OK, I've tried a number of different ways to get around handling additional elements that aren't in the RSS 2.0 specification (such as trackback:ping, wfw:rssComments, slash:comments, etc. - basically anything using QName).  First, I started with the way you are supposed to do it, referencing and importing namespaces, creating seperate xsd schemas and the using the ref attribute... that didn't work. So then I started hacking the document by adding the namespace to the elements of the XML on the fly, that didn't work either.

I've created a paired down version of my earlier schema (for testing purposes) that will grab the RSS 2.0 feed from the SPS Blog, but the hack is atrocious (look at the UndeclaredNamespace procedure). No matter what I try, I can't get MSXML4 and the XMLAdapter to behave and bring in those elements (with their content) without the hack. Anyone got any ideas, or better yet, solutions? I hope I'm missing something here and that it isn't a problem with MSXML4 with no workaround.

LOCAL loXMLAdapter, loBrowser, lcXSD, lcRSSContent, lcXMLHeader, lcXMLFooter lcXMLHeader = GetHeader() lcXSD = VFPRSS2Schema() lcRSSContent = RetrieveRSS("http://www.sweetpotatosoftware.com/SPSBlog/SyndicationService.asmx/GetRss") UndeclaredNamespace(@lcRSSContent) lcXMLFooter = GetFooter() oXMLAdapter = NEWOBJECT('XMLAdapter') oXMLAdapter.LOADXML(lcXMLHeader + lcXSD+ lcRSSContent + lcXMLFooter) CLOSE DATABASES ALL oXMLAdapter.TABLES(1).TOCURSOR && Item oXMLAdapter.TABLES(2).TOCURSOR && Channel oXMLAdapter.TABLES(3).TOCURSOR && Rss SET ***************************** FUNCTION GetHeader() *****************************  LOCAL lcHeader  TEXT TO lcHeader NOSHOW <?xml version="1.0" encoding="utf-8" ?> <VFPDataSet>  ENDTEXT  RETURN lcHeader ENDFUNC ***************************** FUNCTION GetFooter() *****************************  LOCAL lcFooter  TEXT TO lcFooter NOSHOW </VFPDataSet>  ENDTEXT  RETURN lcFooter ENDFUNC ***************************** PROCEDURE UndeclaredNamespace(tcRSSContent) *****************************    *!* Workaround for MSXML4 - This needs to be worked on still, I can't seem to get these elements even if    *!* I split up the schemas and use imports and ref in element tag    *!* However, this workaround at least ensures that it doesn't blow up with "Undeclared Namespace Prefix" error    *!* while still retrieving the contents. I hate hacks like this, especially in this case because these elements aren't    *!* part of the specification, but are on many blogs including mine.    *!* Anyone got a better fix or know how to do this right?    tcRSSContent = STRTRAN(tcRSSContent, "trackback:ping", [trackbackping], -1, -1, 1)    tcRSSContent = STRTRAN(tcRSSContent, "pingback:server", [pingbackserver], -1, -1, 1)    tcRSSContent = STRTRAN(tcRSSContent, "pingback:target", [pingbacktarget], -1, -1, 1)    tcRSSContent = STRTRAN(tcRSSContent, "wfw:commentRSS", [wfwcommentRss], -1, -1, 1)    tcRSSContent = STRTRAN(tcRSSContent, "wfw:comment", [wfwcomment], -1, -1, 1)    tcRSSContent = STRTRAN(tcRSSContent, "slash:comment>", [slashcomments], -1, -1, 1) ENDPROC ***************************** FUNCTION VFPRSS2Schema() *****************************  LOCAL lcXML  TEXT TO lcXML NOSHOW <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/"    xmlns:wfw="http://wellformedweb.org/CommentAPI/"    xmlns:slash="http://purl.org/rss/1.0/modules/slash/"    xmlns:pingback="http://madskills.com/public/xml/rss/module/pingback/"   attributeFormDefault="qualified" elementFormDefault="qualified" >   <xsd:element name="rss">     <xsd:complexType>       <xsd:sequence>         <xsd:element name="channel">           <xsd:complexType>             <xsd:sequence>               <xsd:element name="title" type="xsd:string" />               <xsd:element name="link" type="xsd:string" />               <xsd:element name="description" type="xsd:string" />               <xsd:element name="copyright" type="xsd:string" />               <xsd:element name="lastBuildDate" type="xsd:string" />               <xsd:element name="generator" type="xsd:string" />               <xsd:element name="managingEditor" type="xsd:string" />               <xsd:element name="webMaster" type="xsd:string" />               <xsd:element name="item">                 <xsd:complexType>                   <xsd:sequence>                      <xsd:element name="trackbackping" type="xsd:string" maxOccurs="unbounded" />                      <xsd:element name="pingserver" type="xsd:string" />                     <xsd:element name="pingtarget" type="xsd:string" />                     <xsd:element name="wfwcomment" type="xsd:string" />                     <xsd:element name="wfwcommentRss" type="xsd:string" />                     <xsd:element name="slashcomments" type="xsd:string" />                     <xsd:element name="title" type="xsd:string" />                     <xsd:element name="guid" type="xsd:string" />                     <xsd:element name="link" type="xsd:string" />                     <xsd:element name="pubDate" type="xsd:string" />                     <xsd:element name="description" type="xsd:string" />                     <xsd:element name="comments" type="xsd:string" />                     <xsd:element name="category" type="xsd:string" />                   </xsd:sequence>                 </xsd:complexType>               </xsd:element>             </xsd:sequence>           </xsd:complexType>         </xsd:element>       </xsd:sequence>       <xsd:attribute name="version" type="xsd:decimal" use="required" />     </xsd:complexType>   </xsd:element> </xsd:schema> ENDTEXT  RETURN lcXML ENDFUNC ***************************** FUNCTION RetrieveRSS(tcURL) *****************************  #DEFINE INTERNET_OPEN_TYPE_PRECONFIG 0  #DEFINE SYNCHRONOUS 0  #DEFINE INTERNET_FLAG_RELOAD 2147483648  DECLARE INTEGER InternetOpen IN WININET STRING Agent, ;   INTEGER AccessType, STRING ProxyName, ;   STRING ProxyBypass, INTEGER Flags  DECLARE INTEGER InternetOpenUrl IN WININET ;   INTEGER hInternetSession, STRING Url, STRING Header, ;   INTEGER HeaderLength, INTEGER Flags, INTEGER Context  DECLARE INTEGER InternetReadFile IN WININET INTEGER file, ;   STRING @Buffer, INTEGER NumberOfBytesToRead, INTEGER @BytesRead  DECLARE SHORT InternetCloseHandle IN WININET INTEGER hInst  LOCAL lcAgent, lhInternetSession, lhFile, llOK, lnReturn, lcReadBuffer, lnBytesRead, lcRetVal  lcAgent = "VFP RSS 2.0 Reader"  lhInternetSession = InternetOpen(lcAgent, INTERNET_OPEN_TYPE_PRECONFIG, "", "", SYNCHRONOUS)  IF lhInternetSession = 0   ? "Problem Encountered: Internet session cannot be established"  ELSE   lhFile = InternetOpenUrl( lhInternetSession, tcURL, '', 0, INTERNET_FLAG_RELOAD, 0)   IF lhFile = 0    ? "Problem Encountered: URL cannot be opened"   ELSE    lcRetVal = ""    llOK = .T.        DO WHILE llOK     lcReadBuffer = SPACE(1500)     lnBytesRead = 0     lnReturn = InternetReadFile(lhFile, @lcReadBuffer, LEN(lcReadBuffer), @lnBytesRead)     IF (lnBytesRead > 0)      lcRetVal = lcRetVal + LEFT(lcReadBuffer, lnBytesRead)     ENDIF     llOK = (lnReturn = 1 AND lnBytesRead > 0)    ENDDO        InternetCloseHandle(lhFile)    InternetCloseHandle(lhInternetSession)    lcRetVal = SUBSTR(lcRetVal, ATC("<rss", lcRetVal))        RETURN LEFT(lcRetVal, ATC("</rss>", lcRetVal) + 9)   ENDIF  ENDIF  RETURN "" ENDFUNC