ESEF Reporting with Tangelo

Since 2021, the European Single Electronic Format (ESEF) has been the official format for filing annual reports for companies listed on EU-regulated markets. This electronic format—also called digital reporting—is based on inline XBRL, combining a human readable (X)HTML version of the annual report with machine-readable XBRL tags embedded in the file. While the report looks like a normal website in a browser, it also contains structured data for regulators and investors.

Producing an ESEF-compliant report is highly technical, especially when using traditional PDF-focused processes. Retrofitting tagging into a layout that wasn’t built for it often leads to complexity, version chaos, and compliance risks. Tangelo makes it simple—with tagging built into the process from the start.

Tangelo helps ensure accuracy and compliance by giving you full control over your tags. A user-friendly taxonomy browser makes it easy to navigate and select the right concepts from the ESEF taxonomy. Expert users can rely on different entry points and hierarchies within the taxonomy, while others benefit from a powerful search function to find the tags they need. To avoid misclassification, the full details of each taxonomy concept— definitions, references, and labels—are displayed before tagging, so you can always be confident you're tagging your facts correctly.

• Easy-to-use taxonomy browser with powerful search

• Full concept detail shown to verify tags

• Supports expert navigation and structured taxonomy views

With Tangelo, block tagging becomes a natural part of your workflow. Other approaches often rely on complex workarounds, like managing fragments in Excel or reapplying tags after every edit. In contrast, Tangelo’s native structured content format makes block tagging both intuitive and robust. You can apply tags to entire notes, paragraphs, tables, lists, titles, or even individual list items—and always see exactly where block tags are placed. Tags are retained when content changes, even when text spans multiple pages. There’s no need to re-tag or manage continuations manually—it all happens seamlessly.

• Apply tags to notes, paragraphs, tables, lists, titles, and more

• Block tags remain intact, even after edits

• No manual continuation tagging across pages

As CSRD introduces mandatory digital reporting for sustainability disclosures, Tangelo is ready to support the next wave of structured reporting. The platform already supports the ESRS taxonomy, allowing you to tag the sustainability statement in the annual report using the same familiar process as ESEF. While the final technical specifications are still being defined, tagging ESRS disclosures is expected to be more complex than tagging financial statements—making it even harder to manage with traditional, PDF-based approaches. With Tangelo, you’re already equipped with a robust, flexible workflow that’s ready to handle both financial and ESG disclosures in one integrated platform.

• Support for ESRS taxonomy

• Same familiar workflow, extended for sustainability

• Built-in flexibility to handle both financial and ESG tags