1. Ignacio Nacho Boixo The XBRL Network of the Committee of European Banking Supervisor May 5, 2008 - Eindhoven, Netherlands How to foster harmonization through Best Practices

2. Basel II, IFRS … EC 2006/48 & 49 … Country 1 Sup 1 Report 2Report 1 ------------ ------------ ------------ Country 3Country 2Country 27 NCB 2FSA 3Sup 27 Report 27 ----------------------------------------- ----------------------------------------- ----------------------------------------- ------------------------------------- Report 3 ----------------------------------------- ----------------------------------------- ----------------------------------------- ------------------------------------- National Regulation Transposition into national Legislation European Law 9X,XX% best practices + EU requirements National Implementation XBRL challenge! How to maintain harmonization? Global best practices

3. Technological standards (as XBRL) are prone to be implemented in an incompatible fashion. Top-down harmonization is a traditional option when a hierarchical authority is on duty. Bottom-up harmonization is based in voluntary persuasion through Best Practices explanations about design/implement. XBRL Best Practices will support the European supervisors and financial institutions by providing a set of relevant and applicable recommendations when developing and implementing XBRL reporting frameworks.

4. ISC International Steering Committee Objective: Ultimately charged with the responsibility of considering and a BPB Part-time XBRL Best Practices Board 7 Members (annual terms), maximum 3 from ISC of which one isChairof XSB BPB Part-time XBRL Best Practices Board 7 Members (annual terms), maximum 3 from ISC of which one isChairof XSB Practices Working Groups 2 Members: Software (XML and XBRL experts) 2 Members: Regulatory Reporting 1 Member: Financial Analysis 2 Members: Program Management Permanent (standing) Temporary (ad hoc) Temporary (ad hoc) Chair Members Objective: Create XBRL development, integration, and maintenance practicesintellectual property appoints selects proposes documents for approvalmonitors compositions elects confirms selection and appointments Vice Chair Chair Members Vice Chair Initial appointment After 1 st Year (if necessary) Initial appointment charters and disbands ISC International Steering Committee Objective: Ultimately charged with the responsibility of considering and approving the release and publication of certain key documents and pronouncements (particularly recommendations) BPB Part-time XBRL Best Practices Board 7 Members (annual terms), maximum 3 from ISC of which one isChairof XSB BPB Part-time XBRL Best Practices Board 7 Members (annual terms) Practices Working Groups 2 Members: Regulatory Reporting 1 Member: Financial Analysis 2 Members: Program ManagementSoftware

5. Request for Comment (RFC): A document describing existing practices. There is value simply in collecting together the practices used in different XBRL projects. While it is best if it contains empirical analysis, no overall evaluation is expected. Practice Note (Note): A document that suggests effective practices for defined situations, reflecting the consensus of the working group insofar as it represents XBRL International.

6. Project Management (PM): Organization and execution of large scale projects, especially taxonomy development and maintenance projects. Reporting Process (RP): Using XBRL appropriately across many organizations in a “supply chain”, taking into consideration all aspects of data exchange. Taxonomy Architecture (TA): Domain, Logical and Physical models to ensure reusability of the content of XBRL taxonomies. Vendor-to-vendor Interoperability (VI): Implementation methods that maximize the likelihood that XBRL produced by one vendor’s product will be interpreted correctly in another.

7. Use of Matrix Schema as communication tool among Supervisors and XBRL experts Project Management and taxonomy extensions Banking Supervisors XBRL Teams coordination Creating instances, identifying filers, rounding Use of open explicit versus typed dimensions Resources: www.corep.info/documents/documents_project.html www.xbrlwiki.info CEBS Best Practices arena www.xbrl.org Website