# Enum: RuleOrientation 




_Which way a reference line runs._



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URI: [tvbo:enum/RuleOrientation](https://w3id.org/tvbo/enum/RuleOrientation)

## Permissible Values
| Value | Meaning | Description |
| --- | --- | --- |
| horizontal | None | Constant y, at a single value |
| vertical | None | Constant x, at a single value |
| diagonal | None | Slope and intercept — the identity line `[1, 0]` a target-versus-simulated pa... |













## Identifier and Mapping Information





### Schema Source


* from schema: https://w3id.org/tvbo/figure






## LinkML Source

<details>
```yaml
name: RuleOrientation
description: Which way a reference line runs.
from_schema: https://w3id.org/tvbo/figure
permissible_values:
  horizontal:
    text: horizontal
    description: Constant y, at a single value.
  vertical:
    text: vertical
    description: Constant x, at a single value.
  diagonal:
    text: diagonal
    description: Slope and intercept — the identity line `[1, 0]` a target-versus-simulated
      panel is read against.

```
</details>

</div>