hi all, Below is the xml I want to parse with XPath, however, I met some problems with both XML::XPath and XML::LibXML;

<?xml version="1.0" encoding="UTF-8"?> 
<feed xmlns="http://www.w3.org/2005/Atom" xmlns:db="http://www.douban.
+com/xmlns/" xmlns:gd="http://schemas.google.com/g/2005" 
xmlns:opensearch="http://a9.com/-/spec/opensearchrss/1.0/"> 
<title>friends</title> 
<author> 
<link href="http://api.douban.com/people/ahbei" rel="self"/> 
<link href="http://www.douban.com/people/ahbei/" rel="alternate"/> 
<link href="http://t.douban.com/icon/u1000001-14.jpg" rel="icon"/> 
<name>ahbei</name> 
<uri>http://api.douban.com/people/1000001</uri> 
</author> 
<opensearch:startIndex>1</opensearch:startIndex> 
<opensearch:itemsPerPage>2</opensearch:itemsPerPage> 
<opensearch:totalResults>114</opensearch:totalResults> 
<entry> 
<id>http://api.douban.com/people/1010394</id> 
<title>Engo</title> 
<link href="http://api.douban.com/people/1010394" rel="self"/> 
<link href="http://www.douban.com/people/akin/" rel="alternate"/> 
<link href="http://t.douban.com/icon/u1010394-10.jpg" rel="icon"/> 
<link href="http://www.halfull.cn" rel="homepage"/> 
<content> 
http://www.douban.com/group/topic/3750385/ 
</content> 
<db:location id="beijing">beijing</db:location> 
<db:uid>akin</db:uid> 
</entry> 
<entry> 
<id>http://api.douban.com/people/1276180</id> 
<title>wo</title> 
<link href="http://api.douban.com/people/1276180" rel="self"/> 
<link href="http://www.douban.com/people/movie007wn/" rel="alternate"/
+> 
<link href="http://t.douban.com/icon/u1276180-40.jpg" rel="icon"/> 
<content> 
??????????????? 
</content> 
<db:location id="beijing">beijing</db:location> 
<db:uid>movie007wn</db:uid> 
</entry> 
</feed>
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Here is the XML::XPath code:

my $xml = XML::XPath->new( xml => $string); 
my $nodeset = $xml->findnodes('//entry'); 
foreach my $node ( $nodeset->get_nodelist){ 
print $node->findvalue('//title'),"\n"; 
}
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I got
friendsEngowo
friendsEngowo
which are all the title nodes of this xml, it seems like each $node has all the information of this XML. Dose any one knows what the problem is?

Then I try to use XML::LibXML instead, here is the code

my $xml = XML::LibXML->new->parse_string( $string); 
my @nodeset = $xml->find('//entry'); 
print Dumper @nodeset;
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I got
$VAR1 = bless( [], 'XML::LibXML::NodeList' );
which means I got nothing, entry nodes for this xml are not found. Then some guy told me I have to register the namespace for this xml. so I used this code:

my $node = XML::LibXML->new->parse_string($string);
my $xml = XML::LibXML::XPathContext->new( $node);
$xml->registerNs('atom','http://www.w3.org/2005/Atom');
my @nodeset = $xml->findnodes('//atom:entry');
print $xml->findvalue('//atom:id',$nodeset[0]);
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and it returned:
http://api.douban.com/people/1010394http://api.douban.com/people/1276180

which have both two ID tags for the first entry node. It really drives me crazy. Can anybody help me?