Getting the value of dc:creator using SQL XML - sql

Question

I am unsure how to get the value of dc:creator from an RSS-feed using SQL.
This is my xml/rss-feed:
<rss xmlns:dc="http://purl.org/dc/elements/1.1/" version="2.0">
<channel>
<title>Foobar RSS</title>
<link>http://www.foobar.com/</link>
<description>RSS feed</description>
<language>en</language>
<ttl>15</ttl>
<item>
<title>This is my title</title>
<link>http://www.foobar.com/link/blabla</link>
<description>Bla..bla..bla..</description>
<dc:creator>John Doe</dc:creator>
<guid isPermaLink="false">00082EA751F1D905DE00E7CFA2417DA9</guid>
<pubDate>Wed, 26 Oct 2011 00:00:00 +0200</pubDate>
</item>
</channel>
</rss>
In my SQL I use something like this to get the values - e.g for pubDate I use something like this:
DECLARE #xml XML
SET #xml = cast('my rss feed here' AS xml)
SELECT
convert(datetime,substring(T.nref.value('pubDate[1]','nvarchar(100)'),6,20)) as pubdate,
FROM #xml.nodes('//item') AS T(nref)
This works fine, but when I am trying to get dc:creator value 'John Doe', the following just gives me an error:
SELECT
T.nref.value('dc:creator','nvarchar(100)') as creator
FROM #xml.nodes('//item') AS T(nref)
error:
XQuery [value()]: The name "dc" does not denote a namespace.
I need to be able to select multiple columns from the rss-feed. Can anybody provide a solution or direction to get the value of dc:creator?
I have another question - how would you construct the code if you are doing it in a sub select?
E.g.
INSERT INTO RSSResults (ID, pubDate)
SELECT #ID, tbl.pubDate FROM (
;WITH XMLNAMESPACES('http://purl.org/dc/elements/1.1/' AS dc)
SELECT
RSS.Item.value('(dc:creator)[1]', 'nvarchar(100)') as pubDate
FROM
#xml.nodes('/rss/channel/item') as RSS(Item)) AS tbl
The code breaks at ";WITH XMLNAMESPACES". Is it possible to include the namespace directly in the statement somehow?

Answer 1

Try something like this:
DECLARE #xml XML
SET #xml = cast('my rss feed here' AS xml)
;WITH XMLNAMESPACES('http://purl.org/dc/elements/1.1/' AS dc)
SELECT
#xml.value('(rss/channel/item/dc:creator)[1]', 'nvarchar(100)')
If you need to catch multiple items - try this:
DECLARE #xml XML
SET #xml = cast('my rss feed here' AS xml)
;WITH XMLNAMESPACES('http://purl.org/dc/elements/1.1/' AS dc)
SELECT
RSS.Item.value('(dc:creator)[1]', 'nvarchar(100)')
FROM
#xml.nodes('/rss/channel/item') as RSS(Item)