The docs says the constructor's encoding option "Sets the default encoding for use in XML declarations."

The docs say "Prepends an XML declaration, and re-blesses the argument into a "final" class that can't be embedded." of the xml method.

The docs are wrong. The XML declaration is only prepended when conformance => 'strict' 

use XML::Generator qw( );
my $gen = XML::Generator->new(
   conformance => 'strict',
   encoding    => 'UTF-8',
);
print $gen->xml(
   $gen->doc('...')
);

[download]
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<doc>...</doc>

[download]

Did you want without strict?

Update: I just copied this from my pad. I should have made sure there wasn't anything new in the question first. I missed the bit about standalone.

In reply to Re: Getting XML::Generator to DWIW with the XML declaration by ikegami
in thread Getting XML::Generator to DWIW with the XML declaration by jeffa

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.