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

# Introduction

Scale's information hierarchy is comprised of [Projects](/core-resources/project), [Batches](/core-resources/batch), and [Tasks](/core-resources/task). A Project consists of Batches and Tasks. Batches are an optional entity used to group Tasks within a Project. Tasks are a unit of work that needs to be completed by a contributor.

Within a Task, labeled data is represented in a hierarchy, where each level has relevant [Annotations](/core-resources/annotation) for that level. A Task consists of [Threads](/core-resources/thread), a Thread consists of [Turns](/core-resources/turn), and a Turn consists of [Messages](/core-resources/message).

More details about Scale's information hierarchy can be found under [Core Resources](/core-resources).