DevOps, CI/CD and Automation

Hi all,
let us suppose this XML

    <measData>
        <managedElement localDn="MYNODE" ></managedElement>
        <measInfo>
            <granPeriod duration="PT900S"  endTime="2012-08-20T09:45:00+02:00" ></granPeriod>
            <repPeriod duration="PT900S" ></repPeriod>
            <measType p="1" >ColName1</measType>
            <measType p="2" >ColName2</measType>
            <measType p="3" >ColName3</measType>
            <measType p="4" >ColName4</measType>
            <measType p="5" >ColName5</measType>
            <measType p="6" >ColName6</measType>
            <measValue measObjLdn="measure1,apn=gsm" >
                <r p="1" >100</r>
                <r p="2" >200</r>
                <r p="3" >300</r>
                <r p="4" >400</r>
                <r p="5" >500</r>
                <r p="6" >600</r>
            </measValue>
            <measValue measObjLdn="measure1,apn=umts" >
                <r p="1" >10</r>
                <r p="2" >20</r>
                <r p="3" >30</r>
                <r p="4" >40</r>
                <r p="5" >50</r>
                <r p="6" >60</r>
            </measValue>
        </measInfo> 
    <measData>

I want to select all measValue <b>only if in <repPeriod> duration is "PT900S"</b>.

In PLSQL, i'm using

L_NODELIST   := DBMS_XSLPROCESSOR.SELECTNODES(DBMS_XMLDOM.MAKENODE(L_DOC), 'measData/measInfo/measValue[contains(@measObjLdn,"measure1")]');
...
     DBMS_XSLPROCESSOR.VALUEOF(L_N, '@measObjLdn', T_MYTAB(T_MYTAB.LAST).NAME);
     DBMS_XSLPROCESSOR.VALUEOF(L_N, 'r[@p="1"]/text()', T_MYTAB(T_MYTAB.LAST).COLNAME1);
     DBMS_XSLPROCESSOR.VALUEOF(L_N, 'r[@p="2"]/text()', T_MYTAB(T_MYTAB.LAST).COLNAME2);
     DBMS_XSLPROCESSOR.VALUEOF(L_N, 'r[@p="3"]/text()', T_MYTAB(T_MYTAB.LAST).COLNAME3);
     DBMS_XSLPROCESSOR.VALUEOF(L_N, 'r[@p="4"]/text()', T_MYTAB(T_MYTAB.LAST).COLNAME4);
...

I need to customize the pattern in DBMS_XSLPROCESSOR.SELECTNODES

Thanks to all

Riccardo