XframeworkID (XFID) is an open registry of permanent, content-based identifiers for extra-financial disclosure documents associated with labelled bond issuances — green, social and sustainability bond frameworks, Second Party Opinions (SPOs), EU Green Bond Standard pre/post-issuance reviews and factsheets, impact and allocation reports, certifications, assurance reports, and academic research analysing labelled bonds. XFIDs are derived from a SHA-256 hash of the document's canonical content, so an identifier permanently and verifiably denotes one specific document version regardless of where the file is hosted — addressing the measured erosion of this disclosure class (23% of tracked documents are no longer accessible at their original URLs). The registry cross-references documents to issuers, bond ISINs, assessment providers and analysts, and is used for citation in academic research, investor due diligence and regulatory monitoring.

Prefix

xfid

Links

Homepage

Pattern for Local Unique Identifiers

Local identifiers in xfid should match this regular expression:
^XF[A-Z0-9]{8}$

Example Local Unique Identifier

XFI5ICTDJ4   Resolve

Pattern for CURIES

Compact URIs (CURIEs) constructed from xfid should match this regular expression:
^xfid:XF[A-Z0-9]{8}$

Example CURIE

xfid:XFI5ICTDJ4

Contact

Missing Contact

Mappings from records in Bioregistry to external registries comprises the metaregistry. This resource has 1 mapping to an external registry.

A provider turns a local unique identifiers from a resource into a URI. Many providers are also resolvable as URLs (i.e., they can be used in a web browser).

The local unique identifier XFI5ICTDJ4 is used to demonstrate the providers available for xfid. Some providers may use a different example, which is displayed in the table below. A guide for curating additional providers can be found here.