> Portal Navigation:
> 
> - Append `.md` to any URL under `https://dev.wix.com/docs/` to get its markdown version.
> - Pages are either content pages (article or reference text) or menu pages (a list of links to child pages).
> - To get a menu page, truncate any URL to a parent path and append `.md` (e.g. `https://dev.wix.com/docs/sdk.md`, `https://dev.wix.com/docs/sdk/core-modules.md`).
> - Top-level index of all portals: https://dev.wix.com/docs/llms.txt
> - Full concatenated docs: https://dev.wix.com/docs/llms-full.txt

## Resource: About the SDK Documentation

## Article: About the SDK Documentation

## Article Link: https://dev.wix.com/docs/sdk/articles/get-started/about-the-sdk-documentation.md

## Article Content:

# About the SDK Documentation

Use this guide to find different types of SDK content across the documentation portals.

## What's in the SDK reference

The [SDK reference](https://dev.wix.com/docs/sdk.md) contains items that are specific to the JavaScript SDK and don't have REST API equivalents:

- **Core modules:** Essential functionality for interacting with the Wix platform such as authentication and client setup.
- **Host modules:** APIs that allow you to interact with a Wix site when writing code for frontend environments such as the dashboard, editor, or site.
- **Frontend modules:** Frontend APIs for interacting with Wix sites and their features directly from the browser.
- **Business solutions:** Extensions and integrations such as dashboard plugins and dashboard pages, and specific backend APIs such as Data Items.

## What's in the unified API reference

Service plugins and nearly all backend APIs have moved to the [unified API reference](https://dev.wix.com/docs/api-reference.md).

## When to use the SDK reference
Use the SDK reference when you need:
- Frontend JavaScript APIs for browser environments.
- Core SDK setup and configuration.
- Host-specific functionality like dashboard or editor integration.
- Dashboard plugins and custom dashboard pages.
- Select backend APIs, for example Data Items.

## When to use the unified API reference  
Use the unified API reference when you need:
- Backend business logic and site operations.
- Service plugins for custom integrations.
- Cross-platform functionality that works with both REST and SDK.