Compendium

Climate / Sustainability / Carbon-Accounting DSLs Family Index

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Climate / Sustainability / Carbon-Accounting DSLs Family Index

type: language-family-index family: climate-carbon languages_catalogued: 26 tags: [language-reference, family-index, climate-carbon, ghg-protocol, iso-14064, esrs, csrd, ifrs-s2, issb, tcfd, sbti, cdp, verra, pcaf, eu-taxonomy, xbrl]

Climate / Sustainability / Carbon-Accounting — Family Index

Family overview

Climate/sustainability “languages” are not programming languages — they are the textual schemas, reporting formats, and accounting grammars used to encode greenhouse-gas (GHG) inventories, climate disclosures, and ESG data into a form a regulator, auditor, or downstream investor can actually parse. The family sits at the intersection of accounting standards, regulatory XBRL taxonomies, voluntary-market registries, and scientific methodology guidelines. The structural backbone is the GHG Protocol Corporate Standard (WRI/WBCSD, revised edition 2004) which introduced the scope 1 / scope 2 / scope 3 partition that every downstream framework now reuses; the Corporate Standard is currently undergoing its first major revision since 2004, with a full draft due to public consultation in mid-2026 and a third edition expected by end-2027 (GHG Protocol Phase 1 progress update, December 2025).

Sitting alongside the GHG Protocol is the ISO 14060 family — ISO 14064-1/-2/-3 for organisational, project, and verification GHG accounting; ISO 14067 for product carbon footprint; and the newer ISO 14068-1:2023 (Carbon neutrality) which was published in November 2023 and officially replaces PAS 2060 (ISO 14068-1:2023 page). For disclosure-level reporting, three regimes dominate as of 2026: GRI Universal Standards 2021 (effective for reporting from 1 January 2023, the voluntary multi-stakeholder baseline); ESRS Set 1 under the EU’s CSRD (mandatory for ~50,000 EU/EU-adjacent companies, though the Omnibus simplification package adopted in 2025 has narrowed scope and delayed Wave 2 to FY2027 reporting in 2028); and the ISSB’s IFRS S1 (General) + IFRS S2 (Climate), effective 1 January 2024, now formally adopted or in adoption pathway in roughly 40 jurisdictions and mandatorily effective from 1 January 2026 in Chile, Qatar, and Mexico, with Brazil phasing in from FY2026 (IFRS Foundation jurisdictional profiles, June 2025).

TCFD — historically the de facto climate-disclosure framework after the 2017 FSB recommendations — was formally wound down at COP28 in October 2023 and the IFRS Foundation took over monitoring from 1 January 2024; companies applying IFRS S2 are now considered to satisfy the TCFD recommendations, which are fully incorporated into S2 (IFRS Foundation announcement, July 2023). The US SEC Climate Disclosure Rule (adopted March 6, 2024) was stayed almost immediately by court order, and on March 27, 2025 the Commission voted to withdraw its defence; as of May 2026 the rule is on indefinite life support and is not expected to take effect in the current US administration (SEC press release 2025-58). The vacuum is being filled by state-level rules — California’s SB-253 / SB-261 most notably — and by IFRS S2 adoption abroad.

The fourth layer is the digital-tagging / XBRL wave. The ESRS Set 1 XBRL Taxonomy, published by EFRAG on 30 August 2024, is the first major sustainability XBRL taxonomy and the most ambitious attempt to turn narrative ESG reports into machine-readable, comparable data; EFRAG’s 2026 work programme is committed to delivering an updated taxonomy by December 2026 to support integration with the European Single Electronic Format (ESEF) (EFRAG press release, August 2024). Below all of this sit the voluntary carbon market standards — VCS/Verra, Gold Standard, REDD+ — currently in a post-2023 integrity reckoning following media exposés on Kariba, Shell rice-paddy credits, and broader rainforest-offset issues, with SBTi’s draft Corporate Net-Zero Standard V2 (final expected mid-to-late 2026) attempting to formally re-integrate verified carbon credits into corporate net-zero pathways via the new “Ongoing Emission Responsibility” framework. And underneath the corporate layer sits the national-inventory layer: IPCC 2006 Guidelines + 2019 Refinement for methodology, and the UNFCCC Common Reporting Tables (CRT) under the Paris Agreement’s Enhanced Transparency Framework (first Biennial Transparency Reports due 31 December 2024).

In our deep library

None catalogued. Climate/sustainability reporting standards do not have standalone deep-library notes in this vault; they are schema/grammar specifications, not programming languages.

Cross-reference:

  • financial-regulatory — the XBRL sibling. Financial XBRL (IFRS Taxonomy, US-GAAP Taxonomy, ESEF) is the older twin of ESRS XBRL, and ESG reporting increasingly overlaps with statutory-financial filings under IFRS S1+S2.
  • government-civictech — regulatory reporting infrastructure overlaps heavily (Inline XBRL via ESEF, government registry XML formats, CSRD mandates).
  • api-description — most disclosure formats are XSD/XBRL schemas with JSON-LD alternates (CDP, EU Taxonomy Regulation data structure).
  • citation-formats — regulatory citation conventions and cross-reference structures.
  • notation-spec — formal grammars and the BNF/XSD-style specification style used for taxonomy definitions.
  • insurance-actuarial — IFRS S2 adoption interacts with insurance underwriting climate-risk disclosure; PCAF Part C covers insurance-associated emissions.
  • retail-supplychain — scope 3 / value-chain emissions overlap with GS1/EPCIS traceability data.
  • energy-power — IEC CIM / CGMES grid data feeds into Scope 2 location-based + market-based emissions calculations; OCPP/OCPI EV-charging data is increasingly used in fleet-emissions reporting.

Tier 3 family table — GHG accounting frameworks

FormatFirst appearedOriginTypeStatus (2026)URL
GHG Protocol Corporate Standard2001 (1st ed.), 2004 (revised ed.)WRI / WBCSDFoundational corporate-emissions accounting framework; defines scope 1 / 2 / 3 partitionDe facto standard, currently being revised; full draft expected mid-2026, 3rd edition by end-2027https://ghgprotocol.org/corporate-standard
GHG Protocol Scope 3 Standard2011WRI / WBCSDValue-chain emissions across 15 categories (purchased goods, transport, use-phase, end-of-life, etc.)Active; Phase 1 revision in progress, March 2026 progress update issuedhttps://ghgprotocol.org/standards/scope-3-standard
GHG Protocol Product Life Cycle Standard2011WRI / WBCSDProduct-level cradle-to-grave / cradle-to-gate accountingActivehttps://ghgprotocol.org/product-standard
GHG Protocol Scope 2 Guidance2015WRI / WBCSDLocation-based vs market-based electricity accountingUnder revision; 60-day public consultation closed 31 Jan 2026, moving toward hourly matching for RECshttps://ghgprotocol.org/scope-2-guidance
ISO 14064-12006 (1st ed.), 2018 (2nd ed.)ISOOrganisational GHG inventory specificationCurrent edition 2018https://www.iso.org/standard/66453.html
ISO 14064-22006 (1st ed.), 2019 (2nd ed.)ISOProject-level GHG quantificationCurrent edition 2019https://www.iso.org/standard/66454.html
ISO 14064-32006 (1st ed.), 2019 (2nd ed.)ISOVerification & validation of GHG assertionsCurrent edition 2019; required by ISO 14068-1 for carbon-neutrality claimshttps://www.iso.org/standard/66455.html
ISO 140672013 (TS), 2018 (Standard), 2022 (Amd 1)ISOProduct carbon footprint quantificationCurrenthttps://www.iso.org/standard/71206.html
ISO 14068-1November 2023ISOCarbon neutrality at organisation/product level; mitigation hierarchy + verified offsetsCurrent, replaces PAS 2060https://www.iso.org/standard/43279.html
PAS 20502008 (rev. 2011)BSIPublicly Available Specification — product carbon footprintActive (specialised use); largely superseded by ISO 14067https://www.bsigroup.com/en-GB/standards/pas-2050/
PAS 20602010 (rev. 2014)BSICarbon neutrality specificationWithdrawn / superseded by ISO 14068-1 (November 2023)https://www.bsigroup.com/en-GB/insights-and-media/insights/brochures/pas-2060-carbon-neutrality/
GLEC Framework2016 (v1), 2023 (v3.0)Smart Freight CentreLogistics emissions accounting harmonised with ISO 14083:2023Current v3.0; aligned with ISO 14083:2023 for transport-chain emissionshttps://www.smartfreightcentre.org/en/our-programs/global-logistics-emissions-council/

Tier 3 family table — Disclosure standards (corporate)

FormatFirst appearedOriginTypeStatus (2026)URL
GRI Universal Standards 1, 2, 32021 (revision approved Jul 2021)Global Reporting InitiativeVoluntary multi-stakeholder sustainability disclosure (Foundation / General Disclosures / Material Topics)Effective for reporting from 1 Jan 2023; the dominant voluntary global baselinehttps://www.globalreporting.org/standards/standards-development/universal-standards/
GRI Topic Standards (200/300/400 series)2016 onwardGRITopic-specific disclosures (economic, environmental, social)Active, ongoing modular updateshttps://www.globalreporting.org/standards/
GRI Sector Standards2021 onward (Oil & Gas first)GRISector-specific impact disclosureActive, sector standards rolling out (Oil & Gas, Coal, Agriculture, Mining published)https://www.globalreporting.org/standards/sector-standards-project-for-oil-and-gas/
ESRS Set 1 (12 standards)2023 (delegated act 31 Jul 2023)EFRAG / European CommissionEU CSRD-mandated disclosure standards (ESRS 1, ESRS 2, + 10 topical)Mandatory under CSRD, scope narrowed by 2025 Omnibus package; Wave 1 continues 2026 reporting, Wave 2 deferred to FY2027https://www.efrag.org/en/projects/esrs-set-1-implementation/concluded
CSRD (Corporate Sustainability Reporting Directive)EU Directive 2022/2464, in force Jan 2023European UnionRegulation requiring ESRS reportingIn force; substantially amended by Omnibus (2025), Omnibus Quick-Fix delegated act in force 28 Jan 2026https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32022L2464
IFRS S1 (General Sustainability Disclosure)June 2023 (issued), effective 1 Jan 2024ISSB / IFRS FoundationCross-cutting general sustainability-related financial disclosure requirementsEffective; adopted/in adoption in ~40 jurisdictions; mandatory from 1 Jan 2026 in CL, QA, MXhttps://www.ifrs.org/issued-standards/ifrs-sustainability-standards-navigator/ifrs-s1-general-requirements/
IFRS S2 (Climate-related Disclosures)June 2023 (issued), effective 1 Jan 2024ISSB / IFRS FoundationClimate-specific disclosures; fully incorporates the TCFD recommendationsEffective; superseded TCFD from 1 Jan 2024https://www.ifrs.org/issued-standards/ifrs-sustainability-standards-navigator/ifrs-s2-climate-related-disclosures/
TCFD recommendationsJune 2017 (final report)Task Force on Climate-related Financial Disclosures (FSB)Four-pillar framework: Governance / Strategy / Risk Mgmt / Metrics & TargetsWound down COP28 October 2023; monitoring transferred to IFRS Foundation 1 Jan 2024; companies meeting IFRS S2 considered TCFD-complianthttps://www.fsb-tcfd.org/
SEC Climate Disclosure RuleAdopted 6 March 2024US Securities and Exchange CommissionMandatory climate-risk + scope 1/2 (+ limited scope 3) disclosure for SEC registrantsStayed by 8th Circuit + SEC withdrew defence 27 Mar 2025; not in effect, indefinite limbo as of May 2026https://www.sec.gov/rules/final/2024/33-11275.pdf
California SB-253 / SB-261Signed Oct 2023; SB-219 amendments 2024State of CaliforniaState-level scope 1/2/3 disclosure (SB-253) + climate-risk disclosure (SB-261) for large US companies doing business in CAActive; reporting deadlines extended by SB-219; emerging as de facto US disclosure floor in absence of SEC rulehttps://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202320240SB253
SBTi Corporate Net-Zero StandardOctober 2021 (V1.0), V1.2 in use 2024+Science Based Targets initiative (CDP, UNGC, WRI, WWF)Validation framework for 1.5°C-aligned corporate net-zero targetsV1.2 current; V2.0 draft in 2nd public consultation, final mid-to-late 2026, mandatory for new targets from Jan 2028https://sciencebasedtargets.org/net-zero
SBTi Near-Term Criteria2015 onwardSBTiTarget-validation criteria for 5–10-year reduction targetsCurrent; folded into Corporate Net-Zero Standardhttps://sciencebasedtargets.org/resources/files/Near-term-Criteria.pdf
CDP Full Corporate Questionnaire2002 (founded as Carbon Disclosure Project)CDP WorldwideIntegrated questionnaire — climate, water, forests, plastics, biodiversity merged in 2024+2025/2026 cycle active; 13 modules, interoperable with ESRS/IFRS S2/GRI/TCFD/TNFDhttps://www.cdp.net/en/companies-discloser

Tier 3 family table — XBRL / digital-tagged sustainability

FormatFirst appearedOriginTypeStatus (2026)URL
ESRS Set 1 XBRL Taxonomy30 August 2024EFRAGXBRL taxonomy for digital-tagging of ESRS sustainability statements; integrates with ESEFPublished; first major sustainability XBRL taxonomy; updated version targeted December 2026 for FY2025 reportshttps://www.efrag.org/en/projects/esrs-xbrl-taxonomy/concluded
IFRS Sustainability Disclosure TaxonomyApril 2024IFRS FoundationXBRL taxonomy for IFRS S1 + S2 digital taggingActive, aligned with ISSB standardshttps://www.ifrs.org/sustainability/sustainability-disclosure-taxonomy/
EU Taxonomy Regulation (Regulation (EU) 2020/852)2020 (regulation), 2021/2022 delegated actsEuropean UnionClassification system for environmentally-sustainable economic activities; six environmental objectivesActive; substantially simplified by Delegated Regulation (EU) 2026/73 (published OJ 8 Jan 2026, in force 28 Jan 2026) — 10% materiality threshold addedhttps://finance.ec.europa.eu/sustainable-finance/tools-and-standards/eu-taxonomy-sustainable-activities_en
GRI XBRL Taxonomy2009 (first release)GRI / DeloitteXBRL taxonomy for GRI disclosuresActive but lower velocity; superseded in practice by ESRS XBRL for EU filershttps://www.globalreporting.org/standards/xbrl/
EFRAG Digital Reporting / Listed-SME TaxonomyProposed 2025+EFRAGXBRL taxonomy for the voluntary listed-SME standard (VSME) and Listed-SME standard (LSME)Under development, part of EFRAG 2026 work programmehttps://www.efrag.org/en/projects/lsme-listed-sme-esrs/concluded

Tier 3 family table — Carbon markets & credits

FormatFirst appearedOriginTypeStatus (2026)URL
VCS (Verified Carbon Standard) / Verra2006Verra (originally Voluntary Carbon Standard Association)Largest voluntary carbon-credit standard; project methodologies, registry, serial-numbered VCUsActive, VCS Version 5 released 2025; under post-2023 integrity scrutiny (Kariba REDD+ scandal, Shell rice-paddy “hot air” replacement credits 2025)https://verra.org/programs/verified-carbon-standard/
Gold Standard for the Global Goals2003 (Gold Standard CDM), 2017 (GS4GG)Gold Standard Foundation (WWF-initiated)Premium-positioned voluntary carbon credit standard; co-benefits emphasis (SDG-linked)Active; positioned as the integrity-premium alternative to VCShttps://www.goldstandard.org/
REDD+ (UNFCCC)2007 (Bali Action Plan), Warsaw Framework 2013UNFCCCFramework for Reducing Emissions from Deforestation and Forest Degradation in developing countriesActive at framework level; private-sector REDD+ credits (under VCS, ART/TREES) in heavy scrutinyhttps://redd.unfccc.int/
ART/TREES (Architecture for REDD+ Transactions)2021Architecture for REDD+ TransactionsJurisdictional-scale REDD+ crediting frameworkActive; favoured for jurisdictional vs project-scale REDD+https://www.artredd.org/trees/
CORSIA Eligible Emissions Units2019 (programme), ICAOInternational Civil Aviation OrganizationCarbon Offsetting and Reduction Scheme for International Aviation; eligible-unit standardsActive; phased mandatory phase 2024-2026 → 2027+https://www.icao.int/environmental-protection/CORSIA/Pages/default.aspx
ICVCM Core Carbon Principles2023Integrity Council for the Voluntary Carbon MarketQuality-label framework for high-integrity voluntary carbon creditsActive; CCP-approved methodologies being rolled outhttps://icvcm.org/the-core-carbon-principles/
PCAF Global GHG Accounting & Reporting Standard for the Financial Industry2020 (Part A, financed emissions); 2022 (Part B, facilitated); 2023 (Part C, insurance-associated)Partnership for Carbon Accounting FinancialsFinancial-sector emissions accounting (asset classes 1–7 + use-of-proceeds, securitisations, sub-sovereign)Updated December 2025; 4 new methodologies + IFRS S1/S2 integrationhttps://carbonaccountingfinancials.com/standard
EPD (Environmental Product Declaration, ISO 14025)2006 (ISO 14025), PCR-basedISO + national programme operatorsType III environmental label; LCA-backed product-level declarationsActive; widely used in construction/materials sectorshttps://www.iso.org/standard/38131.html
PEF / OEF (Product/Organisation Environmental Footprint)2013 (recommendation), 2021 (rev. recommendation)European Commission JRCEU LCA methodology — product-level (PEF) + organisation-level (OEF) with category rules (PEFCRs/OEFSRs)Active; under integration with ESRS environmental disclosureshttps://environment.ec.europa.eu/topics/circular-economy/environmental-footprint-methods_en

Tier 3 family table — Country / national inventories

FormatFirst appearedOriginTypeStatus (2026)URL
IPCC 2006 Guidelines for National GHG Inventories2006IPCC Task Force on National GHG Inventories (TFI)Methodology for national inventory compilation — Tier 1/2/3, AFOLU, IPPU, Energy, WasteCurrent baseline; complemented by 2019 Refinementhttps://www.ipcc-nggip.iges.or.jp/public/2006gl/
2019 Refinement to the 2006 IPCC GuidelinesMay 2019 (adopted IPCC-49)IPCC TFIMethodology updates/elaborations — does NOT replace 2006 guidelines but used alongsideCurrent, supplements 2006 Guidelineshttps://www.ipcc.ch/report/2019-refinement-to-the-2006-ipcc-guidelines-for-national-greenhouse-gas-inventories/
UNFCCC Common Reporting Tables (CRT) / Common Tabular Formats (CTF)2022 (decision 5/CMA.3); first BTRs due Dec 2024UNFCCC / Paris AgreementElectronic reporting tables for Biennial Transparency Reports under the Enhanced Transparency Framework (ETF)Active; first BTR cycle completed 31 Dec 2024; replaces CRF (previously used under Convention)https://unfccc.int/process-and-meetings/transparency-and-reporting/reporting-and-review-under-the-paris-agreement
UNFCCC CRF (Common Reporting Format)1999 (revised 2013)UNFCCCPredecessor electronic GHG inventory reporting format under the Convention (Annex I)Legacy; superseded by CRT under Paris Agreement ETF from 2024https://unfccc.int/process/transparency-and-reporting/reporting-and-review-under-the-convention/greenhouse-gas-inventories-annex-i-parties/national-inventory-submissions
ISO 14091 (Adaptation to climate change — Vulnerability, impacts, risk assessment)July 2021ISOClimate-change adaptation methodology — vulnerability/impact/risk assessmentCurrenthttps://www.iso.org/standard/68508.html
ISO 14080 (GHG management — Framework for methodologies)2018ISOFramework for developing/managing GHG mitigation methodologiesCurrenthttps://www.iso.org/standard/67315.html

Notable threads

  • GHG Protocol as the foundation everything else rebuilds on. The scope 1 / 2 / 3 partition introduced in the 2001 Corporate Standard (and refined in the 2004 revised edition) is so embedded that it appears verbatim in ISO 14064-1, in ESRS E1, in IFRS S2, in CDP’s questionnaire, in SBTi’s target methodologies, and in PCAF’s financed-emissions categorisation. The standard is voluntary and non-statutory, but functions as the universal lingua franca because every regulatory regime that came after chose to import its vocabulary rather than invent a new one. The current Phase 1 revision (full draft mid-2026, publication end-2027) is the first major revision in over 20 years and includes hourly-matching scope 2 accounting, which would significantly change how renewable-energy claims are made.

  • CSRD-mandated ESRS as the largest expansion of mandatory sustainability reporting in history — now scaled back. When the CSRD entered into force in January 2023, it was estimated to bring ~50,000 companies into mandatory ESRS reporting. The 2025 EU Omnibus simplification package (Delegated Regulation (EU) 2026/73, in force 28 Jan 2026) materially narrowed scope: Wave 2 deferred from FY2025/2026 to FY2027/2028, Wave 3 (listed SMEs) dropped entirely, and a 10% materiality threshold added for EU Taxonomy alignment. Wave 1 (large public-interest entities, banks, insurers with 500+ employees) continues reporting through 2026 unaffected. The political dynamic is “implementation reality bites” — preparers reported the volume of datapoints was unmanageable, and the EU prioritised competitiveness concerns.

  • IFRS S2 effectively replacing TCFD as the global climate-disclosure baseline. TCFD was the dominant climate disclosure framework from 2017 until COP28 in October 2023, when it was wound down and the IFRS Foundation took over monitoring effective 1 January 2024. IFRS S2 incorporates the TCFD recommendations verbatim into its four-pillar structure (Governance / Strategy / Risk Management / Metrics & Targets), so an S2-compliant report is TCFD-compliant by construction. As of January 2026, IFRS S1+S2 is mandatorily effective in Chile, Qatar, Mexico, and (phased) Brazil; voluntarily adopted or in adoption pathway in roughly 40 jurisdictions including Australia, Singapore, Hong Kong, Japan, Malaysia, UK (Sustainability Disclosure Requirements path), Canada (CSSB).

  • The SEC climate-rule limbo and the rise of state-level US disclosure. The SEC’s March 2024 final rule was stayed by the Eighth Circuit before its effective date, and the SEC voted 27 March 2025 to withdraw its defence. As of May 2026, the rule is technically still on the books but unenforced and unlikely to take effect in the current administration. The void is being filled by California’s SB-253 / SB-261 (with deadlines extended via SB-219), which applies extraterritorially to large companies doing business in California — making CA the de facto US disclosure baseline. New York and other states are considering similar legislation.

  • XBRL as the “machine-readable sustainability” inflection point. Until 2024, sustainability reports were free-form PDFs, manually compared by analysts. The ESRS Set 1 XBRL Taxonomy (EFRAG, 30 August 2024) is the first major sustainability XBRL taxonomy and represents the same inflection point that financial XBRL did in 2009 — narrative text becomes tagged datapoints, comparable across companies, query-able by regulators. EFRAG’s December 2026 update is designed for first mandatory digital filings on FY2025 reports. The IFRS Sustainability Disclosure Taxonomy (April 2024) does the same for IFRS S1+S2. Expect convergence pressure (just as IFRS Taxonomy / US-GAAP Taxonomy / ESEF interoperability emerged in financial reporting).

  • SBTi V2 and the carbon-credit reintegration. SBTi’s Corporate Net-Zero Standard V1.0 (2021) effectively excluded carbon credits from corporate net-zero claims, restricting them to “beyond value chain mitigation” (BVCM) — a deliberate response to greenwashing concerns. The April 2024 board statement reversing this triggered staff revolt; the resulting V2.0 draft (final mid-to-late 2026, mandatory Jan 2028) formalises a new “Ongoing Emission Responsibility (OER)” framework requiring companies to take responsibility for an increasing share of unabated emissions via ex-post mitigation outcomes (i.e., verified carbon credits), reaching 100% by 2050 and removals-only post-2035 for residual emissions. This is the largest single shift in net-zero accounting in five years.

  • The voluntary-carbon-market post-2023 reckoning. Investigations by The Guardian, Die Zeit, and SourceMaterial in January 2023 exposed that the vast majority of Verra rainforest-protection (REDD+) credits did not represent real emissions reductions. Subsequent fallout: Verra used ~960,000 “replacement” credits from other failed Chinese rice-paddy projects in December 2025 to cover Shell’s discredited offsets (themselves widely viewed as inadequate); the Kariba REDD+ megaproject required replacement of 10M+ already-retired credits; CarbonPlan and academic auditing studies (Mongabay, September 2025) found systemic flaws in independent auditor independence. Verra released VCS Version 5 in 2025 in response, and the ICVCM Core Carbon Principles (2023) emerged as an integrity-overlay framework. Gold Standard has gained share by positioning as the integrity-premium alternative.

Citations

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