<tag> define a custom tag

name

tag

xml namespace

http://moyaproject.com

Define a custom tag. A custom tag is in a callable tag that works like builtin logic tags. Here's an example of defining a custom tag:

<tag name="getstock">
    <doc>Get count of available stock</doc>
    <signature>
        <attribute name="product" />
    </signature>
    <db:get model="#Product.name == product" dst="product"/>
    <return value="product.count"/>
</tag>

You may define a custom tag anywhere in a library. Once defined, the tag is available to any code that uses the appropriate namespace defined in lib.ini. For example, if the above tag is defined in a library with an xml namespace of http://moyaproject.com/sushifinder, it could be invoked with the following file:

<moya xmlns:sushifinder="http://moyaproject.com/sushifinder">
    <macro name="main">
        <sushifinder:getstock product="tuna-roll" dst="count" />
        <echo>We have ${count} tuna rolls in stock.</echo>
    </macro>
</moya>

Custom tags are preferred over macros when exposing functionality to other libraries.