---
title: Hypercerts Lexicons
description: Lexicon reference for Hypercerts record types — activity claims, contributions, evaluations, and more.
---

# Hypercerts Lexicons

These lexicons define the record types for tracking impact work in the `org.hypercerts` namespace. The **activity claim** is the central record — all other types attach to it.

| Lexicon | NSID | Description |
|---------|------|-------------|
| **[Activity Claim](/lexicons/hypercerts-lexicons/activity-claim)** | `org.hypercerts.claim.activity` | The core hypercert record — who did what, when, where |
| **[Contribution](/lexicons/hypercerts-lexicons/contribution)** | `org.hypercerts.claim.contributorInformation`<br/>`org.hypercerts.claim.contribution` | Contributor identity and contribution details (two lexicons) |
| **[Attachment](/lexicons/hypercerts-lexicons/attachment)** | `org.hypercerts.context.attachment` | Supporting documentation — URLs, files, IPFS links |
| **[Measurement](/lexicons/hypercerts-lexicons/measurement)** | `org.hypercerts.context.measurement` | Quantitative data attached to a claim |
| **[Evaluation](/lexicons/hypercerts-lexicons/evaluation)** | `org.hypercerts.context.evaluation` | Third-party assessment of a claim |
| **[Collection](/lexicons/hypercerts-lexicons/collection)** | `org.hypercerts.collection` | Groups activity claims and/or other collections into a project |
| **[Rights](/lexicons/hypercerts-lexicons/rights)** | `org.hypercerts.claim.rights` | Rights associated with a hypercert |
| **[Funding Receipt](/lexicons/hypercerts-lexicons/funding-receipt)** | `org.hypercerts.funding.receipt` | Records a funding payment from one party to another |
| **[Acknowledgement](/lexicons/hypercerts-lexicons/acknowledgement)** | `org.hypercerts.context.acknowledgement` | Acceptance or rejection of a relationship |