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CEN Workshop Agreement

Status: Working Group Working Draft

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Contents 1 Scope 2 Normative references 3 Terms and definitions 4 XML and XBRL: Introduction to its technological building blocks 4.1 XML 4.1.1 XML as a markup language 4.1.2 XML structures information 4.1.3 Components of an XML document 4.1.4 Namespaces 4.1.5 Namespaces and prefixes 4.1.6 UNICODE 4.1.7 XML Benefits 4.2 XML Schemas 4.2.1 XML Schema Components 4.2.2 Benefits of using XML Schema 4.3 XLink 4.4 Technological components used by XML and by XBRL 4.4.1 XPath 4.4.2 XSLT 4.4.3 XQuery 5 XBRL: Extensible Business Reporting Language 5.1 High level description 5.1.1 How to structure reporting data? 5.1.2 XBRL Introduction 5.2 XBRL Taxonomies 5.2.1 Schemas 5.2.2 Linkbases 5.3 Extensibility 5.3.1 Taxonomy Extensions 5.3.2 Creating new relationships 5.4 Dimensions 5.4.1 The multidimensional model 5.4.2 XBRL dimensions 5.5 Formulas 5.6 XBRL Reporting: Instance documents 5.7 Validation of XBRL reports 6 Bibliography

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Foreword

This document is a working document. This document has been prepared by CEN/WS XBRL, the secretariat of which is held by NEN. This document is a working document.

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Introduction

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Scope

The objective of this CWA is to provide a roll-out package for regulators who wish to use XBRL. More precisely, this CWA consists of two parts:
:i) An XBRL supervisory roll-out guide: this is oriented towards national regulators on how to implement, extend and manage XBRL taxonomies
:ii) An XBRL handbook for declarers: this is a roll-out guide or reference handbook would give a general introduction to XBRL and serve as a help to preparers of XBRL (reporting entities)

The scope of the current document is on the second part of the CWA; the XBRL handbook for declarers. In this general guide to XBRL, the following subjects will be addressed: [DRAFT]

Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN xyz:199x, Title of the european standard.
EN ab c:199x, General title of series of parts — Part c: Title of part.

Terms and definitions

For the purposes of this document, the following terms and definitions apply / the terms and definitions given in … and the following apply.

Term1 

description on text for term1

Term2 

description on text for term2

XML and XBRL: Introduction to its technological building blocks

This chapter aims to give an overview of the basic technologies that underpin XBRL. Our aim is to give a general introduction of each component in order to obtain a better understanding of this reporting language.

XML

According to the definition of the W3C, XML is a simple and flexible text format, simple and flexible, derivative of SGML. Although originally designed for the publication of information, XML is increasingly important in facilitating electronic communication as will be indicated further below.

Continue general definition of XML

XML as a markup language

Explains with simple examples how XML is made of tags

XML structures information

Explains XML's hierarchical structures

Components of an XML document

Explain XML elements, root node, and use of <? Xml version = "1.0" encoding = "UTF-8"> opening tag

Namespaces

Explain the use of namespaces: reason, URI, …

Namespaces and prefixes

Explain the use of prefixes (by further elaborating existing example)

UNICODE

Explain unicode

XML Benefits

Sum up and explain basic benefits of xml like; human-readable, self-containing, hierarchical structure, platform independent, …

XML Schemas

Introduce XML schema: definition of XML schema, why it is useful

XML Schema Components

Explain: types, attributes, groups of attributes and elements, importing and including schemas, substitution groups, …

Benefits of using XML Schema

Sum up benefits of XML Schema

XLink

Explain xlink

Technological components used by XML and by XBRL

XPath

Explain xpath

XSLT

Explain xslt

XQuery

Explain xquery

XBRL: Extensible Business Reporting Language

High level description

How to structure reporting data?

Before starting to explain XBRL, we would like to show via an example why the structuring of reported data can be useful. Reported financial data tend to be represented a table format. For example, the COREP Capital Adequacy table looks this:

Such a representation of information is very human-readable. However, it is not ideal for machine interpretation, as it is not very structured. As a result, the following question comes to mind: How can we structure this information, so that it can be transmitted and interpreted in a consistent way? For the purpose of this example, we’ll focus on the “Eligible Capital” line, which is highlighted in yellow in the above example.

A first step would be to tag the amount of Eligible Capital in a way that it is directly linked to the concept of Eligible Capital:

<p-ca:EligibleCapital>215</p-ca:EligibleCapital>

Although this information is already quite structured, some contextual information is missing. Information like the currency of the amount:

<p-ca:EligibleCapital unitRef=”EUR”>215</p-ca:EligibleCapital>

And finally, the reporting period:

<p-ca:EligibleCapital unitRef=”EUR” contextRef=”2012-12-31”>215</p-ca:EligibleCapital>

The above example shows, in a nutshell, how XBRL allows to structure reporting data.

XBRL Introduction

XBRL, or eXtensible Business Reporting Language, is a communication standard developed in order to simplify the exchange of business and financial data.
XBRL normalises the format of data (via the use of XML techniques) en the validation of data (via XBRL taxonomies).

ADD Explanation of the link between taxonomies and instance documents (as pictured above)

XBRL also provides among others:

• Standard validation rules (mathematical and logical rules)
• The use of label linkbases (which allows multi-lingual taxonomies)
• The possibility to provide rendering
• Standard toolset which allow to work with XBRL

During the following chapters we explain XBRL more elaborately. We try to give an insight in the following points: …

XBRL Taxonomies

XBRL taxonomy = "metadata" of reporting data. Taxonomies consist of schema's and relationships or linkbases

Schemas

The schema defines business conept (element of the schema) and basic attributes like: data type, period type, balance attribute, …

Linkbases

Explain linkbases like, label linkbase, presentation linkbase, definition linkbase, calculation linkbase

Extensibility

Taxonomy Extensions

Creating new relationships

Dimensions

The multidimensional model

XBRL dimensions

Formulas

XBRL Reporting: Instance documents

Explain with a practical example how an instance document is constructed…

Validation of XBRL reports

Describe the process of the validation of an instance document: xml validation, xml schema validation, xbrl validations, ….

Bibliography

[1] :xxx

[2] :xxx