xml数据如下：

<test>
    <Step TestResultInfo=" " TestElapsedTimeSec="0" TestResult="Pass" StepNumber="1" GUIResponseTime="0" TestDateTimeStarted="11/20/2012 11:01:14 PM" StepDescription="Ampere CMQMR -- Map CMQMR Driver" StepName="ProcMapCMQMRDriver_Foxconn"/>
    <Step TestResultInfo=" " TestElapsedTimeSec="0" TestResult="Pass" StepNumber="2" GUIResponseTime="0" TestDateTimeStarted="11/20/2012 11:01:14 PM" StepDescription="Factory CIM check" StepName="ProcCheckFactoryCIMSetup_Foxconn"/>
    -<Step TestResultInfo=" " TestElapsedTimeSec="1" TestResult="Pass" StepNumber="3" GUIResponseTime="0.14" TestDateTimeStarted="11/20/2012 11:01:14 PM" StepDescription="Establish Connection" StepName="ProcSetVerifyCommunication">
        +<DataLog TestResult="PASS" TableName="ccProcSetVerifyCommunicationRes">
    </Step>
</test>

我试着这样做：
注册pigbank.jar
然后用xmlloader加载 data = LOAD '/tmp/xmldatademo.xml' USING XMLLoader('Step') AS (Step:chararray); 如何获取详细属性？