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

# SpanType

> Allowed values for the `fiddler.span.type` attribute.

Allowed values for the `fiddler.span.type` attribute.

## Values

| Constant | Value     | Description                      |
| -------- | --------- | -------------------------------- |
| `AGENT`  | `"agent"` | An autonomous agent span.        |
| `CHAIN`  | `"chain"` | A chain or workflow span.        |
| `LLM`    | `"llm"`   | An LLM generation span.          |
| `OTHER`  | `"other"` | An uncategorized span.           |
| `TOOL`   | `"tool"`  | A tool/function invocation span. |