# Datasets **Description**: Explains the concept of dataset objects in Valohai, and how they're used in experiments and pipelines. Datasets are **immutable** collections of files. You can **create new versions** of datasets, (optionally) based on previous ones, but **you cannot change** the existing ones.\ This offers full reproducibility, in the terms of the data used for training (or executions in general) - results produced by the execution in which datasets are used as a method of selecting the input files, will always yield the same results. In this section you can learn how to: * [Create and Manage Datasets](/data/datasets/creating-datasets.md) * [Create new Versions](/data/datasets/update-datasets.md) * [Package Datasets](/data/datasets/package-datasets.md) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.valohai.com/data/datasets.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.