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

# Relationships

> Semantic relationship model connecting concepts and topics across The Blockchain Library.

## Explicit graph edges

The Knowledge Engine stores relationships separately from page prose so that software can understand how concepts connect.

```json theme={null}
{
  "from": "defi",
  "to": "smart-contract",
  "type": "depends-on"
}
```

## Supported relationship types

| Type               | Meaning                                                   |
| ------------------ | --------------------------------------------------------- |
| `related-to`       | General semantic relationship                             |
| `prerequisite-for` | One concept should generally be understood before another |
| `part-of`          | A concept is a component or subset of another             |
| `used-by`          | A concept or mechanism is used by another                 |
| `secured-by`       | A concept depends on another for security                 |
| `implemented-by`   | A concept is operationally implemented by another         |
| `depends-on`       | One concept relies on another                             |
| `contrasts-with`   | Useful comparison or opposing model                       |

## Future uses

Relationships can power related-topic cards, contextual navigation, graph visualizations, AI retrieval expansion, quiz generation, and prerequisite-aware learning recommendations.