noting that http://openid.net/specs/openid-attribute-exchange-1_0.html uses "AX" names and references "http://www.axschema.org/" as the preferred schema. FWIW, Google supports both the old and new schemas, but Yahoo only supports the new one. I haven't tried other providers.