RE: :Writer beginner problems

From: Rob Hanson (rhanson_at_aptegrity.com)
Date: 02/03/04 

To: 'KEVIN ZEMBOWER' <KZEMBOWE@jhuccp.org>, beginners@perl.org
Date: Tue, 3 Feb 2004 12:46:26 -0500

> <?xml version="1.0" encoding="ISO-8859-1"?>
> <docnum>PIP 189165</docnum>
> <greeting class="simple">Hello, world!</greeting>
> ...
> Attempt to insert start tag after close of document
> element at ./test.pl line 11

A rule of XML is that there MAY ONLY BE ONE ROOT ELEMENT. You have two.

You need to put <docnum> and <greeting> inside a single element. The
following would be well-formed XML.

<?xml version="1.0" encoding="ISO-8859-1"?>
<rootTag>
  <docnum>PIP 189165</docnum>
  <greeting class="simple">Hello, world!</greeting>
</rootTag>

Rob

-----Original Message-----
From: KEVIN ZEMBOWER [mailto:KZEMBOWE@jhuccp.org]
Sent: Tuesday, February 03, 2004 12:41 PM
To: beginners@perl.org
Subject: XML::Writer beginner problems

Hope it's okay to write to this group regarding beginner problems with
XML::Writer. I'm a beginner both to XML in general, and XML::Writer in
particular.

I'm trying to run this program:
============================
#! /usr/bin/perl

use XML::Writer;

my $writer = new XML::Writer(DATA_MODE => 1,
                             DATA_INDENT => 3,
                             UNSAFE =>1);

$writer->xmlDecl("ISO-8859-1");

$writer->dataElement("docnum", "PIP 189165");
$writer->startTag("greeting",
                  "class" => "simple");
$writer->characters("Hello, world!");
$writer->endTag("greeting");

$writer->end();
============================
When I do, I get the output I think I want:
kevinz@www:~/POPLINE_XML$ ./test.pl

<?xml version="1.0" encoding="ISO-8859-1"?>

<docnum>PIP 189165</docnum>
<greeting class="simple">Hello, world!</greeting>
kevinz@www:~/POPLINE_XML$

This output looks like valid XML to me. I don't see any problems with it.

However, when I remove the UNSAFE and change the third line to:
my $writer = new XML::Writer(DATA_MODE => 1,
                             DATA_INDENT => 3);

I get this output:
kevinz@www:~/POPLINE_XML$ ./test.pl
<?xml version="1.0" encoding="ISO-8859-1"?>

Attempt to insert start tag after close of document element at ./test.pl
line 11
<docnum>PIP 189165</docnum>kevinz@www:~/POPLINE_XML$

I don't understand what I'm doing wrong to cause XML::Writer to complain. Do
I not understand XML correctly?

Thanks for your thoughts and suggestions.

-Kevin Zembower

-----
E. Kevin Zembower
Unix Administrator
Johns Hopkins University/Center for Communications Programs
111 Market Place, Suite 310
Baltimore, MD 21202
410-659-6139 

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