arrays - Cannot access all XML elements PERL -

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i have simple perl script can parse downloaded xml file server. problem array have made seems store first set of tags.

here code:

sub test_button_func() {  $ua->cookie_jar($cookie_jar); # make request  $server_endpoint = "server_url_link"; $server_endpoint =~ s/\%id\%/$user/g;  # set custom http request header fields $req = http::request->new(get => $server_endpoint); $req->header('content-type' => 'application/json');  $parser = shift; $resp = $ua->request($req);  if ($resp->is_success) {      # xml response received jazz api.     $message = $resp->decoded_content;      # parse xml downloaded here:     # create object     $xml = new xml::simple;      # read xml file     @data = $xml->xmlin($message);     $arraysize = scalar (@data);      # print out data need     (my $num = 0; $num <= ($arraysize - 1); $num++) {         print @data[0]->{'oslc_disc:entry'}[$num]{'oslc_disc:serviceprovider'}{'dc:title'};         print "\n";     } }  else {     print "http error code: ", $resp->code, "\n";     print "http error message: ", $resp->message, "\n";     print $resp->decoded_content; } }

the xml try parse this:

<oslc_disc:entry>  <oslc_disc:serviceprovider>      <dc:title>url main title</dc:title>     <oslc_disc:details rdf:resource="url link"/>     <oslc_disc:services rdf:resource="url link"/>     <jfs_proc:consumerregistry rdf:resource="url link"/>  </oslc_disc:serviceprovider>  </oslc_disc:entry>

so point can parse first "oslc_disc" entry. there more 1 of in xml file. how parse rest?

do not use xml library parse rdf. cause world of pain.

also, don't use xml::simple anything, ever.

rdf::trine current state of art rdf in perl. attean being written replace it, lighter weight, , should offer nicer api, not ready yet.

example using rdf::trine

use strict; use warnings; use rdf::trine;  # $base resolving relative urls. $base = 'http://example.com/';  # parse data $model $parser = rdf::trine::parser::rdfxml->new; $model  = rdf::trine::model->new; $parser->parse_file_into_model($base, \*data, $model);  # namespaces querying data... $oslc = rdf::trine::namespace->new('http://open-services.net/xmlns/discovery/1.0/'); $dc   = rdf::trine::namespace->new('http://purl.org/dc/terms/');  # cycle through objects of oscl_disc:entry $provider ( $model->objects(undef, $oslc->entry) ) {      # title. returns list of titles, call     # in list context , first result.     ($title) = $model->objects($provider, $dc->title);      # print it.     print "got: ", $title->literal_value, "\n"; }  __data__ <oslc_disc:serviceprovidercatalog     xmlns:oslc_disc="http://open-services.net/xmlns/discovery/1.0/"     xmlns:dc="http://purl.org/dc/terms/"     xmlns:jfs_proc="https://jazz.net/xmlns/prod/jazz/process/1.0/"     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"     rdf:about="https://localhost:9443/ccm/oslc-scm/catalog.xml" >     <oslc_disc:entry>         <oslc_disc:serviceprovider>             <dc:title>foo bar baz</dc:title>             <oslc_disc:details rdf:resource="foo"/>             <oslc_disc:services rdf:resource="bar"/>             <jfs_proc:consumerregistry rdf:resource="baz"/>         </oslc_disc:serviceprovider>     </oslc_disc:entry>     <oslc_disc:entry>         <oslc_disc:serviceprovider dc:title="foo bar baz ii">             <oslc_disc:details rdf:resource="foo2"/>             <oslc_disc:services rdf:resource="bar2"/>             <jfs_proc:consumerregistry rdf:resource="baz2"/>         </oslc_disc:serviceprovider>     </oslc_disc:entry> </oslc_disc:serviceprovidercatalog>

example using attean

i've not used attean yet, there may more elegant ways of doing this...

use strict; use warnings; use attean::rdf qw(iri);  # $base resolving relative urls. $base = 'http://example.com/';  # parse data $model $store  = attean->get_store('memory')->new; $model  = attean::mutablequadmodel->new( store => $store ); $data   = { local $/; <data> };  # slurp filehandle string $model->load_triples(rdfxml => iri($base), $data);  # namespaces querying data... $oslc = 'http://open-services.net/xmlns/discovery/1.0/'; $dc   = 'http://purl.org/dc/terms/';  # cycle through objects of oscl_disc:entry $provider ( $model->objects(undef, iri("${oslc}entry"))->elements ) {      # title. returns list of titles, call     # in list context , first result.     ($title) = $model->objects($provider, iri("${dc}title"))->elements;      # print it.     print "got: ", $title->value, "\n"; }  __data__ <oslc_disc:serviceprovidercatalog     xmlns:oslc_disc="http://open-services.net/xmlns/discovery/1.0/"     xmlns:dc="http://purl.org/dc/terms/"     xmlns:jfs_proc="https://jazz.net/xmlns/prod/jazz/process/1.0/"     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"     rdf:about="https://localhost:9443/ccm/oslc-scm/catalog.xml" >     <oslc_disc:entry>         <oslc_disc:serviceprovider>             <dc:title>foo bar baz</dc:title>             <oslc_disc:details rdf:resource="foo"/>             <oslc_disc:services rdf:resource="bar"/>             <jfs_proc:consumerregistry rdf:resource="baz"/>         </oslc_disc:serviceprovider>     </oslc_disc:entry>     <oslc_disc:entry>         <oslc_disc:serviceprovider dc:title="foo bar baz ii">             <oslc_disc:details rdf:resource="foo2"/>             <oslc_disc:services rdf:resource="bar2"/>             <jfs_proc:consumerregistry rdf:resource="baz2"/>         </oslc_disc:serviceprovider>     </oslc_disc:entry> </oslc_disc:serviceprovidercatalog>

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