From the webpage:
OpenSearch is a collection of simple formats for the sharing of search results.
I like this line from the FAQ:
Different types of content require different types of search engines. The best search engine for a particular type of content is frequently the search engine written by the people that know the content the best.
Not a lot of people using the OpenSearch description document but I wonder if you could write something similar for websites? That is declare for a website ((your own or someone else’s), what is to be found there. Or what vocabulary is used there.
With just a small boost from their users, search engines could do a lot better in terms of producing sane results.
Will have to think about a way to test the declaration of a vocabulary for a website or even group of websites and comparing that to a search without the benefit of such a vocabulary. Suggestions welcome!