I haven't looked too far for prior art in this area but the youtube api does have an approach to formatting error response bodies:
http://code.google.com/apis/youtube/developers_guide_protocol.html#Error_responses An invalid_format Error - This code indicates that an XML element's value does not match an expected format. For example, you could receive this error if you specify invalid coordinates in the <gml:pos> tag. <?xml version='1.0' encoding='UTF-8'?> <errors> <error> <domain>yt:validation</domain> <code>invalid_format</code> <location type='xpath'>georss:where/gml:point/gml:pos/text()</location> </error> </errors> There is one issue, I think with the domain element, as in this example, it's specific to google data services and not global, but you get the basic idea. davep On Sat, Jul 12, 2008 at 11:06 AM, Sergio Bossa <[EMAIL PROTECTED]> wrote: > Just to be clear: when I say "user feedback", I mean both feedback > provided to users acting as clients of an Abdera server, and also > feedback provided to users implementing an Abdera server. > > Cheers, > > Sergio B. > > -- > Sergio Bossa > Software Passionate, Java Technologies Specialist and Open Source Enthusiast. > Blog : http://sbtourist.blogspot.com > Sourcesense - making sense of Open Source : http://www.sourcesense.com > Pro-netics s.p.a. : http://www.pronetics.it >