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

# Span

***

# Type Alias: Span

```ts theme={null}
type Span = WorkflowSpan | LlmSpan | RetrieverSpan | ToolSpan;
```

Defined in: [src/types/logging/span.types.ts](https://github.com/rungalileo/galileo-js/blob/main/src/types/logging/span.types.ts)