A core application of XBRL is to facilitate the flow of tagged financial statements and annual reports, from companies and other entities directly to the databases, web sites, and computers of regulators, stakeholders and other information consumers. Increasingly, XBRL provides the technological foundation for the communication of financial information where there is independent assurance. This XBRL-based assurance may be on the financial statements (i.e., an electronically consumable form of today's standard PDF or HTML audit report) or focus on the quality of the XBRL exhibit (i.e., the instance document). Regardless of the type of XBRL assurance report, maintenance of the security and integrity of the instance document is paramount. This conceptual paper identifies and discusses the communication, security challenges and relevant research issues when there is independent assurance on financial statements formatted in XBRL. Successful electronic communication of assurance to information consumers should clearly distinguish the responsibilities of management (i.e., the financial statements) and the auditor (i.e., the audit report). It is important to have an integrated approach where the assurance report, financial statements and other reports in which facts in the financial statements are incorporated are inextricably tied at the level of automated data consumption. Further, as much as possible, human interaction should be accommodated. The paper sets out a range of alternatives for maintenance of security on the assurance report.

With the January 2009 mandate by the US Securities and Exchange Commission of Interactive Data, as well as other governmental mandates and opportunities for compliance burden reductions globally, the Extensible Business Reporting Language (XBRL) is becoming a more common and necessary part of corporate governance and compliance. Due to this external pressure, as well as the primary focus of XBRL advocates themselves to encourage governmental adoption of XBRL for compliance reporting, another important deliverable from XBRL International, Inc. – XBRL's Global Ledger Framework (XBRL GL) – and its obvious and immediate benefits to organisations has been given much less visibility than the external focused efforts; however, XBRL GL has the potential to bring more measurable benefit to companies, in addition to helping support the benefits regulators and the markets receive from more transparent external reporting. XBRL GL serves as a metadata hub (to facilitate system interoperability), as a common face to data from different systems (facilitating common toolsets and controls) and as a tool to enable a seamless audit trail, spanning gaps between systems. XBRL GL seamlessly integrates incoming transactions and external facing reports, acting as a bridge, a single, holistic, generic view of data. While companies can continue to choose proprietary approaches, and while the XBRL Specification itself is sometimes used as the basis for those approaches, it is a proper combination of XBRL GL with XBRL for external reporting that may offer the greatest benefit to companies. While XBRL GL has some obvious potential benefits, the risk to companies and to the market as a whole is that lack of adoption of XBRL GL will lead to a proliferation of proprietary standards at different points in the Business Reporting Supply Chain and for different consumers, such as the world's tax regulators, leading to more confusion and burden instead of providing holistic solutions that provide benefits for all. Those responsible for corporate governance have a responsibility to make sure that interoperability solutions are being chosen with an eye on long-term value, and not just the easiest solution in the short term.

XBRL — Extensible Business Reporting Language — is a collaboratively developed framework for creating standardised and customisable digital representations of financial statements, tax returns and other detailed and summarised business reports and data extracts. Formed by the accounting profession and now involving software developers, regulators, analysts, users and other members of the Business Reporting Supply Chain, XBRL is experiencing global development and adoption. XBRL's potential benefits of increased efficiency and new transparency have brought global market interest, including the Securities and Exchange Commission's (US) XBRL Voluntary Filing Program. The change to digital reporting brings both opportunities and challenges to corporate governance and disclosure. The opportunities facilitated by digital reporting include not only more reusable digital formats, but more types of information being delivered on a far more frequent basis, as well as improved internal reporting and a better controls environment. Those responsible for corporate governance have the opportunity to influence the acceptance and use of XBRL, as well as the responsibility to consider the policies, procedures and practices their organisations need to develop.

Business reports are changing in response to regulatory and market demands. Requests by regulators for electronic filings of financial statements and tax forms are increasing and such filings are rapidly becoming mandatory in many countries. In response, extensible business reporting language (XBRL) is a market-driven, collaborative effort to make electronic filings more useful to, and to reduce the burden on, both publishers and consumers of business reports. XBRL does much more than simply list data items that can be submitted in an electronic filing. XBRL is a complete set of tools for regulators or groups to fully communicate the meanings of and interrelationships among the business reporting concepts. In addition, core sets of concepts from regulators or groups can be extended, expanded, or otherwise modified for more specific communication by jurisdictions, industries, or individual corporations. This unique customization capability lets companies better present their electronic filings as parallels to their paper filings. A “customizable standard” offers new opportunities and new challenges. This paper discusses XBRL's paradoxical power - the trade-offs between customizing to better parallel existing paper reports and compromising to more closely match the standards, and the research needed for the transition from freeform to customized reports.

ABSTRACTBusiness reports are changing in response to regulatory and market demands. Requests by regulators for electronic filings of financial statements and tax forms are increasing and such filings are rapidly becoming mandatory in many countries. In response, extensible business reporting language (XBRL) is a market‐driven, collaborative effort to make electronic filings more useful to, and to reduce the burden on, both publishers and consumers of business reports.XBRL does much more than simply list data items that can be submitted in an electronic filing. XBRL is a complete set of tools for regulators or groups to fully communicate the meanings of and interrelationships among the business reporting concepts. In addition, core sets of concepts from regulators or groups can be extended, expanded, or otherwise modified for more specific communication by jurisdictions, industries, or individual corporations.This unique customization capability lets companies better present their electronic filings as parallels to their paper filings. A “customizable standard” offers new opportunities and new challenges. This paper discusses XBRL's paradoxical power ‐ the trade‐offs between customizing to better parallel existing paper reports and compromising to more closely match the standards, and the research needed for the transition from freeform to customized reports.

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