Comment by ignoramous

OpenSearch was once was an initiative founded at A9, Amazon subsidiary, to create a personalized, cross-service, search engine: https://archive.is/PCKWq

OpenSearch is from an era when Amazon and Google were covertly competitive. Google didn't get anywhere with Froogle and AppEngine; whilst Alexa and A9 didn't move any mountains.

Code: https://github.com/dewitt/opensearch