GRI Digital Reporting
GRI is developing digital reporting capabilities to make sustainability data machine-readable — enabling automated comparison, analysis, and integration with financial data platforms. As CSRD mandates XBRL tagging for sustainability reports, understanding the GRI digital reporting landscape is increasingly important.
GRI is developing digital reporting capabilities to make sustainability data machine-readable — enabling automated comparison, analysis, and integration with financial data platforms. Sustainability reports have traditionally been PDF narratives — readable by humans but not by computers.
Why machine-readable sustainability data matters
Sustainability reports have traditionally been PDF narratives — readable by humans but not by computers. This creates significant inefficiency: ESG rating agencies manually extract data from hundreds of reports; investors cannot automate sustainability analysis; regulators cannot programmatically monitor compliance; and cross-company comparison requires laborious manual work.
XBRL (eXtensible Business Reporting Language) solves this by adding machine-readable tags to each data element — allowing automated extraction, comparison, and analysis. CSRD mandates iXBRL (inline XBRL) for all sustainability reports filed via ESAP — the most significant regulatory driver of machine-readable sustainability data ever implemented.
For GRI reporters: CSRD's XBRL mandate covers the ESRS-required content of the sustainability report. GRI-specific disclosures that exceed ESRS requirements are not currently required to be XBRL-tagged under CSRD. However, the market direction is toward fully machine-readable sustainability disclosure — GRI reporters that build XBRL-ready data infrastructure position themselves for the emerging digital reporting environment.
Data aggregation benefits: Once sustainability data is machine-readable and filed on ESAP, it becomes automatically available to: ESG data providers who build products on top of ESAP data; institutional investors running automated sustainability screening; regulators monitoring sector-level sustainability performance; and academic researchers tracking corporate sustainability trends.
The EFRAG ESRS XBRL Taxonomy — the current standard
The EFRAG ESRS XBRL Taxonomy is the mandatory tagging standard for CSRD sustainability reports. It covers all datapoints across all 12 ESRS standards — including both quantitative (numbers) and qualitative (text) disclosures.
Taxonomy statistics: The full ESRS XBRL Taxonomy (as of 2026) contains over 1,200 elements covering all ESRS datapoints. ESRS 2 has 89 tagged elements; ESRS E1 has 198 tagged elements; ESRS S1 has 134 tagged elements.
For GRI reporters transitioning to CSRD: the EFRAG ESRS XBRL Taxonomy is the tagging standard you need to implement. GRI disclosures that are not covered by ESRS do not need to be tagged — you are not required to create custom XBRL tags for GRI-only content. Focus XBRL implementation on ESRS-required content.
Taxonomy updates: EFRAG updates the ESRS XBRL Taxonomy annually — reflecting Amended ESRS changes and technical improvements. Always use the taxonomy version corresponding to your reporting year. ESAP validation rules check for correct taxonomy version — using an outdated taxonomy will cause filing rejection.
ESG data platform integration: Most ESG data platforms that generate XBRL output maintain current taxonomy versions and update automatically when new versions are published. This is one of the primary reasons to use a dedicated platform for CSRD reporting rather than manual tagging tools.
GRI and XBRL — the convergence direction
GRI is developing its own digital reporting capabilities — a GRI XBRL taxonomy that would make GRI-specific disclosures machine-readable alongside the EFRAG ESRS Taxonomy.
GRI Digital initiative: GRI launched a digital taxonomy project to create XBRL tags for GRI Universal Standards and Topic Standards — enabling machine-readable GRI disclosure independent of CSRD. The GRI taxonomy development is aligned with XBRL international standards and designed to be compatible with EFRAG's ESRS taxonomy.
Convergence with ESRS: Given the 80% overlap between GRI and ESRS disclosures, the GRI and EFRAG taxonomies will have significant overlap — ideally linked through explicit element mapping so that a single tagged disclosure satisfies both GRI and ESRS machine-readability requirements.
Timeline: GRI digital taxonomy development is ongoing — monitor globalreporting.org for publication dates. For immediate CSRD compliance, implement the EFRAG ESRS XBRL Taxonomy. GRI digital reporting adds future capability for GRI-specific disclosures.
For non-CSRD GRI reporters: if you report GRI voluntarily without CSRD obligation, XBRL tagging is currently voluntary. Building XBRL-ready data infrastructure now prepares for potential future mandatory digital reporting requirements and improves data quality for ESG rating agency consumption.
Frequently asked questions
Do we need to XBRL-tag our GRI report if we are not subject to CSRD?
Not currently — XBRL tagging is only mandatory under CSRD. Voluntary GRI reporters are not required to produce machine-readable reports. However, ESG data providers increasingly prefer structured data over PDF reports — and GRI digital taxonomy development signals the direction of travel toward machine-readable voluntary sustainability disclosure.
Can we satisfy both ESRS and GRI XBRL requirements with one tagging exercise?
Yes — for the overlapping content (approximately 80% of GRI Topic Standard disclosures have ESRS equivalents), a single XBRL-tagged disclosure satisfies both where the elements are mapped. The GRI digital taxonomy is being designed with ESRS interoperability in mind. For GRI-only disclosures (topics not covered by ESRS), separate GRI taxonomy tags will be needed when the GRI taxonomy is finalised.
What is ESAP and how does it relate to GRI reporting?
ESAP (European Single Access Point) is the EU's central repository for regulated company disclosures — financial statements, prospectuses, and from 2025, CSRD sustainability reports. GRI reports are not filed on ESAP — they are voluntary reports published on company websites. CSRD sustainability reports (which may incorporate GRI disclosures) are filed on ESAP in iXBRL format. ESAP makes CSRD-required content publicly accessible and machine-readable.