The document discusses augmenting web services with SMS and XMPP channels. It provides an overview of SMS and XMPP, describes an Extapi framework for adding new channels and services, and gives examples of adding SMS and XMPP channels to a transit tracking service to provide arrival information with lower user attention requirements compared to traditional web and mobile access.

4. Motivation Laziness

8. SMS Downside

11. Why XMPP It makes SMS look like:

14. Architecture Goal Web Service X HTTP Users

15. Architecture Goal Web Service X XMPP SMS Channel N HTTP Users

16. Architecture Channels SMS XMPP Services Trimet Twitter Service X Channel X Extapi App Server Clients HTTP

17. Architecture Channels SMS XMPP Services Trimet Twitter Service X Channel X Clients HTTP

18. Extapi Structure MVC Container Aabot App Static Vendor Extapi Built in the style of a Vendor plugin. Currently within the Aabot MVC container. Can also be adapted for containers such as CakePHP Channels Services

21. SMS Shortcode SharesFREE! There are concessions to be made for all the “Freeness”

25. Shortcode Share Architecture Extapi (or any web app) mobile carrier Users Short Code Share HTTP HTTP

27. Dotgo <?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?><cmrl xmlns:dotgo=&quot; http://dotgo.com/cmrl/1.0 &quot;> <match pattern=&quot;*&quot;> <engine href=&quot; http://example.com/servic e.php &quot;/> OR <message> <content>Hello world!</content> </message> </match></cmrl>

29. Example XMPP Channel Architecture Users Extapi XMPP Server (Openfire) X2Http Plugin HTTP XMPP

30. X2Http Openfire plugin

31. Example: TransitTracker ® Currently offers web access, WAP, and IVR These all require the user to be highly engaged with the service

33. Trimet over SMS

34. Trimet over XMPP

35. Yes It Is Alpha code

37. Extapi: Base Class for a channel Extapi Channels class Extapi_Channel_Base /** * @return boolean */ public function have_required_request_params() /** * @return boolean */public abstract function authenticate_request();

38. Extapi: Base Class for a Service Extapi Service class Extapi_Service_Base public abstract function parse_request_statement();public abstract function act_on_request_statement();public abstract function gather_feedback();