> For the complete documentation index, see [llms.txt](https://docs.liccium.com/documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.liccium.com/documentation/references/standards.md).

# Standards

## IETF

Proposal for an Opt-Out Vocabulary\
<https://www.ietf.org/archive/id/draft-keller-aipref-vocab-01.html>

## ISO

{% hint style="info" %} <img src="/files/qJCE4mvLCewzJCYgCBL3" alt="" data-size="line"> In 2024, ISO published the International Standard Content Code (ISCC) as international standard for digital content identification, ISO 24138:2024.
{% endhint %}

ISO 24138:2024 – International Standard Content Code\
<https://www.iso.org/standard/77899.html>

## W3C

W3C Recommendation Decentralized Identifiers (DIDs) v1.0,\
<https://w3c.github.io/did-core/>

W3C Recommendation Verifiable Credentials Data Model v1.1,\
<https://www.w3.org/TR/vc-data-model/>

did:web Method Specification, 11 January 2023,\
<https://w3c-ccg.github.io/did-method-web/>

Status List 2021, privacy-preserving status information for Verifiable Credentials, [https://w3c.github.io/vc-status-list-2021](https://w3c.github.io/vc-status-list-2021/)

VC Framework EBSI Hub. <https://hub.ebsi.eu/vc-framework>