Extracing data from XHTML file into another

Discussion in 'XML' started by chris_huh, May 26, 2009.

  1. chris_huh

    chris_huh Guest

    Is there a way to extract data from one xhtml file and create another
    one with it. I want to create a basic file with all the headlines from
    a news page listed in it (like an rss feed).
    chris_huh, May 26, 2009
    #1
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  2. chris_huh wrote:
    > Is there a way to extract data from one xhtml file and create another
    > one with it. I want to create a basic file with all the headlines from
    > a news page listed in it (like an rss feed).


    Well XHTML is supposed to be XML so in theory you should be able to use
    any XML parser respectively XML API to extract data, like XPath, XSLT,
    XQuery. In practice however lots of XHTML is served as text/html and is
    often not well-formed XML so XML parsers might fail to process it.

    --

    Martin Honnen
    http://msmvps.com/blogs/martin_honnen/
    Martin Honnen, May 26, 2009
    #2
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  3. Martin Honnen wrote:
    > Well XHTML is supposed to be XML so in theory you should be able to use
    > any XML parser respectively XML API to extract data, like XPath, XSLT,
    > XQuery. In practice however lots of XHTML is served as text/html and is
    > often not well-formed XML so XML parsers might fail to process it.


    Even if served as text/html, appropriate software could recognize and
    process it as XHTML and thus XML. You'd have to either know to expect
    XHTML or have a prebuffer/prescan pass to check that.

    Not that if it isn't well-formed XML, it really isn't XHTML, no matter
    what the document's contents claim. That's one of the major differences
    between XHTML and HTML -- HTML was SGML-based and allowed some
    shortcuts/sloppiness that the XML-based XHTML doesn't.
    Joe Kesselman, May 26, 2009
    #3
  4. chris_huh

    chris_huh Guest

    On 26 May, 13:23, Joe Kesselman <>
    wrote:
    > Martin Honnen wrote:
    > > Well XHTML is supposed to be XML so in theory you should be able to use
    > > any XML parser respectively XML API to extract data, like XPath, XSLT,
    > > XQuery. In practice however lots of XHTML is served as text/html and is
    > > often not well-formed XML so XML parsers might fail to process it.

    >
    > Even if served as text/html, appropriate software could recognize and
    > process it as XHTML and thus XML. You'd have to either know to expect
    > XHTML or have a prebuffer/prescan pass to check that.
    >
    > Not that if it isn't well-formed XML, it really isn't XHTML, no matter
    > what the document's contents claim. That's one of the major differences
    > between XHTML and HTML -- HTML was SGML-based and allowed some
    > shortcuts/sloppiness that the XML-based XHTML doesn't.


    I have tried using a server-based approach (using the tutorial from
    the w3schools sites - http://www.w3schools.com/xsl/xsl_server.asp) but
    it doesn't seem to accept the xhtml file (the asp file just
    continously loads). Is this taking the wrong tactic. I don't know much
    about xml.

    What i have is an xhtml file (with a .shtml extension) which is used
    as an index page for a section in a news site (i have ten sections).
    And i want another file made making an unordered list of the items on
    that index page. On each index page there are three top stories, and i
    want another file created that holds these three stories in a <ul>.
    These 10 generated files (there will be one for each section) will
    then be included in the top index page. Does that explain it well?
    chris_huh, May 26, 2009
    #4
  5. chris_huh wrote:

    > I have tried using a server-based approach (using the tutorial from
    > the w3schools sites - http://www.w3schools.com/xsl/xsl_server.asp) but
    > it doesn't seem to accept the xhtml file (the asp file just
    > continously loads). Is this taking the wrong tactic. I don't know much
    > about xml.
    >
    > What i have is an xhtml file (with a .shtml extension) which is used
    > as an index page for a section in a news site (i have ten sections).


    Aren't .shtml files usually ones making use of SSI (server-side
    includes)? Are you loading the document from the file system or over
    HTTP? Can you post the URL to a sample document?

    --

    Martin Honnen
    http://msmvps.com/blogs/martin_honnen/
    Martin Honnen, May 26, 2009
    #5
  6. chris_huh

    chris_huh Guest

    On 26 May, 14:06, Martin Honnen <> wrote:
    > chris_huh wrote:
    > > I have tried using a server-based approach (using the tutorial from
    > > the w3schools sites -http://www.w3schools.com/xsl/xsl_server.asp) but
    > > it doesn't seem to accept the xhtml file (the asp file just
    > > continously loads). Is this taking the wrong tactic. I don't know much
    > > about xml.

    >
    > > What i have is an xhtml file (with a .shtml extension) which is used
    > > as an index page for a section in a news site (i have ten sections).

    >
    > Aren't .shtml files usually ones making use of SSI (server-side
    > includes)? Are you loading the document from the file system or over
    > HTTP? Can you post the URL to a sample document?
    >
    > --
    >
    >         Martin Honnen
    >        http://msmvps.com/blogs/martin_honnen/


    Yeah, i am using ssi to include other files in .shtml files. I cant
    sent a link as i am using it on a closed server.

    I am using:

    <!--#include virtual="/includes/navigation.sssi" -->

    to include the files.i guess that means it is over HTTP. The idea (if
    this is even possible) is to include each of these created files using
    this similar function.
    chris_huh, May 26, 2009
    #6
  7. chris_huh wrote:

    > Yeah, i am using ssi to include other files in .shtml files. I cant
    > sent a link as i am using it on a closed server.
    >
    > I am using:
    >
    > <!--#include virtual="/includes/navigation.sssi" -->
    >
    > to include the files.i guess that means it is over HTTP.


    If you use SSI then reading a file from the file system would not
    process any of those SSI instructions.

    It is hard to tell what goes wrong without being able to check the
    X(HT)ML documents you have. If you use classic ASP and have troubles
    getting your code to work then you might want to ask in a newsgroup
    dedicated to that: microsoft.public.inetserver.asp.general


    --

    Martin Honnen
    http://msmvps.com/blogs/martin_honnen/
    Martin Honnen, May 26, 2009
    #7
  8. chris_huh

    chris_huh Guest

    On May 26, 2:41 pm, Martin Honnen <> wrote:
    > chris_huh wrote:
    > > Yeah, i am using ssi to include other files in .shtml files. I cant
    > > sent a link as i am using it on a closed server.

    >
    > > I am using:

    >
    > > <!--#include virtual="/includes/navigation.sssi" -->

    >
    > > to include the files.i guess that means it is over HTTP.

    >
    > If you use SSI then reading a file from the file system would not
    > process any of those SSI instructions.
    >
    > It is hard to tell what goes wrong without being able to check the
    > X(HT)ML documents you have. If you use classic ASP and have troubles
    > getting your code to work then you might want to ask in a newsgroup
    > dedicated to that: microsoft.public.inetserver.asp.general
    >
    > --
    >
    >         Martin Honnen
    >        http://msmvps.com/blogs/martin_honnen/


    Yeah, i suppose it could be more of an issue with asp. The asp code i
    use is:

    <%
    'Load XML
    set xml = Server.CreateObject("Microsoft.XMLDOM")
    xml.async = false
    xml.load(Server.MapPath("/iraq/index.shtml"))

    'Load XSL
    set xsl = Server.CreateObject("Microsoft.XMLDOM")
    xsl.async = false
    xsl.load(Server.MapPath("/includes/style.xsl"))

    'Transform file
    Response.Write(xml.transformNode(xsl))
    %>

    When the Server.MapPath is a .xml file it works ok, but when it is
    a .shtml file, loading from the actual file itself it just crashes. It
    could be something wrong with the shtml file (maybe it isn't correct
    xhtml) or maybe you can't use an shtml file. Thats what i wasn't sure
    about.
    chris_huh, May 26, 2009
    #8
  9. chris_huh wrote:

    > Yeah, i suppose it could be more of an issue with asp. The asp code i
    > use is:
    >
    > <%
    > 'Load XML
    > set xml = Server.CreateObject("Microsoft.XMLDOM")
    > xml.async = false
    > xml.load(Server.MapPath("/iraq/index.shtml"))



    > When the Server.MapPath is a .xml file it works ok, but when it is
    > a .shtml file, loading from the actual file itself it just crashes. It
    > could be something wrong with the shtml file (maybe it isn't correct
    > xhtml) or maybe you can't use an shtml file. Thats what i wasn't sure
    > about.


    You can check for parse errors with MSXML as follows, put that after the
    load call:
    If xml.parseError.errorCode <> 0 Then
    Response.Write xml.parseError.reason
    End If


    --

    Martin Honnen
    http://msmvps.com/blogs/martin_honnen/
    Martin Honnen, May 26, 2009
    #9
  10. chris_huh

    chris_huh Guest

    On May 26, 3:42 pm, Martin Honnen <> wrote:
    > chris_huh wrote:
    > > Yeah, i suppose it could be more of an issue with asp. The asp code i
    > > use is:

    >
    > > <%
    > > 'Load XML
    > > set xml = Server.CreateObject("Microsoft.XMLDOM")
    > > xml.async = false
    > > xml.load(Server.MapPath("/iraq/index.shtml"))
    > > When the Server.MapPath is a .xml file it works ok, but when it is
    > > a .shtml file, loading from the actual file itself it just crashes. It
    > > could be something wrong with the shtml file (maybe it isn't correct
    > > xhtml) or maybe you can't use an shtml file. Thats what i wasn't sure
    > > about.

    >
    > You can check for parse errors with MSXML as follows, put that after the
    > load call:
    >    If xml.parseError.errorCode <> 0 Then
    >      Response.Write xml.parseError.reason
    >    End If
    >
    > --
    >
    >         Martin Honnen
    >        http://msmvps.com/blogs/martin_honnen/


    I tried that but the script just times out.

    Also i tried to validate the .shtml file (which is xhtml) and the only
    errors were some xml markup. I put in <headline> tags for each title
    so that i could extract it and it says that they are wrong? Is that
    not how you do this?
    chris_huh, May 26, 2009
    #10
  11. chris_huh

    chris_huh Guest

    On May 26, 3:42 pm, Martin Honnen <> wrote:
    > chris_huh wrote:
    > > Yeah, i suppose it could be more of an issue with asp. The asp code i
    > > use is:

    >
    > > <%
    > > 'Load XML
    > > set xml = Server.CreateObject("Microsoft.XMLDOM")
    > > xml.async = false
    > > xml.load(Server.MapPath("/iraq/index.shtml"))
    > > When the Server.MapPath is a .xml file it works ok, but when it is
    > > a .shtml file, loading from the actual file itself it just crashes. It
    > > could be something wrong with the shtml file (maybe it isn't correct
    > > xhtml) or maybe you can't use an shtml file. Thats what i wasn't sure
    > > about.

    >
    > You can check for parse errors with MSXML as follows, put that after the
    > load call:
    >    If xml.parseError.errorCode <> 0 Then
    >      Response.Write xml.parseError.reason
    >    End If
    >
    > --
    >
    >         Martin Honnen
    >        http://msmvps.com/blogs/martin_honnen/


    The asp finally loaded and came back with:

    The system cannot locate the resource specified. Error processing
    resource 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'.

    Which i guess is meaning the line at the top of the xhtml file. Maybe
    it can't read taht properly.
    chris_huh, May 26, 2009
    #11
  12. chris_huh wrote:

    > The asp finally loaded and came back with:
    >
    > The system cannot locate the resource specified. Error processing
    > resource 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'.
    >
    > Which i guess is meaning the line at the top of the xhtml file. Maybe
    > it can't read taht properly.


    Dpoes it work when you set
    xml.resolveExternals = False
    before the load call?

    --

    Martin Honnen
    http://msmvps.com/blogs/martin_honnen/
    Martin Honnen, May 26, 2009
    #12
  13. chris_huh

    chris_huh Guest

    On May 26, 4:03 pm, Martin Honnen <> wrote:
    > chris_huh wrote:
    > > The asp finally loaded and came back with:

    >
    > > The system cannot locate the resource specified. Error processing
    > > resource 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'.

    >
    > > Which i guess is meaning the line at the top of the xhtml file. Maybe
    > > it can't read taht properly.

    >
    > Dpoes it work when you set
    >    xml.resolveExternals = False
    > before the load call?
    >
    > --
    >
    >         Martin Honnen
    >        http://msmvps.com/blogs/martin_honnen/


    Now it comes back with: The element 'html' is used but not declared in
    the DTD/Schema.
    chris_huh, May 26, 2009
    #13
  14. chris_huh wrote:

    > Now it comes back with: The element 'html' is used but not declared in
    > the DTD/Schema.


    Add
    xml.validateOnParse = False
    before the load call.

    --

    Martin Honnen
    http://msmvps.com/blogs/martin_honnen/
    Martin Honnen, May 26, 2009
    #14
  15. chris_huh

    chris_huh Guest

    On May 26, 4:46 pm, Martin Honnen <> wrote:
    > chris_huh wrote:
    > > Now it comes back with: The element 'html' is used but not declared in
    > > the DTD/Schema.

    >
    > Add
    >    xml.validateOnParse = False
    > before the load call.
    >
    > --
    >
    >         Martin Honnen
    >        http://msmvps.com/blogs/martin_honnen/


    I've got the code like this now, and it just procudes a blank page:

    <%
    'Load XML
    set xml = Server.CreateObject("Microsoft.XMLDOM")
    xml.async = false
    xml.validateOnParse = false
    xml.resolveExternals = false
    xml.load(Server.MapPath("/iraq/index.shtml"))

    If xml.parseError.errorCode <> 0 Then
    Response.Write xml.parseError.reason
    End If

    'Load XSL
    set xsl = Server.CreateObject("Microsoft.XMLDOM")
    xsl.async = false
    xsl.load(Server.MapPath("/includes/topstyle.xsl"))

    'Transform file
    Response.Write(xml.transformNode(xsl))
    %>
    chris_huh, May 26, 2009
    #15
  16. chris_huh wrote:

    > I've got the code like this now, and it just procudes a blank page:
    >
    > <%
    > 'Load XML
    > set xml = Server.CreateObject("Microsoft.XMLDOM")
    > xml.async = false
    > xml.validateOnParse = false
    > xml.resolveExternals = false
    > xml.load(Server.MapPath("/iraq/index.shtml"))
    >
    > If xml.parseError.errorCode <> 0 Then
    > Response.Write xml.parseError.reason
    > End If
    >
    > 'Load XSL
    > set xsl = Server.CreateObject("Microsoft.XMLDOM")
    > xsl.async = false
    > xsl.load(Server.MapPath("/includes/topstyle.xsl"))
    >
    > 'Transform file
    > Response.Write(xml.transformNode(xsl))
    > %>


    Well I would first debug the stylesheet in an XML editor to ensure it
    produces the output you want before running it in ASP.
    If you need help with the stylesheet then you need to share the XML
    input and the XSLT stylesheet.

    --

    Martin Honnen
    http://msmvps.com/blogs/martin_honnen/
    Martin Honnen, May 26, 2009
    #16
  17. chris_huh

    chris_huh Guest

    On May 26, 5:13 pm, Martin Honnen <> wrote:
    > chris_huh wrote:
    > > I've got the code like this now, and it just procudes a blank page:

    >
    > > <%
    > > 'Load XML
    > > set xml = Server.CreateObject("Microsoft.XMLDOM")
    > > xml.async = false
    > > xml.validateOnParse = false
    > > xml.resolveExternals = false
    > > xml.load(Server.MapPath("/iraq/index.shtml"))

    >
    > > If xml.parseError.errorCode <> 0 Then
    > > Response.Write xml.parseError.reason
    > > End If

    >
    > > 'Load XSL
    > > set xsl = Server.CreateObject("Microsoft.XMLDOM")
    > > xsl.async = false
    > > xsl.load(Server.MapPath("/includes/topstyle.xsl"))

    >
    > > 'Transform file
    > > Response.Write(xml.transformNode(xsl))
    > > %>

    >
    > Well I would first debug the stylesheet in an XML editor to ensure it
    > produces the output you want before running it in ASP.
    > If you need help with the stylesheet then you need to share the XML
    > input and the XSLT stylesheet.
    >
    > --
    >
    >         Martin Honnen
    >        http://msmvps.com/blogs/martin_honnen/


    The asp file is making the correct coding apart from the foreach
    stuff.

    So at the moment i have this for the ASP:

    <%
    'Load XML
    set xml = Server.CreateObject("Microsoft.XMLDOM")
    xml.async = false
    xml.validateOnParse = false
    xml.resolveExternals = false
    xml.load(Server.MapPath("/iraq/test.shtml"))

    If xml.parseError.errorCode <> 0 Then
    Response.Write xml.parseError.reason
    End If

    'Load XSL
    set xsl = Server.CreateObject("Microsoft.XMLDOM")
    xsl.async = false
    xsl.load(Server.MapPath("/includes/topstyle.xsl"))

    'Transform file
    Response.Write(xml.transformNode(xsl))
    %>

    This for the XSL:

    <?xml version="1.0" encoding="ISO-8859-1"?>
    <xsl:stylesheet version="1.0"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

    <xsl:eek:utput method="xml" version="1.0" encoding="UTF-8" doctype-
    public="-//W3C//DTD XHTML 1.1//EN" doctype-system="http://www.w3.org/
    TR/xhtml11/DTD/xhtml11.dtd" indent="yes"/>

    <xsl:template match="/">
    <html>
    <head>
    <title>Test</title>
    </head>
    <body>
    <ul>
    <xsl:for-each select="html/body/item">
    <li>
    <xsl:value-of select="headline" />
    </li>
    </xsl:for-each>
    </ul>
    </body>
    </html>
    </xsl:template>

    </xsl:stylesheet>

    And this for the XHTML:

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://
    www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="EN" lang="EN">
    <head>

    <title>Test stories</title>

    </head>

    <body class="iraq">

    <item>
    <table width="100%" border="0" cellspacing="0" cellpadding="0">
    <tr>
    <td width="226" rowspan="2" valign="top"><a href="#"><img src="../
    images/placeholder226.jpg" alt="Story 1" name="Story1image"
    width="226" height="170" id="Story1image" /></a></td>
    <td width="10" rowspan="2" valign="top"></td>
    <td valign="top"><h2 class="itemheader"><a href="#"
    class="itemlink"><headline>Story 1 headline</headline></a></h2></td>
    </tr>
    <tr>
    <td valign="top" class="itemdescription">Story 1 summary</td>
    </tr>
    <tr>
    <td height="10" colspan="3" valign="top"></td>
    </tr>
    </table></item>
    <table width="100%" border="0" cellspacing="0" cellpadding="0">
    <tr>
    <td width="238" align="left" valign="top">
    <item>
    <table width="228" border="0" cellspacing="0" cellpadding="0">
    <tr>
    <td width="76" valign="top"><a href="#"><img src="../images/
    placeholder66.jpg" alt="Story 2" name="Story2image" width="66"
    height="49" id="Story2image" /></a></td>
    <td valign="top"><h3 class="itemheader"><a href="#"
    class="itemlink"><headline>Story 2 headline</headline></a></h3></td>
    </tr>
    <tr>
    <td colspan="2" valign="top" height="10"></td>
    </tr>
    <tr>
    <td colspan="2" valign="top" class="itemdescription">Story 2
    summary</td>
    </tr>
    </table></item></td>
    <td align="right" valign="top"><item><table width="228" border="0"
    cellspacing="0" cellpadding="0">
    <tr>
    <td width="76" valign="top"><a href="#"><img src="../images/
    placeholder66.jpg" alt="Story 3" name="Story3image" width="66"
    height="49" id="Story2image2" /></a></td>
    <td valign="top"><h3 class="itemheader"><a href="#"
    class="itemlink"><headline>Story 3 headline</headline></a></h3></td>
    </tr>
    <tr>
    <td colspan="2" valign="top" height="10"></td>
    </tr>
    <tr>
    <td colspan="2" valign="top" class="itemdescription">Story 3
    summary</td>
    </tr>
    </table></item></td>
    </tr>
    </table>


    </body>

    </html>

    Obviously i want to change the XHTML to look nicer but i am just
    trying to get this working. I know the ASP and XSL work because if i
    use an XML file instead of XHTML it works:

    <?xml version="1.0" encoding="ISO-8859-1"?>
    <news>
    <item><headline>Story 1 headline</headline></item>
    <item><headline>Story 2 headline</headline></item>
    <item><headline>Story 3 headline</headline></item>
    </news>
    chris_huh, May 26, 2009
    #17
  18. chris_huh wrote:

    > <xsl:stylesheet version="1.0"
    > xmlns:xsl="http://www.w3.org/1999/XSL/Transform">


    You need
    xmlns="http://www.w3.org/1999/xhtml"
    xmlns:xhtml="http://www.w3.org/1999/xhtml"
    exclude-result-prefixes="xhtml"
    here on the xsl:stylesheet element to access XHTML elements and to
    create XHTML elements.


    > <xsl:template match="/">
    > <html>
    > <head>
    > <title>Test</title>
    > </head>
    > <body>
    > <ul>
    > <xsl:for-each select="html/body/item">


    You need to qualify all element names with the prefix 'xhtml' I defined
    above e.g.
    select="xhtml:html/xhtml:body/xhtml:item"

    > <li>
    > <xsl:value-of select="headline" />


    Same here
    select="xhtml:headline"

    and so one everywhere you want to access or match elements from the
    source document.



    --

    Martin Honnen
    http://msmvps.com/blogs/martin_honnen/
    Martin Honnen, May 26, 2009
    #18
  19. chris_huh

    chris_huh Guest

    On May 26, 5:45 pm, Martin Honnen <> wrote:
    > chris_huh wrote:
    > > <xsl:stylesheet version="1.0"
    > > xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

    >
    > You need
    >    xmlns="http://www.w3.org/1999/xhtml"
    >    xmlns:xhtml="http://www.w3.org/1999/xhtml"
    >    exclude-result-prefixes="xhtml"
    > here on the xsl:stylesheet element to access XHTML elements and to
    > create XHTML elements.
    >
    > > <xsl:template match="/">
    > > <html>
    > > <head>
    > > <title>Test</title>
    > > </head>
    > > <body>
    > >   <ul>
    > >     <xsl:for-each select="html/body/item">

    >
    > You need to qualify all element names with the prefix 'xhtml' I defined
    > above e.g.
    >                      select="xhtml:html/xhtml:body/xhtml:item"
    >
    > >     <li>
    > >       <xsl:value-of select="headline" />

    >
    > Same here
    >                        select="xhtml:headline"
    >
    > and so one everywhere you want to access or match elements from the
    > source document.
    >
    > --
    >
    >         Martin Honnen
    >        http://msmvps.com/blogs/martin_honnen/


    Now i have the xsl like this:

    <?xml version="1.0" encoding="ISO-8859-1"?>
    <xsl:stylesheet version="1.0"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns="http://www.w3.org/1999/xhtml"
    xmlns:xhtml="http://www.w3.org/1999/xhtml"
    exclude-result-prefixes="xhtml" >

    <xsl:eek:utput method="xml" version="1.0" encoding="UTF-8" doctype-
    public="-//W3C//DTD XHTML 1.1//EN" doctype-system="http://www.w3.org/
    TR/xhtml11/DTD/xhtml11.dtd" indent="yes"/>

    <xsl:template match="/">
    <html>
    <head>
    <title>Test</title>
    </head>
    <body>
    <ul>
    <xsl:for-each select="xhtml:html/xhtml:body/xhtml:item">
    <li>
    <xsl:value-of select="xhtml:headline" />
    </li>
    </xsl:for-each>
    </ul>
    </body>
    </html>
    </xsl:template>

    </xsl:stylesheet>

    which works a bit better (the Li items show up) but there still isn't
    anything inside the li items.
    chris_huh, May 26, 2009
    #19
  20. chris_huh wrote:

    > <xsl:for-each select="xhtml:html/xhtml:body/xhtml:item">
    > <li>
    > <xsl:value-of select="xhtml:headline" />


    I think those headline elements are deep down inside the table so you
    either have to spell out the complete path or use
    <xsl:value-of select="descendant::xhtml:headline"/>

    --

    Martin Honnen
    http://msmvps.com/blogs/martin_honnen/
    Martin Honnen, May 26, 2009
    #20
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