> For the complete documentation index, see [llms.txt](https://docs.roboflow.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.roboflow.com/workflows/developer-guide/developer-guide/kinds/zone.md).

# zone Kind

Definition of polygon zone

## Data representation

### External

External data representation is relevant for Workflows clients - it dictates what is the input and output format of data.

Type: `List[Tuple[int, int]]`

### Internal

Internal data representation is relevant for Workflows blocks creators - this is the type that will be provided by Execution Engine in runtime to the block that consumes input of this kind.

Type: `List[Tuple[int, int]]`

## Details

List of points defining polygon zone in format \[(x, y)]