Introduction to YQL - Talk at HackU 2010, IIT Chennai
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YQL (Yahoo Query Language) provides a SQL-like language for accessing and manipulating data from diverse web sources. It allows developers to unify access to thousands of web services and data sources through a simple and familiar interface. YQL expressions can retrieve, filter, combine and transform data from any structured data source on the web or web services. This simplifies and standardizes data access for developers compared to reading documentation and constructing specific API calls for each source.
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Introduction to YQL - Talk at HackU 2010, IIT Chennai
- 2. select * from internet; Balaji Narayanan @balajijegan http://balajin.net/blog/
- 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
- 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
- 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
- 32. YQL Hosted Storage for Storing Secrets, Environment Files, Open Data Tables
- 33. insert into yql.storage.admin (name,url) values ('fireeagle','http://balajin.net/hacks/fireeagle.env')
- 34. < execute > store://balajin.net/fireeagle </execute> < select > store://RtdcPRPDsp0d8WyyLSDo3T </select> < update > store://hyOKm0GnP802H2hPzMARZ1 </update>
- 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