Magento simple Hello World extension: Extension configuration file

config.xml

/**
 * Magento simple Hello World extension: Extension configuration file
 *
 * Every Magento extension must have a config.xml that specifies
 * necessary configuration information.
 * Provided for documentation purposes in the
 * Magento 1.x Extension Developer's Guide
 * 
 * @copyright Copyright (c) 2014 eBay Inc. (http://www.magentocommerce.com)
 */


<config>
    <modules> <!-- Defines the extension class structure and version -->
        <Tutorials_Hello>
            <version>0.1</version>
        </Tutorials_Hello>
    </modules>
    <frontend>
        <routers>
            <hello>
                <use>standard</use> <!-- Extension uses the Magento standard router -->
                <args>
                    <module>Tutorials_Hello</module> <!-- Notice this matches the value under <modules> -->
                    <frontName>hello</frontName> <!-- Storefront URI used to display text -->
                </args>
            </hello>
        </routers>
        <layout>
            <updates>
                <hello>
                    <file>hello.xml</file> <!-- Extension's TBD -->
                </hello>
            </updates>
        </layout>
    </frontend>
    <global>
        <blocks>
            <hello>
                <class>Tutorials_Hello_Block</class> <!-- Extension's block -->
            </hello>
        </blocks>
    </global>
</config>