Re: xml/cap problems

On Sat, Aug 21, 2010 at 5:53 PM, Tom Shaw <tshaw@oitc.com> wrote: > I am trying to decode and encode nws compatible cap xml. An example is at > the bottom of this post. simplexml_load_file works fine if "cap:" is removed > before processing. However, if it is not simplexml_load_file does not parse > the file at all and libxml_get_errors returns no errors. > > Any and all help is appreciated. > > Tom > > <?xml version='1.0' encoding='UTF-8' standalone='yes'?> > <cap:alert > xmlns:cap='http://www.incident.com/cap/1.0'> > <cap:identifier>NOAA-NWS-ALERTS National > 2010-08-21T13:26:34-04:00</cap:identifier> > <cap:sender>w-nws.webmaster@noaa.gov</cap:sender> > <cap:sent>2010-08-21T13:26:34-04:00</cap:sent> > <cap:status>Actual</cap:status> > <cap:msgType>Alert</cap:msgType> > <cap:scope>Public</cap:scope> > <cap:note> > Current Watches, Warnings and Advisories for the United States Issued by > the National Weather Service > </cap:note> > > <cap:references>http://www.weather.gov/alerts/us.html</cap:references> > <cap:info> > <cap:category>Met</cap:category> > <cap:event>na</cap:event> > <cap:urgency>Unknown</cap:urgency> > <cap:severity>Unknown</cap:severity> > <cap:certainty>Unknown</cap:certainty> > <cap:headline> > Current Watches, Warnings and Advisories for Alaska Issued by the National > Weather Service > </cap:headline> > > <cap:web>http://www.weather.gov/alerts/us.html#ak</cap:web> > </cap:info> > .... > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > > Hi Tom, Remember, the namespace is the uri, and the prefix is merely a short-hand: http://www.w3.org/TR/REC-xml-names/ <http://www.w3.org/TR/REC-xml-names/>When using simple xml objects, you can directly reference elements by using the namespace: http://www.sitepoint.com/blogs/2005/10/20/simplexml-and-namespaces/ <http://www.sitepoint.com/blogs/2005/10/20/simplexml-and-namespaces/>However, my preference is to use XPath capabilities, and I've processed a couple elements on your example to demonstrate how this works: $doc = <<<EOD <test xmlns:cap='http://www.incident.com/cap/1.0'> <cap:alert> <cap:identifier>NOAA-NWS-ALERTS National 2010-08-21T13:26:34-04:00</cap:identifier> <cap:sender>w-nws.webmaster@noaa.gov</cap:sender> <cap:sent>2010-08-21T13:26:34-04:00</cap:sent> <cap:status>Actual</cap:status> <cap:msgType>Alert</cap:msgType> <cap:scope>Public</cap:scope> <cap:note> Current Watches, Warnings and Advisories for the United States Issued by the National Weather Service </cap:note> <cap:references>http://www.weather.gov/alerts/us.html</cap:references> <cap:info> <cap:category>Met</cap:category> <cap:event>na</cap:event> <cap:urgency>Unknown</cap:urgency> <cap:severity>Unknown</cap:severity> <cap:certainty>Unknown</cap:certainty> <cap:headline> Current Watches, Warnings and Advisories for Alaska Issued by the National Weather Service </cap:headline> <cap:web>http://www.weather.gov/alerts/us.html#ak</cap:web> </cap:info> </cap:alert> </test> EOD; echo $doc; $cap = simplexml_load_string($doc); $cap->registerXPathNamespace('cap', 'http://www.incident.com/cap/1.0'); echo 'Message type:'.current($cap->xpath('//cap:msgType')).'<br />'; echo 'Info category:'.current($cap->xpath('//cap:info/cap:category')).'<br />'; Hope this helps, Adam -- Nephtali: PHP web framework that functions beautifully http://nephtaliproject.com