XML to Browser not a File

Question

Hi gurus,
I need your help, I am generating a XML (site map) for SEO of my apex app.
I was reading http://www.apexninjas.com/blog/f?p=100:1:0::::P1_ARTICLE:1940
This is my procedure for generate XML
create or replace PROCEDURE SITEMAP
IS
v_xml blob;
BEGIN
SELECT
XMLElement("urlset",
XMLAttributes('http://www.sitemaps.org/schemas/sitemap/0.9' as "xmlns",
'http://www.w3.org/2001/XMLSchema-instance' as "xmlns:xsi",
'http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd' as "xsi:schemaLocation"
XMLAgg(
XMLElement("url",
XMLElement("loc", 'http://myname.co/a/f?p=URL:1:0'),
XMLElement("lastmod", '2012-02-11' ),
XMLElement("changefreq",'daily'),
XMLElement("priority", '1.0'))
) .getblobval(nls_charset_id('AL32UTF8')) INTO v_xml
from dual;
owa_util.mime_header('text/xml',FALSE);
--htp.prn('Content-Disposition: attachment; filename="sitemap.xml"');
owa_util.http_header_close;
wpg_docload.download_file(v_xml);
dbms_lob.freetemporary(v_xml);
end sitemap;
and dont work
this is the error
This page contains the following errors:
error on line 10 at column 1: Extra content at the end of the document
Below is a rendering of the page up to the first error.
http://myname.co/a/f?p=URL:1:0 2012-02-11 daily 1.0
If I remove the comment --htp.prn('Content-Disposition: attachment; filename="sitemap.xml"');
it works, but generating a file xml and I need is show xml content in a browser.
Linux 6.1
APEX 4.1
Oracle SE ONE
Thanks and excuseme my English.
Oscar

Answer 1

Thanks Roel for your answer.
I dont use IE.
I do it but
Continue error
This page contains the following errors:
error on line 10 at column 1: Extra content at the end of the document
Below is a rendering of the page up to the first error.
http://mysite.cof?p=URL:1:0 2012-02-11 daily 1.0