The xbrlrss feed that comes from the sec looks something like:

<?xml version="1.0" encoding="windows-1252"?>
<rss version="2.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:rss="http://purl.org/rss/1.0/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
  <channel rdf:about="http://www.sec.gov/Archives/edgar/xbrl.html">
    <title>XBRL Data Submitted in the XBRL Voluntary Program on EDGAR</title>
    <link>http://www.sec.gov/Archives/edgar/xbrl.html</link>
    <description>This listing contains all filings containing XBRL as of the previous official filing date.</description>
    <language>en-us</language>
    <pubDate>Tue, 26 Jun 2007 00:00:00 EST</pubDate>
    <lastBuildDate>Tue, 26 Jun 2007 00:00:00 EST</lastBuildDate>
    <item rdf:about="http://www.sec.gov/Archives/edgar/data/1166691/000119312507140058/0001193125-07-140058-index.htm">
      <title>COMCAST CORP (0001166691) (Filer)</title>
      <link>http://www.sec.gov/Archives/edgar/data/1166691/000119312507140058/0001193125-07-140058-index.htm</link>
      <description>8-K</description>
      <pubDate>Thu, 21 Jun 2007 17:15:52 EST</pubDate>
      <edgar:xbrlFiling xmlns:edgar="http://www.sec.gov/Archives/edgar">
        <edgar:companyName>COMCAST CORP</edgar:companyName>
        <edgar:formType>8-K</edgar:formType>
        <edgar:filingDate>06/21/2007</edgar:filingDate>
        <edgar:cikNumber>0001166691</edgar:cikNumber>
        <edgar:accessionNumber>0001193125-07-140058</edgar:accessionNumber>
        <edgar:fileNumber>001-32871</edgar:fileNumber>
        <edgar:xbrlFiles>
          <edgar:xbrlFile sequence="1" file="d8k.htm" type="8-K" size="13529" description="FORM 8-K" url="http://www.sec.gov/Archives/edgar/data/1166691/000119312507140058/d8k.htm" />
          <edgar:xbrlFile sequence="2" file="cmcsa-20070331.xml" type="EX-100.INS" size="39783" description="XBRL INSTANCE DOCUMENT" url="http://www.sec.gov/Archives/edgar/data/1166691/000119312507140058/cmcsa-20070331.xml" />
          <edgar:xbrlFile sequence="3" file="cmcsa-20070331.xsd" type="EX-100.SCH" size="7709" description="XBRL TAXONOMY EXTENSION SCHEMA" url="http://www.sec.gov/Archives/edgar/data/1166691/000119312507140058/cmcsa-20070331.xsd" />
          <edgar:xbrlFile sequence="4" file="cmcsa-ssu_xbrl.xsd" type="EX-100.SCH-1" size="552" description="XBRL TAXONOMY EXTENSION SCHEMA" url="http://www.sec.gov/Archives/edgar/data/1166691/000119312507140058/cmcsa-ssu_xbrl.xsd" />
          <edgar:xbrlFile sequence="5" file="cmcsa-20070331_cal.xml" type="EX-100.CAL" size="80922" description="XBRL TAXONOMY EXTENSION CALCULATION LINKBASE" url="http://www.sec.gov/Archives/edgar/data/1166691/000119312507140058/cmcsa-20070331_cal.xml" />
          <edgar:xbrlFile sequence="6" file="cmcsa-20070331_lab.xml" type="EX-100.LAB" size="63346" description="XBRL TAXONOMY EXTENSION LABEL LINKBASE" url="http://www.sec.gov/Archives/edgar/data/1166691/000119312507140058/cmcsa-20070331_lab.xml" />
          <edgar:xbrlFile sequence="7" file="cmcsa-20070331_pre.xml" type="EX-100.PRE" size="113668" description="XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE" url="http://www.sec.gov/Archives/edgar/data/1166691/000119312507140058/cmcsa-20070331_pre.xml" />
        </edgar:xbrlFiles>
      </edgar:xbrlFiling>
    </item>

We convert it to rdf triples (shown here serialized as n3 triples).

@prefix edgar: <http://www.sec.gov/Archives/>.
@prefix ov: <http://owl.openvest.org/2005/10/Portfolio#>.
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>.
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.


 <http://www.sec.gov/Archives/edgar/data/101829/000119312505171147> a edgar:edgarxbrlFiling;
     edgar:edgaraccessionNumber "000119312505171147";
     edgar:edgarcikNumber "0000101829";
     edgar:edgarcompanyName "UNITED TECHNOLOGIES CORP /DE/";
     edgar:edgarfileNumber "001-00812";
     edgar:edgarfilingDate "2005-08-19"^^<http://www.w3.org/2001/XMLSchema#date>;
     edgar:edgarformType "8-K";
     edgar:edgarxbrlFiles [ a rdf:Seq;
             rdf:_1 <http://www.sec.gov/Archives/edgar/data/101829/000119312505171147/utx-20050812.xml>;
             rdf:_2 <http://www.sec.gov/Archives/edgar/data/101829/000119312505171147/utx-20050812.xsd>;
             rdf:_3 <http://www.sec.gov/Archives/edgar/data/101829/000119312505171147/utx-20050812_cal.xml>;
             rdf:_4 <http://www.sec.gov/Archives/edgar/data/101829/000119312505171147/utx-20050812_lab.xml>;
             rdf:_5 <http://www.sec.gov/Archives/edgar/data/101829/000119312505171147/utx-20050812_pre.xml>;
             rdf:_6 <http://www.sec.gov/Archives/edgar/data/101829/000119312505171147/utx-20050812_ref.xml>]. 
###########################################################################################
# A bunch of the above followed by a bunch of the below
###########################################################################################
<http://www.sec.gov/Archives/edgar/data/101829/000119312505171147/utx-20050812.xml> a ov:XbrlInstance;
     edgar:edgarurl "http://www.sec.gov/Archives/edgar/data/101829/000119312505171147/utx-20050812.xml"^^<http://www.w3.org/2001/XMLSchema#anyURI>;
     rdfs:comment "XBRL INSTANCE DOCUMENT"^^<http://www.w3.org/2001/XMLSchema#string>. 

 <http://www.sec.gov/Archives/edgar/data/101829/000119312505171147/utx-20050812.xsd> a ov:XbrlSchema;
     edgar:edgarurl "http://www.sec.gov/Archives/edgar/data/101829/000119312505171147/utx-20050812.xsd"^^<http://www.w3.org/2001/XMLSchema#anyURI>;
     rdfs:comment "XBRL TAXONOMY EXTENSION SCHEMA"^^<http://www.w3.org/2001/XMLSchema#string>. 

 <http://www.sec.gov/Archives/edgar/data/101829/000119312505171147/utx-20050812_cal.xml> a ov:XbrlCalculationLinkbase;
     edgar:edgarurl "http://www.sec.gov/Archives/edgar/data/101829/000119312505171147/utx-20050812_cal.xml"^^<http://www.w3.org/2001/XMLSchema#anyURI>;
     rdfs:comment "XBRL TAXONOMY EXTENSION CALCULATION LINKBASE"^^<http://www.w3.org/2001/XMLSchema#string>. 

 <http://www.sec.gov/Archives/edgar/data/101829/000119312505171147/utx-20050812_lab.xml> a ov:XbrlLabelLinkbase;
     edgar:edgarurl "http://www.sec.gov/Archives/edgar/data/101829/000119312505171147/utx-20050812_lab.xml"^^<http://www.w3.org/2001/XMLSchema#anyURI>;
     rdfs:comment "XBRL TAXONOMY EXTENSION LABEL LINKBASE"^^<http://www.w3.org/2001/XMLSchema#string>.