Glossary

Short definitions of IXO and Qi terms with links to detailed documentation.

Use this page to disambiguate vocabulary used across guides and API docs. For stack positioning, read Core concepts and Product and SDK map.

Identity and trust

Decentralized Identifier (DID)

Stable identifier for an entity, often in the did:ixo: namespace; see Identity and credentials.

Domain (entity domain)

Standard registration for a digital twin: DID, type, protocol, controllers, metadata; see Core concepts — Domains and Entity domains.

Digital twin

The modeled counterpart of a real-world subject on the stack; see Digital twins.

Claim

Structured assertion with evidence, evaluated under protocol rules; see Claims.

Verifiable credential (VC)

Issuer-signed, verifier-checkable credential about a subject DID; see Credential issuance.

Controller

Party authorized to update a DID document or domain record within protocol rules; see Identity and credentials.

Organizations and workflows

POD

Programmable organizational domain—a secure place for people, agents, and services to cooperate; see PODs.

Flow

Governed sequence of steps coordinating work; see Core concepts and user guides such as Build a flow.

Blueprint

Reusable protocol template (rules, rubrics, evidence expectations); see Build a blueprint.

Oracle

Verification, measurement, or decision-support capability—often AI-assisted; see IXO Oracles and Oracle architecture.

APIs and infrastructure

API surface

A concrete interface family (for example RPC or a specific REST service); see API introduction.

Protocol gateway

Node-level access to IXO Protocol state and transactions (RPC, REST over gRPC); compare the matrix in API introduction.

Service API

Operator-hosted HTTP or GraphQL services over indexed or app-layer data (Blocksync, Registry, Matrix state bot, USSD); auth varies by deployment (Authentication matrix).

Blocksync

Indexed query layer for chain-derived data; see IXO Blocksync and Blocksync GraphQL API.

IXO Matrix

Encrypted cooperation and data-room layer; see IXO Matrix.

Registry

Application API for Impact Hub Registry workflows; see Registry and Registry API.

Cooperation layer

Qi

Intelligent cooperating system over IXO-backed state—workspaces, tools, governed automation; see Qi.

IXO Graph

Model of connected verifiable state; see IXO Graph.

Roles (human-facing)

High-level roles (Developer, Evaluator, Funder, and others) are described in Your role. Use that page when deciding who submits claims, who verifies, and who funds programs.