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

# Architecture and Technology Stack

export const LwTemplate = ({title = "Key questions to get you started", icon = "sparkles", cta = "Powered by Agent Studio", linkHref = "https://lucidworks.com/demo/?utm_source=docs&utm_medium=referral&utm_campaign=docs_cta_ai"}) => {
  const [isLoaded, setIsLoaded] = useState(false);
  useEffect(() => {
    const timer = setTimeout(() => {
      setIsLoaded(true);
    }, 500);
    return () => clearTimeout(timer);
  }, []);
  return <div className="lw-template-container">
      <Card title={title} icon={icon}>
        {isLoaded && <span dangerouslySetInnerHTML={{
    __html: `<lw-template id="a029c1a9-28be-427e-b0e1-5d918920246a"></lw-template
            >`
  }} />}
        <Link href={linkHref} className="agent-studio-link text-left text-gray-600 gap-2 dark:text-gray-400 text-sm font-medium flex flex-row items-center hover:text-primary dark:hover:text-primary-light group-hover:text-primary group-hover:dark:text-primary-light">Powered by Lucidworks Agent Studio</Link>
      </Card>
    </div>;
};

[localhost link]: http://localhost:3000/docs/4/app-studio/concepts/overview/architecture

[old doc.lw link]: https//doc.lucidworks.com/app-studio/4.2/3118

[mintlify link]: https://doc.lucidworks.com/docs/4/app-studio/concepts/overview/architecture

Appkit is a stateless, modular, 100% Java Standard Edition software framework.

<LwTemplate />

## Architecture

Appkit consists of:

* A layer of [data-abstraction middleware](/docs/4/app-studio/concepts/overview/data-sources)
* A collection of functional [modules](/docs/4/app-studio/reference/modules/overview) for data manipulation
* [User interface components](/docs/4/app-studio/concepts/overview/ui-components) for rendering and visualizing the data

An Appkit search application consists of modular building blocks, which are pieced together through the use of special [Appkit tags](/docs/4/app-studio/concepts/overview/appkit-tags), which can be mixed in with standard HTML and JSP code.

<img src="https://mintcdn.com/lucidworks/J_LymSfRoWq3UOvg/assets/images/appkit/4.2/architecture.png?fit=max&auto=format&n=J_LymSfRoWq3UOvg&q=85&s=0e3f20b379388c7d3330f321ff5ba707" alt="architecture diagram" width="1314" height="929" data-path="assets/images/appkit/4.2/architecture.png" />

## Technology stack

The Appkit stack is designed to be lightweight from the point of view of efficiency and ease of development. No programming or Java code is necessary to build a search application with Appkit.

### Software that Appkit uses

Appkit uses:

* Maven for server side dependencies and build management
* npm 9.0.2 for client side dependencies
* Standard Java 1.8 Servlets and JSPs
* Standards-compliant AngularJS, HTML, CSS, and JavaScript

### What Appkit provides

Appkit provides:

* A self-service application generator for project generation
* AngularJS based tag libraries for all framework components
* Web services to expose all search functionality
* Extension points for custom tags, JavaScript, and CSS

### Deployment options

Appkit applications can be:

* Deployed locally in a development environment using the Maven Jetty plugin
* Built to a standard WAR file for deployment on Tomcat (or any other servlet container/application server)