Refering the ordering list sample code from richfaces online demo:
<h:form>
        <h:panelGrid columns="2" columnClasses="top 70per, top 30per" width="100%">
        <rich:orderingList value="#{library.songsList}" var="lib" listHeight="300" listWidth="350" converter="orderingListConverter" selection="#{library.selectedSongsSet}">
            <rich:column  width="180">
            <f:facet name="header">
                <h:outputText value="Song Name" />
            </f:facet> 
                <h:outputText value="#{lib.title}"></h:outputText>
            </rich:column>
            <rich:column> 
                <f:facet name="header">
                    <h:outputText value="Artist Name" />
                </f:facet>
                <h:outputText value="#{lib.album.artist.name}"></h:outputText><br/>
            </rich:column>
            <a4j:support event="onclick" ignoreDupResponses="true" requestDelay="500" action="#{library.takeSelection}" reRender="output"/>
            <a4j:support event="onkeyup" ignoreDupResponses="true" requestDelay="500" action="#{library.takeSelection}" reRender="output"/>
        </rich:orderingList>
        <rich:panel id="output" header="Current Selection" style="width:200px">
            <rich:dataList value="#{library.selectedSongsList}" var="song" rendered="#{not empty library.selectedSongsList}">
                <h:outputText value="#{song.title}"></h:outputText>
            </rich:dataList>
            <h:outputText value="No Songs Selected" rendered="#{empty library.selectedSongsList}"/>
        </rich:panel>
        </h:panelGrid>
    </h:form>What is takeSelection action defined on onclick event. Can anyone give me the implenentation of this method. I am unable to figure out how rich:orderingList gets selected rows from UI in   bean.