1. Copyright OASIS, 2005 / 2007 Slaying the Complexity Monster David Webber Chair OASIS CAM TC drrwebber@acm.org Presentation January 24 th, 2007 Reston VA Toward Agile Information Services

2. Overview  Part 1 – Introduction (10 mins)  Business Information Exchange – was it ever simple?  What are Agile Services and why do we need them?  How does this fit with Service Oriented Architecture (SOA)?  Part 2 – Technology (10 mins)  Introducing OASIS Content Assembly Mechanism (CAM)  Functional capabilities and business benefits  But I have tools that already do all that!?!  Who is using this and why?  Part 3 – Demonstration (30 mins)  Tools overview  Solving agility – Your very own XML example  Value proposition  Call to action/next steps  Q&A (10 min) Copyright OASIS, 2005 / 2007

3. Presentation January 24 th, 2007 Reston VA INTRODUCTION Part 1 Copyright OASIS, 2005 / 2007  Business Information Exchange – was it ever simple?  What are Agile Services and why do we need them?  How does this fit with Service Oriented Architecture (SOA)?

4. Copyright OASIS, 2005 / 2007 What did happen to FAX?  FAX – the ultimate user solution  “Wet-ware” friendly interfacing  Wide disparity in reproduction quality / resolution  Partner “address” = telephone #  Confirmation / Authentication  Cheap hardware + simple plug-n-play use.  1980’s technology – FAX group 3 standard  Now - printable FAX forms + barcodes  OCR scanning + digital imaging  Weakness – double-entry / error checking

5. Enter simple XML – circa 1997  Internet-based technology  Allows flexible and quick definition of content  Human friendly, machine processable  Map arcane EDI formats to self- describing XML layouts  Pervasive standard and tools  Promise: loose-coupling / agility Copyright OASIS, 2005 / 2007

6. Secure web form data-entry  Emergence of xhtml forms, Javascript, XML and REST  Ideal solution for large partners to reach their downstream customers / service providers  OK for single solution partners, but tough on service centers  Weakness – double-entry / training / integration Copyright OASIS, 2005 / 2007

7. Web service APIs + XML  REST or WSDL based  Examples – eBay and Amazon  Sales support + virtual merchants  Weaknesses –  Security  Contextual information content  Agility / versioning  Integration / standards Copyright OASIS, 2005 / 2007

8. XML today – COMPLEXITY!  Use of namespaces, schemas and object models – completely defeats human friendliness / simplicity  Programmer technology only  Intractable to business users  Complexity locks out agility + tight coupling into backend integration code  Brittle interfaces with low fault tolerance = identical issues as with EDI Copyright OASIS, 2005 / 2007

9. Presentation January 24 th, 2007 Reston VA INTRODUCTION Part 1 Copyright OASIS, 2005 / 2007  Business Information Exchange – was it ever simple?  What are Agile Services and why do we need them?  How does this fit with Service Oriented Architecture (SOA)?

10. Copyright OASIS, 2005 / 2007 Agile Services are…  Broad-based across industry domain  Widely supported common functional set  Use open transport interfaces to enable participation from community  Adaptive to local needs through robust extension mechanisms  Consistent with business partner and legal best-practices  Not based on technology lock-in

11. Copyright OASIS, 2005 / 2007 Information Agility Needs?  Simple standards-based common base business process transactions  Common vocabulary across industry  Sparse interchange formats (“SimplEDI”)  Leverage simple XML techniques / tools  Based on open rules methods  Partner Role and Context aware  Built-in versioning support

12. Why is this important?  Creates long-term healthy market-place  Open to complete range of service suppliers  Prevents customer lock-in and legacy dependency  Enables global trade reach  Adaptive to new technology / changing demands / emergency support Copyright OASIS, 2005 / 2007

13. Presentation January 24 th, 2007 Reston VA INTRODUCTION Part 1 Copyright OASIS, 2005 / 2007  Business Information Exchange – was it ever simple?  What are Agile Services and why do we need them?  How does this fit with Service Oriented Architecture (SOA)?

14. Copyright OASIS, 2005 / 2007 Service Oriented Architecture  Loosely coupled, document-oriented interaction model  Provides simple messaging-based interactions. Messages are more self- contained, lack object-oriented complexities and better accommodate asynchronous communications  Registry-centric - need for shared semantics, standards and processing logic  Enabling Context, Role and Intent critical

15. Example Architecture Model Copyright OASIS, 2005 / 2007

16. Presentation January 24 th, 2007 Reston VA TECHNOLOGY Part 2 Copyright OASIS, 2005 / 2007  Introducing OASIS Content Assembly Mechanism (CAM)  Functional capabilities and business benefits  But I have tools that already do all that!?!  Who is using this and why?

17. Copyright OASIS, 2005 / 2007 Copy Resources to runtime area Source Code Management Use Case Files Stylesheets Baseline output Runtime Directory Use Case Files Use Case Files Baseline output Baseline output Use Case Files Stylesheets Baseline output Use Case Files Use Case Files Baseline output Baseline output Schematron, & Template DTD Schematron, & Template DTD

18. Copyright OASIS, 2005 / 2007 Summary of methodology  System architect defines stylesheet modules  Developer is assigned a module.  Developer creates use case files.  Use cases are reviewed  Developer iteratively creates XSLT module  Stylesheet and output files are reviewed  Output is "baselined“

19. Copyright OASIS, 2005 / 2007 Benefits  Scope is defined for developer  Developer demonstrates understanding immediately  Use case files serve as communication tool  Architect does not simply state constraints. Constraints are enforced  Regression test is built during development