Formulae in the European Finrep Taxonomy SGCB IX European Banking Supervisors XBRL Workshop. Formulae in the European Finrep Taxonomy Paris, October 29, 2008 Secrétariat général de la Commission bancaire SGCB

Formulae in the European Finrep Taxonomy SGCB 2 Target: Implementation of Finrep European Formulae Background: Experience with formula 2004 and translation to 2008 version (software provider) Test if and how each type of European formula can be processed with 2008 version. Needs: European Business specification and technical harmonization Introduction

Formulae in the European Finrep Taxonomy SGCB 3 Summary 1 French Background -3 different types of formulae -French Business Rules -From 2004 to 2008 Version 2 European Formulae -Excel File for specification -Formulae types -Examples of architecture -Drawbacks to be considered 3 Prototype For Implementation -Example of automatic formulae generation

Formulae in the European Finrep Taxonomy SGCB 4 Three types of French formulae Simple aggregation all elements are primary elements that have the same context and unit ex: Calculation Link in all tables. several primary items in one formula with break down by dimension (ex: table 34 CL) dimensional aggregation primary item(s) with same concept name, identifier, period, unit and dimension with each domain member one primary (ex: table 30B BR_49): «aggregator-compositor pattern» French particularity with one formula for each primary item Simple formula addressing every element of the XBRL instance ex: between 100 and 200 formulae Table1.1 Form25 1 French Background

Formulae in the European Finrep Taxonomy SGCB 5 Business Rules -Missing facts: -2 taxonomies to manage different dates of reports (some CL are not triggered when no fact present witch is contrary to business people requirement who wanted an error to be raised) -Different acceptance radius if the bank belongs to « Grands groupes » or not. -Dont need to deal with entity: one instance = one entity + one Taxonomy + one currency -Period: creation of an element « balance start » to differentiate starting and closing period with same date. -segment: no information to take into consideration for formulae in the segment tag 1 French Background

Formulae in the European Finrep Taxonomy SGCB 6 From 2004 to 2008 Version 2004: No modularization, no extensibility but readability, pure XPath -Software provider rules implemented by a member of our subcontractor team -Ex: BR9 Table7 -Equivalent of general variable in 2008 version 2008: Standardization, extensibility, modularity, general semantic -All CL, Aggregation Dimension and simple formulae implemented with Formula 2008 specifications (Software Provider) -Ex: BR9 Table7 -So far: Temporary solution for architecture 2008: Specification limitations -Inter-instances formulae problem: Resolution outside the scope of specification -Very difficult to implement chains (output of a formula becomes the input of another one) -No specification for output 1 French Background

Formulae in the European Finrep Taxonomy SGCB 7 Excel Files for specification Only business specification : Excel File provided with Finrep Types of European formulae Simple aggregation (around 500) ex: Calculation Link in all tables of 2008 Version automation is required - several primary items in one formula with break down by dimension (ex: table 30B BR_48) dimensional aggregation (around 100) - one primary (ex: table 30B BR_49) Simple formula (around 150) ex:Table1.1 Form25 2 European Formulae

Formulae in the European Finrep Taxonomy SGCB 8 Banco de España style guide 2 European Formulae

Formulae in the European Finrep Taxonomy SGCB 9 2 European Formulae Trial implementation of French Formulae Simple aggregation: one file for each template ( t-finrep-br-fr TableXX-formulae.xml) Other formulae: one file for all formulae Other solutions Software vendor solutions: everything in one file

Formulae in the European Finrep Taxonomy SGCB 10 Drawbacks to be considered Real Need of a shared architecture (best practice): all editors should be able to deal with modification of a shared architecture equivalent of Frta for XBRL 2.1 ex : -Spanish XSLT files and specification -Our Contractor implementation -Software provider implementation Defining shared business rules at European level? -periodicity of reports for example -need of being generic for national extensions Target: Firnrep with new ifrs Formulae <> Business Intelligence = still superficial controls (no historical or complex statistical analysis) => not the same goal (control on a report) Backward compatibility (CL, output) at least 2 European Formulae

Formulae in the European Finrep Taxonomy SGCB 11 java prototype: -500 calculations -Need of Mapping File between Excel cells and XBRL Taxonomies (Tool of our Software provider) Jérôme -Use of Bank of Spain xslt files -Java components : Poi, Jdom. No European Codification: use of xbrl names 3 Prototype for implementation

Formulae in the European Finrep Taxonomy SGCB 12 Basic Formulae can be implemented straight away Need of business specification at European level Need for standardization in the architecture for software developers Conclusion