# Developer Guide: Initializing Angular

Initializing Angular consists of loading the `angular.js` script in your page, and specifying how Angular should process and manage the page. To initialize Angular you do the following:

- Specify the Angular namespace in the `<html>` page
- Choose which flavor of Angular script to load (debug or production)
- Specify whether or not Angular should process and manage the page automatically (`ng-app`)

The simplest way to initialize Angular is to load the Angular script and tell Angular to compile and manage the whole page. You do this as follows:

    <!doctype html>
    <html ng-app>
      <head>
        ...
      </head>
      <body>
        ...
        <script src="angular.js">
      </body>

### Specifying the Angular Namespace

        <html xmlns:ng="http://angularjs.org">

You need to add the Angular namespace declaration if you use `ng:something` style of declaring Angular directives and you write your templates as XHTML. Or when you are targeting Internet Explorer older than version 9 (because older versions of IE do not render namespace properly for either HTML or XHTML). For more info please read Internet Explorer Compatibility doc.

### Creating Your Own Namespaces

When you are ready to define your own `directive`, you may chose to create your own namespace in addition to specifying the Angular namespace. You use your own namespace to form the fully qualified name for directives that you create.

For example, you could map the alias `my` to your domain, and create a directive called `my:directive`. To create your own namespace, simply add another `xmlns` tag to your page, create an alias, and set it to your unique domain:

        <html xmlns:ng="http://angularjs.org" xmlns:my="http://mydomain.com">

### Loading the Angular Bootstrap Script

The Angular bootstrap script comes in two flavors; a debug script, and a production script:

- angular-[version].js - This is a human-readable file, suitable for development and debugging.
- angular-[version].min.js - This is a compressed and obfuscated file, suitable for use in production.

### Related Topics

- Automatic Initialization
- Manual Initialization