TSQL Parse XML with namespace - tsql

Question

I'm trying to parse some xml that's stored in the database inside of stored procedure. The procedure should return 2 columns, id and value. I'm only part of the way through this, I'm stuck on the fact that I can't list even list the "Setting" nodes.
declare #PolicySettingsXml xml
set #PolicySettingsXml = '<?xml version="1.0" encoding="utf-8"?>
<Policy xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://www.myurl.com/app/Policies">
<Setting id="VendorInfo0">
<string>fsdfdsfds</string>
</Setting>
<Setting id="VendorInfo1">
<string />
</Setting>
<Setting id="VendorInfo2">
<string />
</Setting>
<Setting id="SendSurchargeAsSeparateTransaction">
<boolean>false</boolean>
</Setting>
<Setting id="VendorSurchargeInfo0">
<string />
</Setting>
<Setting id="VendorSurchargeInfo1">
<string />
</Setting>
<Setting id="VendorSurchargeInfo2">
<string />
</Setting>
</Policy>'
select T.c.query('string') as value, T.c.query('#id') as id from #PolicySettingsXml.nodes('/Policy/Setting') T(c)
I'm getting an error, "XQuery [query()]: Attribute may not appear outside of an element," I'd expect to see:
id | value
VendorInfo0 | fsdfdsfds
VendorInfo1 | <null>
VendorInfo2 | <null>
SendSurchargeAsSeparateTransaction | <null>
VendorSurchargeInfo1 | <null>
VendorSurchargeInfo2 | <null>

Answer 1

The first issue is related to syntax.
This:
from PSXML.x.nodes('/*:Policy/*:Setting') T(c);
should be:
from (VALUES(#PolicySettingsXml)) AS PSXML(x)
CROSS APPLY PSXML.x.nodes('/*:Policy/*:Setting') T(c);
For what you are doing you can use the value method for the id column.
select
id = T.c.value('(#id)[1]', 'varchar(100)'),
[value] = T.c.query('(*:string/text())[1]')
from (VALUES(#PolicySettingsXml)) AS PSXML(x)
CROSS APPLY PSXML.x.nodes('/*:Policy/*:Setting') T(c);
Note that I am cheating on the namespaces using the "all namespaces" syntax: * :Object. A google search for "sql server t-sql xml namespaces" will show you the way you're supposed to do it. I cheated due to time constraints.