<rng:optional> <rng:attribute name="attachment" /> </rng:optional>
<rng:optional> <rng:attribute name="attachment_use" /> </rng:optional>
<rng:optional> <rng:attribute name="groups"/> </rng:optional>
+ <!-- `Usage` may help identify the best report for a certain task,
+ for example usage="default" for reports that are attached by
+ default in EDI exports -->
+ <rng:optional><rng:attribute name="usage"/></rng:optional>
<rng:empty />
</rng:element>
</rng:define>