By requesting the data from the server by using a URL similar to this, you will end up with XML similar to what is shown below.
Request
http://localhost/Astun.iShareMaps.Web/getdata.aspx?RequestType=LocalInfo&ms=Workshop/MyHouse&group=Council%20and%20Democracy|CTX1&uid=141164155969
Results
<rss version="2.0" xmlns:astun="http://www.astuntechnology.com/xsl" xmlns:georss="http://www.georss.org/georss">
<channel xmlns:astun="http://www.astuntechnology.com/xsl"
xmlns:georss="http://www.georss.org/georss" xmlns:raw="http://www.astuntechnology.com/rawxsl">
<title>CTX</title>
<link>http://localhost/astun.isharemaps.web/atmycouncil.aspx?MapSource=Workshop/AllMaps</link>
<description><![CDATA[CTX near to ]]></description>
<item>
<title>Council Tax Band RAW: A</title>
<description><![CDATA[<p><strong>Council Tax Ref:</strong><strong><a
href="somepage.aspx">005141164155969</a></strong></p><p><strong>UPRN:</strong><a
href="somepage.aspx">141164155969</a></p><p><strong>Council Tax Band:</strong>Your council tax band is
<strong>A</strong>.</p>]]></description>
<raw:description>
<raw:Council_Tax_Band>A</raw:Council_Tax_Band>
<raw:Council_Tax_Ref>005141164155969</raw:Council_Tax_Ref>
<raw:UPRN>141164155969</raw:UPRN>
</raw:description>
</item>
</channel>
</rss>
As you can see, you have the original HTML version in pink, but you then have the raw values in black, which can be accessed by using a namespaced request (e.g. /rss/channel/item/raw:description/raw:Council_Tax_Band). Also note, that the _RAW suffix that is used with Studio has been removed.