X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FText%2FTradition%2FParser%2FGraphML.pm;h=4e191a45d9ed34d706f76c444fb378d735140cb0;hb=f6066bac61bc5609c60d48df17aad924c8944177;hp=54a2c3222948ed58e12b6419629c8fa0e0c662cc;hpb=9463b0bff2afe6185d9bdfda49ce9c9cdc176049;p=scpubgit%2Fstemmatology.git

diff --git a/lib/Text/Tradition/Parser/GraphML.pm b/lib/Text/Tradition/Parser/GraphML.pm
index 54a2c32..4e191a4 100644
--- a/lib/Text/Tradition/Parser/GraphML.pm
+++ b/lib/Text/Tradition/Parser/GraphML.pm
@@ -75,7 +75,7 @@ sub parse {
 	foreach my $dkey ( keys %$nodedata ) {
 	    my $keyname = $nodedata->{$dkey};
 	    my $keyvalue = _lookup_node_data( $n, $dkey );
-	    $node_hash->{$keyname} = $keyvalue if $keyvalue;
+	    $node_hash->{$keyname} = $keyvalue if defined $keyvalue;
 	}
 	$node_reg->{$n->getAttribute( 'id' )} = $node_hash;
 	push( @{$graph_hash->{'nodes'}}, $node_hash );