> ## Documentation Index
> Fetch the complete documentation index at: https://help.ezyid.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Relationship Hierarchy

The Ezyid Lite competency system uses the following hierarchy:

\`\`\`

Competency Library

├── Type (e.g. Induction, Pre-start, Refresher)

│   └── Category / Code

│       └── Competency

│           ├── Unique Competency ID

│           ├── Supporting Material (PDF, images, links)

│           └── Expiry Rule

│

Competency Register

├── Worker Profile

│   └── Competency Assignment

│       ├── Competency ID

│       ├── Issue Date

│       ├── Expiry Date

│       └── Evidence / Certificate

**Key rules:**

* One competency may apply to many workers.

* One worker may hold many competencies.

* A competency is valid only when it is both assigned to the worker and within its expiry window.

* The competency gateway checks the **active register record**, not just the library definition.