1. The CBSO project - Experience and issues Madrid, 05 October 2006 Camille Dümm Pascal Rodrique Central Balance Sheet Office

2. 2 Agenda  CBSO Project  Process  Planning  Communication  Project - Modules  Technical features  Experiences  Issues

3. 3 CBSO Project - Process Taxonomy XBRL Sofista Validator Upload Instance document Software package PDF Database XBRL files

4. 4 CBSO Project - Planning

5. 5 CBSO Project - Communication  Extensive information about the taxonomy is available on the website of XBRL Belgium.  Taxonomy files  Instance documents based on real cases  a user guide  a "viewer" allowing to run over the taxonomy in an efficient and pleasant way  Technical documents  Protocol  New template  Road shows to professionals  Accountants associations  Software vendors

6. 6 CBSO Project – Interaction with Software vendors Why they were involved  Private companies produce 60% of the annual accounts filed electronically  The success of the project depends also from their ability to produce valid instance documents as from April 2007  Software vendors were associated to the project from the beginning How they were involved  Feedback on the taxonomy through the WG  Personal contact to propose a "test service"  Application available in a test environment as from January 2007

7. 7 WG Taxonomy Tests CBSO project - Sofware vendors 03/2005 Taxonomy Draft version Software vendors NBB 01/2006 Taxonomy Final Structure 10/2006 Taxonomy Final version 01/2007 ProductionProduction 01/04/2007 Application developments Application Tests

8. 8 CBSO Project - Modules Publication according to the legal mission  Template published by the NBB based on elements clearly defined in the law Data processed in order to draw up statistics  Data must be validated through arithmetical and logical checks Rendering Module Validation Module

9. 9 CBSO Project - Modules Belgian Gaap  Individual annual accounts are drawn up according to the Belgian Gaap Assistance  Free software used to input the data of annual accounts as alternative to private software  The output is a file compliant with the legal requirements Taxonomy Data Entry Module

10. 10 Taxonomy - Description  be-fr-pfs-ci-2006-10-01  According to Belgian GAAP  Financial Reporting  Primary Financial Statements  Commercial and Industry  Technical assumptions  Compliant spec 2.1 and FRTA  Multilingual  Modular structure

11. 11 Taxonomy - Architecture

12. 12 Taxonomy - Experiences Tools  Taxonomy development - Fujitsu  Taxonomy validation - Fujitsu - DecisionSoft - UBmatrix  Instance document creation - Fujitsu (sample) Conclusions  Generic tools essential considering the complexity of the syntax  The tools are not complete and give different results

13. 13 Data Entry - Features  "On line" application  Allowing a company to fill in the data of its annual account  Allowing upload of an XBRL file build with another application  Validating the data according to technical and legal requirements  Displaying the annual account as it will be published according to the legal template  Creating a valid output file ready to be filed

14. 14 Data Entry - Layout (1)

15. 15 Data Entry - Layout (2)

16. 16 Data Entry - Experiences Complete "In house" development  Tools too generic => need for specific functions  Tuple handling Solution  Most of the sections are automatically generated from the taxonomy  Some specific sections (identifying data or social balance) use "metadata" to be generated  Methodology reused for Rendering module

17. 17 Validation - Features Three levels of validation  XML validation  XBRL validation against taxonomy be-fr-pfs-ci-xxxx  NBB validation containing specific rules but also arithmetical and logical checks Technical specifications published  Software vendors must produce instance documents answering to all specifications  Frequent contacts with software vendors (Feedback about taxonomy, tests sessions, …)

18. 18 Validation - Experiences Module used at two levels  To validate an instance document in the data entry application  To validate an instance document in the filing application "In house" development  Too many specific checks  "Formula" not yet available  To be integrated in an existing process

19. 19 Rendering - Objectives Legal mission  Annual accounts have to be published according to a formal template  Availability as PDF file Objectives  to insert most of the rendering parameters in the taxonomy instead of managing them outside,  to allow multilingualism  to reduce processing time when there is a new taxonomy version.

20. 20 Rendering – Technical structure be-fr-pfs-ci-2006-01-01-presentation.xml 1 XSL Transformation be-fr-pfs-ci-2006-01-01-reference.xml be-fr-pfs-ci-2006-01-01-label.xml 1 XSL Transformation 1 XSL Transformation.../out/presentation.xml.../out/reference.xml.../out/label.xml Company.xml PresentationInstructions.xml 2* XSL Transformation 4 XSL-FO 3 XSL Transformation TransformedCompany.xml Company.pdf Taxonomy linkbases Instance Document To execute at each taxonomy version To produce a PDF file

21. 21 Versioning - Requirements Versioning  First changes with be-fr-pfs-ci-2008-04-01  New taxonomy = New name  Corrections  Legal changes  Use of a Definition linkbase as intermediate table from a version to the next one

22. 22 Versioning - Scenario id 1 id 2 - def 2 id 3 - id 4 id 4.1 id 1 id 2 - def 1 id 3 id 3.1 id 4 - Version n+1 Version n essence-alias similar-item not-present-in Definition linkbase

23. 23 CBSO Project - Issues Urgent needs  Versioning  Formula  Rendering specifications Dangers  In the absence of specifications coming from XBRL International, developers will imagine specific solutions which will go against harmonization

24. 24 Contacts  National Bank of Belgium Central Balance Sheet Office Helpdesk.ba@nbb.be Camille.dumm@nbb.be Pascal.rodrique@nbb.be