1. OpenSearch Dr. Harry Chen CMSC 491S/691S March 12, 2008

3. OpenSearch at a9.com

4. OpenSearch in Firefox

6. Typical OpenSearch Model OpenSearch Client OpenSearch Services

7. Communication OpenSearch Client (e.g., a9.com) OpenSearch Services (e.g., IMDB) Query string (plain text) Search results (HTML) HTTP GET request http://foo.com/os?q=stuff HTTP Response RSS/Atom (XML) You

9. Key Features Autodiscovery Search Result Description Search URL Template Service Description OpenSearch

15. An Yahoo! example Place your search query here. (e.g., java) Where you want the index to start for the matching search results (e.g., 1)

19. Result in RSS 2.0 Atom vocab. is used to “point to” the service description URL

20. Result in Atom

22. In HTML Pages http://www.opensearch.org/Specifications/OpenSearch/1.1

23. In RSS feeds http://www.opensearch.org/Specifications/OpenSearch/1.1

24. An Autodiscovery Example In Firefox, whenever you see a “blueish” icon means an OpenSearch service is discovered. http://en.wikipedia.org/wiki/Opensearch

25. How Wikipedia Implements OpenSearch http://en.wikipeida.org  view source Service Description Doc http://en.wikipedia.org/w/opensearch_desc.php

27. What’s this? a different URL for getting search term suggestions!