epub validator

[fiona86]

Hi, I posted about this in the epub section but I'm thinking that it might be more of a Calibre issue?

After I used Calibre to convert my epub and ran it through the epub validator I got this error report

ERROR: isbn.epub/content.opf(12): attribute "opf:file-as" not allowed here; expected attribute "id" or "xml:lang"

I have tried taking out the "opf:file" bits of the code but that doesn't seem to help. Here is a sample of the code

<?xml version="1.0"  encoding="UTF-8"?>
<package xmlns="http://www.idpf.org/2007/opf" version="2.0" unique-identifier="uuid_id">
  <metadata xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:opf="http://www.idpf.org/2007/opf" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:calibre="http://calibre.kovidgoyal.net/2009/metadata" xmlns:dc="http://purl.org/dc/elements/1.1/">
    <dc:creator opf:role="aut" opf:file-as="author">author</dc:creator>
<dc:creator opf:role="aut">authorl</dc:creator>
<dc:publisher>Publishers</dc:publisher>
    <meta name="calibre:series_index" content="1"/>
    <meta name="calibre:rating" content="10"/>
    <dc:description></dc:description>
    <dc:language>en</dc:language>
    <meta name="calibre:timestamp" content="2011-06-23T11:44:51.909390+00:00"/>
    <dc:title opf:file-as="title">title</dc:title>
    <meta name="cover" content="cover"/>
    <dc:date>2011-06-22T23:00:00+00:00</dc:date>
    <dc:contributor opf:role="bkp">calibre (0.7.28) [http://calibre-ebook.com]</dc:contributor>
    <dc:identifier opf:scheme="ISBN"></dc:identifier>
    <dc:identifier id="uuid_id" opf:scheme="uuid">8e4153bb-af45-4260-8c4a-ea80f95a4c2f</dc:identifier>
    <dc:subject>Thailand</dc:subject>

Any help with this would be great!

[kovidgoyal]

your version of calibre is too old.

[fiona86]

urgh, I had a feeling that was the problem. Thanks!