The <apioperation> element is a reference to an operation.
This element can be used to reference an operation from another DITA topic type.
<task id="httpxml"> <title>Getting an XML file through an HTTP connection</title> <taskbody> <steps> <step><cm>Open the connection</cm> <info>You use <apioperation keyref="com.ibm.xtools.patterns.framework.uml2.PlugletException.notify">Notify method</apioperation> in a VB6 application.</info> </step> ... </steps> </taskbody> </task>