xpath on simplexml object returns nothing











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I have the following XML structure:



<?xml version="1.0" encoding="utf-8"?>
<q:quakeml xmlns="http://quakeml.org/xmlns/bed/1.2" xmlns:q="http://quakeml.org/xmlns/quakeml/1.2" xmlns:catalog="http://anss.org/xmlns/catalog/0.1">
<eventParameters publicID="static">
<event catalog:eventsource="rt">
</event>
<event catalog:eventsource="rt">
</event>
<event catalog:eventsource="rt">
</event>
</eventParameters>
</q:quakeml>


I am using the following code which builds a simplexml object and attempts to extract all the event objects using an xpath query:



$se = simplexml_import_dom($dom);
$se->registerXPathNamespace('q', 'http://quakeml.org/xmlns/quakeml/1.2');
$se->registerXPathNamespace('c', 'http://anss.org/xmlns/catalog/0.1');
$events = $se->xpath('//event');


Obviously this does not work but what am I doing wrong. How to fetch all event objects from this structure?










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    up vote
    0
    down vote

    favorite












    I have the following XML structure:



    <?xml version="1.0" encoding="utf-8"?>
    <q:quakeml xmlns="http://quakeml.org/xmlns/bed/1.2" xmlns:q="http://quakeml.org/xmlns/quakeml/1.2" xmlns:catalog="http://anss.org/xmlns/catalog/0.1">
    <eventParameters publicID="static">
    <event catalog:eventsource="rt">
    </event>
    <event catalog:eventsource="rt">
    </event>
    <event catalog:eventsource="rt">
    </event>
    </eventParameters>
    </q:quakeml>


    I am using the following code which builds a simplexml object and attempts to extract all the event objects using an xpath query:



    $se = simplexml_import_dom($dom);
    $se->registerXPathNamespace('q', 'http://quakeml.org/xmlns/quakeml/1.2');
    $se->registerXPathNamespace('c', 'http://anss.org/xmlns/catalog/0.1');
    $events = $se->xpath('//event');


    Obviously this does not work but what am I doing wrong. How to fetch all event objects from this structure?










    share|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I have the following XML structure:



      <?xml version="1.0" encoding="utf-8"?>
      <q:quakeml xmlns="http://quakeml.org/xmlns/bed/1.2" xmlns:q="http://quakeml.org/xmlns/quakeml/1.2" xmlns:catalog="http://anss.org/xmlns/catalog/0.1">
      <eventParameters publicID="static">
      <event catalog:eventsource="rt">
      </event>
      <event catalog:eventsource="rt">
      </event>
      <event catalog:eventsource="rt">
      </event>
      </eventParameters>
      </q:quakeml>


      I am using the following code which builds a simplexml object and attempts to extract all the event objects using an xpath query:



      $se = simplexml_import_dom($dom);
      $se->registerXPathNamespace('q', 'http://quakeml.org/xmlns/quakeml/1.2');
      $se->registerXPathNamespace('c', 'http://anss.org/xmlns/catalog/0.1');
      $events = $se->xpath('//event');


      Obviously this does not work but what am I doing wrong. How to fetch all event objects from this structure?










      share|improve this question













      I have the following XML structure:



      <?xml version="1.0" encoding="utf-8"?>
      <q:quakeml xmlns="http://quakeml.org/xmlns/bed/1.2" xmlns:q="http://quakeml.org/xmlns/quakeml/1.2" xmlns:catalog="http://anss.org/xmlns/catalog/0.1">
      <eventParameters publicID="static">
      <event catalog:eventsource="rt">
      </event>
      <event catalog:eventsource="rt">
      </event>
      <event catalog:eventsource="rt">
      </event>
      </eventParameters>
      </q:quakeml>


      I am using the following code which builds a simplexml object and attempts to extract all the event objects using an xpath query:



      $se = simplexml_import_dom($dom);
      $se->registerXPathNamespace('q', 'http://quakeml.org/xmlns/quakeml/1.2');
      $se->registerXPathNamespace('c', 'http://anss.org/xmlns/catalog/0.1');
      $events = $se->xpath('//event');


      Obviously this does not work but what am I doing wrong. How to fetch all event objects from this structure?







      php xml xpath simplexml






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 20 at 14:53









      Liviu

      3571517




      3571517
























          1 Answer
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          As you have a default namespace for your document (xmlns="http://quakeml.org/xmlns/bed/1.2") you will need to register that and use a prefix to all elements which don't have a specific namespace prefix...



          $se->registerXPathNamespace('d', 'http://quakeml.org/xmlns/bed/1.2');
          $events = $se->xpath('//d:event');


          I tend to use d - but you can use anything as long as you use the same thing in your XPath.






          share|improve this answer





















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            1 Answer
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            active

            oldest

            votes








            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes








            up vote
            1
            down vote



            accepted










            As you have a default namespace for your document (xmlns="http://quakeml.org/xmlns/bed/1.2") you will need to register that and use a prefix to all elements which don't have a specific namespace prefix...



            $se->registerXPathNamespace('d', 'http://quakeml.org/xmlns/bed/1.2');
            $events = $se->xpath('//d:event');


            I tend to use d - but you can use anything as long as you use the same thing in your XPath.






            share|improve this answer

























              up vote
              1
              down vote



              accepted










              As you have a default namespace for your document (xmlns="http://quakeml.org/xmlns/bed/1.2") you will need to register that and use a prefix to all elements which don't have a specific namespace prefix...



              $se->registerXPathNamespace('d', 'http://quakeml.org/xmlns/bed/1.2');
              $events = $se->xpath('//d:event');


              I tend to use d - but you can use anything as long as you use the same thing in your XPath.






              share|improve this answer























                up vote
                1
                down vote



                accepted







                up vote
                1
                down vote



                accepted






                As you have a default namespace for your document (xmlns="http://quakeml.org/xmlns/bed/1.2") you will need to register that and use a prefix to all elements which don't have a specific namespace prefix...



                $se->registerXPathNamespace('d', 'http://quakeml.org/xmlns/bed/1.2');
                $events = $se->xpath('//d:event');


                I tend to use d - but you can use anything as long as you use the same thing in your XPath.






                share|improve this answer












                As you have a default namespace for your document (xmlns="http://quakeml.org/xmlns/bed/1.2") you will need to register that and use a prefix to all elements which don't have a specific namespace prefix...



                $se->registerXPathNamespace('d', 'http://quakeml.org/xmlns/bed/1.2');
                $events = $se->xpath('//d:event');


                I tend to use d - but you can use anything as long as you use the same thing in your XPath.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Nov 20 at 15:01









                Nigel Ren

                24.3k61832




                24.3k61832






























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