Research

How to Cite XFIDs

Citation formats for referencing XframeworkID identifiers in academic papers, investment memos, regulatory filings, and term sheets.

Inline Citation

When referencing a specific document in running text:

In a sentence

The issuer's Green Bond Framework (XFID: XF-I5ICTDJ-4) was reviewed by S&P Global Ratings in their Second Party Opinion (XFID: XF-DODU1ON-R).

Parenthetical

...as documented in the framework (XF-I5ICTDJ-4; available at xframework.id).

Bibliography / References

For a full bibliographic entry:

Standard format

[Issuer Name]. "[Document Title]." [Year]. XframeworkID: [XFID]. Available at: https://xframework.id/[XFID]

Example

Iberdrola, S.A. "Green Bond Framework." 2024. XframeworkID: XF-I5ICTDJ-4. Available at: https://xframework.id/XF-I5ICTDJ-4

Dataset Citation

When citing the XframeworkID registry as a data source:

Full dataset

XframeworkID. "Extra-Financial Disclosure Registry." Accessed [date]. https://xframework.id/data

BibTeX

@misc{xfid:XFI5ICTDJ4,
  author = {Iberdrola, S.A.},
  title  = {Green Bond Framework},
  year   = {2024},
  note   = {XframeworkID: XF-I5ICTDJ-4},
  url    = {https://xframework.id/XFI5ICTDJ4}
}

@dataset{xframeworkid:registry,
  author = {Howard, Ian},
  title  = {XframeworkID (XFID) Registry — Labelled-Bond
            Disclosure Document Dataset},
  year   = {2026},
  publisher = {Zenodo},
  doi    = {10.5281/zenodo.21297903},
  url    = {https://xframework.id/data}
}

Why Cite XFIDs

Permanence

XFIDs are content-based identifiers. They don't change when issuers move or remove documents. A citation using an XFID will resolve years after the original URL breaks.

Reproducibility

Two researchers citing the same framework with an XFID are provably referencing the same document. The identifier is computed from the content itself.

Version Tracking

If a document is revised, the new version gets a different XFID. Your citation locks to the exact version you analysed, even if the issuer updates it later.

Persistence & Continuity Policy

What happens to your citation if this registry goes away? Three commitments, in decreasing dependence on us:

1. Operator-independent archive

The full XFID→metadata→hash mapping is deposited as versioned snapshots on Zenodo (CERN infrastructure), independently of this registry: doi:10.5281/zenodo.21297903. If xframework.id disappears, every XFID remains resolvable against the archived dataset.

2. Published algorithm

The identifier algorithm (SHA-256 of canonical content, Base36, Luhn check digit) is public and stays public. Anyone holding any copy of a cited document can recompute its XFID and verify a match — no registry required.

3. Better than a dead DOI

A tombstoned DOI loses the content behind it. An XFID's content hash survives in the archive and still verifies any surviving copy, wherever it is. The citation degrades to “verifiable fingerprint” — never to nothing.

Tooling: document pages carry Zotero-readable citation metadata, and the resolver supports content negotiation — curl -H "Accept: application/x-bibtex" https://xframework.id/{XFID} returns BibTeX (CSL-JSON via application/vnd.citationstyles.csl+json).

Third-party recognition: xfid is a registered identifiers.org prefix, giving XFIDs standing alongside DOIs and other MIRIAM-registered schemes in tools that resolve compact identifiers (their redirect still points here, so this is about recognition, not an independent copy).

Identifier Formats

Prefix	Entity	Example	Resolves at
`XF`	Document	`XF-I5ICTDJ-4`	xframework.id/XFI5ICTDJ4
`XP`	Person (analyst)	`XP3VN7Q7TV`	xframework.id/XP3VN7Q7TV
`XO`	Organization	`XO7KN83X7F`	xframework.id/XO7KN83X7F

The display format (with dashes: XF-I5ICTDJ-4) and the compact format (without: XFI5ICTDJ4) both resolve to the same page.

Documents are also resolvable as a compact identifier via identifiers.org — xfid:XFI5ICTDJ4 resolves through their registry to the same page, alongside DOIs, ISBNs and other MIRIAM-registered identifier schemes.

Access the Data

Researchers can access the full XframeworkID dataset for academic use.

Search the Registry Request Data Access