Validating System Configuration Values

<config>
    <global>
        <models>
            <namespace_module>
                <class>Namespace_Module_Model</class>
                <resourceModel>namespace_module_resource</resourceModel>
            </namespac...

<config>
    <global>
        <blocks>
            <namespace_module>
                <class>Namespace_Module_Block</class>
            </namespace_module>
        </blocks>
    </global>
</config>

![](http://m...

<config>
    <crontab>
        <jobs>
            <cron_job_name>
                <schedule>
                    <cron_expr>* * * * *</cron_expr>
                </schedule>                
                <run>

...

EAV:

<config>
    <global>
        <resources>
            <namespace_module_setup>
                <setup>
                    <module>Namespace_Module</module>
                    <class>Mage_Eav_Model_Entity_Setup</...

Frontend:

<config>
    <frontend>
        <events>
            <the_name_of_the_event_to_observe>
                <observers>
                    <namespace_module>
                        <class>namespace_module/obser...

Frontend:

<config>
    <frontend>
        <layout>
            <updates>
                <namespace_module>
                    <file>namespace-module.xml</file>
                </namespace_module>
            </up...

Frontend With Route:

<config>
    <frontend>
        <routers>
            <namespace_module>
                <use>standard</use>
                <args>
                    <module>Namespace_Module</module>
       ...

<!-- # Module Initialisation
    app/etc/modules/Namespace_ModuleName.xml -->

<config>
    <modules>
        <Namespace_ModuleName>
            <active>true</active>
            <codePool>local</codePool>
        <...

This should go in adminhtml.xml. Also see Config ACL Definition (note that the XML path of the ACL entry needs to match up with the XML path of the menu entry).

To place an entry und...

This should go in adminhtml.xml. Also see Config Menu Definition (note that the XML path of the menu entry needs to match up with the XML path of the ACL entry). To see how to impl...