Is there a decent way how a XML document (XML::LibXML::Document) can be serialized ($doc->toString) with diacritics (non ISO-8859-1?) characters turned into Unicode entities? If the document comes from parsing XML without heading it occurs naturally. 
use XML::LibXML;
my $str = "<flower>r\x{16f}\x{17e}e</flower>"; 
my $doc = XML::LibXML->new->parse_string($str);
warn "Document ", $doc->toString, "\n";
warn "Encoding ", $doc->encoding, "\n";

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yields 
Document <?xml version="1.0"?>
<flower>r&#x16F;&#x17E;e</flower> 

Encoding

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The only way to achieve this effect on already parsed document which I found is to set the encoding to ISO-8859-1 (since I cannot "reset" the encoding). 
$doc->setEncoding('iso-8859-1')

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use XML::LibXML;
my $str = '<?xml version="1.0" encoding="utf8"?>'
    . "<flower>r\x{16f}\x{17e}e</flower>";
my $doc = XML::LibXML->new->parse_string($str);
warn "Document ", $doc->toString, "\n";
warn "Encoding ", $doc->encoding, "\n\n";

$doc->setEncoding('iso-8859-1');
warn "Document ", $doc->toString, "\n";
warn "Encoding ", $doc->encoding, "\n";

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yields 
Document <?xml version="1.0" encoding="utf8"?>
<flower>r&#313;&#379;&#313;že</flower>

Encoding utf8

Document <?xml version="1.0" encoding="iso-8859-1"?>
<flower>r&#367;&#382;e</flower>

Encoding iso-8859-1

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Does this method have any danger or drawback? Is there a better way how to "clear" the encoding? I would find it very useful since the serialized text with entities is imune against any encoding changes when stored to database (Oracle). Thanks, Roman

In reply to XML::LibXML document serialized with diacritics as unicode entities by roman

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