If you have many attributes then consider map and grep

#!/usr/bin/perl
use strict;
use XML::Writer;

my $writer = XML::Writer->new();
my %obj = (
 Type   => 'Information',
 Phone  => 0,
 Email  => '',
);

my %attr = map  { $_ => $obj{$_} }
           grep { length $obj{$_} } keys %obj;

$writer->startTag("Contact",%attr);

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poj

In reply to Re^3: XML::Write challenges by poj
in thread XML::Write challenges by denzilhere

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