hello_world.xml - Installer file

<?xml version="1.0" ?>

<mosinstall type="component">
 <name>hello_world</name>
 <creationDate>04/15/2004</creationDate>
 <author>Doyle Lewis</author>
 <copyright>This component in released under the GNU/GPL License</copyright>
 <authorEmail> This email address is being protected from spam bots, you need Javascript enabled to view it </authorEmail>
 <authorUrl>www.mambo-hosting.com</authorUrl>
 <version>1.0</version>
 <files>
  <filename>hello_world.php</filename>
 </files>
     <install>
  <queries>
   <query>DROP TABLE IF EXISTS `mos_hello_world`;</query>
   <query>CREATE TABLE `mos_hello_world` (
    `id` INT NOT NULL AUTO_INCREMENT,
    `text` TEXT NOT NULL,
    `published` TINYINT(1) NOT NULL,
    PRIMARY KEY (`id`)
    )
   </query>
  </queries>
 </install>
 <uninstall>
  <queries>
   <query>DROP TABLE IF EXISTS `mos_hello_world`;</query>
  </queries>
 </uninstall>
 <installfile>
  <filename>install.hello_world.php</filename>
 </installfile>
 <uninstallfile>
  <filename>uninstall.hello_world.php</filename>
 </uninstallfile>
   <administration>
    <menu>Hello World</menu>
    <submenu>
     <menu act="all">Show Text</menu>
    </submenu>
    <files>
      <filename>admin.hello_world.php</filename>
      <filename>admin.hello_world.html.php</filename>
      <filename>class.hello_world.php</filename>
      <filename>toolbar.hello_world.php</filename>
      <filename>toolbar.hello_world.html.php</filename>
    </files>
   </administration>
</mosinstall>

Now let's look at how the file works:

<?xml version="1.0" ?>
XML opening container. You will need this on all xml documents.

<mosinstall type="component">
Tells Mambo that it will be installing a component

 <name>hello_world</name>
 <creationDate>04/15/2004</creationDate>
 <author>Doyle Lewis</author>
 <copyright>This component in released under the GNU/GPL License</copyright>
 <authorEmail> This email address is being protected from spam bots, you need Javascript enabled to view it </authorEmail>
 <authorUrl>www.mambo-hosting.com</authorUrl>
 <version>1.0</version>
Details of the component. All of these should be in there.

 <files>
  <filename>hello_world.php</filename>
 </files>
Any files that need to be installed in the frontend of the component. Will be installed to components/com_hello_world/

 <install>
  <queries>
   <query>DROP TABLE IF EXISTS `mos_hello_world`;</query>
   <query>CREATE TABLE `mos_hello_world` (
    `id` INT NOT NULL AUTO_INCREMENT,
    `text` TEXT NOT NULL,
    `published` TINYINT(1) NOT NULL,
    PRIMARY KEY (`id`)
    )
   </query>
  </queries>
 </install>
The database queries that need to be run to properly setup te component. Creates 1 table with 3 fields. For any easy way to figure what to put here, create your table in phpMyAdmin and it will tell you the code to use.

 <uninstall>
  <queries>
   <query>DROP TABLE IF EXISTS `mos_hello_world`;</query>
  </queries>
 </uninstall>
Any database queries to run when uninstalling the component. This simply deletes the database table.

 <installfile>
  <filename>install.hello_world.php</filename>
 </installfile>
 <uninstallfile>
  <filename>uninstall.hello_world.php</filename>
 </uninstallfile>
Points to files with additional code for installing and uninstalling the component.

   <administration>
Everything after this point will be installed in the administrative end.

    <menu>Hello World</menu>
This is what will be displayed in the "Components" drop-down menu.

    <submenu>
     <menu act="all">Show Text</menu>
    </submenu>
This is the pop-out menu below your main menu. This also tells Mambo what function to run within your component.

    <files>
      <filename>admin.hello_world.php</filename>
      <filename>admin.hello_world.html.php</filename>
      <filename>class.hello_world.php</filename>
      <filename>toolbar.hello_world.php</filename>
      <filename>toolbar.hello_world.html.php</filename>
    </files>
All of the files that are to be installed into administrator/components/com_hello_world/.

   </administration>
</mosinstall>
Closes out the Mambo install.