Introduction to YQL - Talk at HackU 2010, IIT Chennai

2. select * from internet; Balaji Narayanan @balajijegan http://balajin.net/blog/

3. Application ?

4. Application = data manipulation data visualization +

5. data

7. var map = new YMap(document.getElementById('map'));…var currentGeoPoint = new YGeoPoint( _c.Lat, _c.Lon ); map.addMarker(currentGeoPoint);… … if (flickcurl_prepare(fc, "flickr.photos.geo.correctLocation", parameters, count)) { … } … http://search.yahooapis.com/ImageSearchService/V1/imageSearch?appid=YahooDemo&query=Corvette&results=2 http://weather.yahooapis.com/forecastrss?p=FRXX0076&u=c ? ? ? ?

8. What is the problem?

9. Thousands of Web Services and sources that provide valuable data

10. Data is isolated

11. Needs filtering, combining, tweaking, shaping even after it gets to the developer.

12. Require Developers to read documentation and form URLs/queries

13. YQL select desc show YQL stmt Bindings http://weather.yahooapis.com/forecastrss?p=FRXX0076&u=c … if (flickcurl_prepare(fc, "flickr.photos.geo.correctLocation", parameters, count)) { … } … http://search.yahooapis.com/ImageSearchService/V1/imageSearch?appid=YahooDemo&query=Corvette&results=2 var map = new YMap(document.getElementById('map'));…var currentGeoPoint = new YGeoPoint( _c.Lat, _c.Lon ); map.addMarker(currentGeoPoint);…

14. Web Service with a SQL Like Language

15. Familiar to developers

16. Synonymous with data access

17. Expressive enough to get the right data

18. Supports query, filter, join and update data across any structured data on the web / web services

19. Demo http://developer.yahoo.com/yql/console

20. XML or JSON output formats. JSON also allows for a callback parameter to use directly as JSON-P

21. Using YQL in your application

24. YQL is not limited to Yahoo! data only

25. use and set

26. Imports the Open Data Table definition

27. Makes it available as tableName

28. Acts just like other YQL Tables

29. Open tables can be collected together into environment files

30. set api_key=“value” on myTable

31. use ‘http://myweb/mytable.xml’ as tableName ; select * from my tableName

36. Insert / Update / Delete

37. Can modify the data on the cloud

38. Open Data Tables

39. Brings the power of table model to new APIs

40. Schema brings mapping between YQL and endpoint

41. Keys can be marked as required

42. YQL compiler validates the existence of required keys

43. < execute > element

44. Extends open data table with server side JS code

45. Move business logic of your application to the cloud

47. More easily build web applications

48. Data processing done away from the app

49. Consistent and familiar syntax for all data access

50. Iterative environment for developing the query

51. data YQL

52. Contribute http://github.com/yql/yql-tables/

53. Questions [email_address]