# Dataset Definitions

Dataset definitions describe the fields with special meaning in the Dataset.

Refer to the [Dataset Definitions](https://docs.honeycomb.io/configure/datasets/definitions/) documentation for more information.

**Honeycomb automatically creates these Dataset definition fields when the Dataset is created.** Manual creation of Dataset definitions is **not** needed.



## Set or Update Dataset Definitions

 - [PATCH /1/dataset_definitions/{datasetSlug}](https://api-docs.honeycomb.io/api/dataset-definitions/patchdatasetdefinitions.md): Set or update one or more definitions for a Dataset.
: While the PATCH payload can include the , Honeycomb does not use this field when updating Dataset Definitions.


## Get all Dataset Definitions

 - [GET /1/dataset_definitions/{datasetSlug}](https://api-docs.honeycomb.io/api/dataset-definitions/listdatasetdefinitions.md): Get all definitions for a Dataset.
The response returns an object with a Dataset Definition for each set Dataset Definition type.