test/java/fr/jayasoft/ivy/xml/ivyconf-macro+ref.xml

<ivyconf>
    <macrodef name="myresolver">
        <attribute name="name"/>
        <filesystem name="@{name}" m2compatible="true" checkconsistency="true" checkmodified="true" allownomd="false">
            <artifact pattern="${some.dir}/[organisation]/[module]/[revision]/[type]s/[artifact]-[revision].[ext]" />
            <ivy pattern="${some.dir}/[organisation]/[module]/[revision]/ivy.xml"/>
        </filesystem>
    </macrodef>

	<resolvers>
	   <myresolver name="shared"/>
	   <chain name="mychain">
	      <resolver ref="shared"/>
	   </chain>
	</resolvers> 
</ivyconf>