Hi Peter,
Basically, the XML file has two key parallelled nodes: <Topic/> and <ExternalPage/>. If there is a <link/> child existing in <Topic/>, <ExternalPage/> node will be existing for showing more detailed information about the content of this <link/> such as <d:Title/> and <d:Description/>.
However, not every <Topic/> node has one or more <link/> child, so I need to write a loop to find out if <link/> is a child of <Topic/> nodes. If there are some <link/> nodes existing, I will check each of <ExternalPages> to output more information.
<RDF> <Topic r:id="Top"> <catid>1</catid> </Topic>
<ExternalPage about=""> <topic>Top/</topic> </ExternalPage>
<Topic r:id="Top/Arts"> <catid>2</catid> </Topic>
<Topic r:id="Top/Arts/Movies/Titles/1/10_Rillington_Place">
<catid>205108</catid>
<link r:resource="http://www.britishhorrorfilms.co.uk/rillington.shtml"/>
<link r:resource="http://www.shoestring.org/mmi_revs/10-rillington-place.html"/>
</Topic>
<ExternalPage about="http://www.britishhorrorfilms.co.uk/rillington.shtml";>
<d:Title>British Horror Films: 10 Rillington Place</d:Title>
<d:Description>Review which looks at plot especially the shocking features of it.</d:Description>
<topic>Top/Arts/Movies/Titles/1/10_Rillington_Place</topic>
</ExternalPage>
<ExternalPage about="http://www.shoestring.org/mmi_revs/10-rillington-place.html";>
<d:Title>MMI Movie Review: 10 Rillington Place</d:Title>
<d:Description>Review includes plot, real life story behind the film and realism in the film.</d:Description>
<topic>Top/Arts/Movies/Titles/1/10_Rillington_Place</topic>
</ExternalPage>
</RDF>
I have put as many Twig->purge at the end of each loop. However, my problem is, when I run the program, I can hear the hardisk is being read but after a while, a Windows Memory Error pops up and the program halt. The only root I can say is <RDF/> because <Topic/> and <External/> are parallelled inside <RDF/>
Thanks again,
Nan
From: Peter Rabbitson <[EMAIL PROTECTED]> To: beginners@perl.org Subject: Re: Errors on processing 2GB XML file by using XML:Simple Date: Mon, 16 May 2005 08:08:01 -0500
> I have tried to use XML:Twig to parse a 2GB XML file instead of using
> XML:Simple, but I still got an error "The memory couldn't be written". My
> Perl is the latest and my RAM is 1GB.
Are you issuing a $twig->purge at the end of each handler? Without it memory
is not implicitly released (no garbage collection so to speak). Or maybe you
are trying to construct a twig with a malformed root and you are ending up
reading the entire file (in other words the twig does not know when to stop
until it runs out of data, or in your case runs out of memory).
Peter
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