Order of processors?

[Damon Rand]

Hi there,
   I am wondering why the order of processors is important? In this example I want to 
put my serializer at the top of the xml file but I can't because it seems it has to go 
after the output it references??

Damon..


<p:config xmlns:p="http://www.orbeon.com/oxf/pipeline";>

        <p:processor uri="oxf/processor/request" 
xmlns:p="http://www.orbeon.com/oxf/pipeline";>
                <p:input name="config">
                        <config>
                                <include>/request/parameters</include>
                        </config>
                </p:input>
                <p:output name="data" id="request"/>
        </p:processor>

        <!-- Display xml for debugging -->
        <p:processor uri="oxf/processor/xml-serializer" 
xmlns:p="http://www.orbeon.com/oxf/pipeline";>
                <p:input name="config">
                        <config>
                                <content-type>text/xml</content-type>
                        </config>
                </p:input>
                <p:input name="data" href="#request"/>
        </p:processor>