In my last post Search Your Internal Site From Internet Explorer I talked about how to expose a search to your site so that it will light up the Internet Explorer Search Box. I referred to OpenSearch. The site refers to an XML schema spec, but does not provide a schema.
XML is one of my weekend hobbies, and XML schemas are one of the best intersections between linguistics and programming.
For those of you using XML editors and want to validate that your Search Provider file is using the correct schema, or want intellisense, I put together the above XSD schema.