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How to use XPATH on SVG?

From: "Siegfried Heintze" <siegfried@-------.--->
To: NULL
Date: 11/4/2008 9:28:00 PM

Below is a simplified version of the file from which I am trying to use 
XPATH to extract some values. My code seems to work with no namespaces but 
the SVG namespaces are messing me up (I think).

Here is my XPATH I'm trying to parse with MSXML2. I've tried it with and 
without the "svg:" and it does not work.

Thanks!
Siegfried

_bstr_t bstrQuery(

//L"/html/body/form/table/tbody/tr[2]/td/svg:svg/svg:g/svg:text/[@class=\"tch\"]"

L"/html/svg:svg/svg:g/svg:text/[@class=\"tch\"]"

);

MSXML2::IXMLDOMNodeListPtr pNodeList;

pNodeList = pXMLDoc->selectNodes(bstrQuery);

long lLen = 0;

HRESULT hr = pNodeList->get_length(&lLen);

if ( SUCCEEDED(hr) )

{

for (int i = 0; i < lLen; i++)

{

MSXML2::IXMLDOMNodePtr pXMLNode;

pNodeList->get_item(i,&pXMLNode);

// Get some attribute as an example

_variant_t vNodeValue;

hr = pXMLNode->get_nodeValue(&vNodeValue);

MSXML2::IXMLDOMNodeListPtr pNodeList = pXMLNode->childNodes;

long lLen2 = pNodeList->length;

for(int jj = 0; jj < lLen2; ++jj)

{

MSXML2::IXMLDOMNodePtr pXMLNode;

pNodeList->get_item(jj,&pXMLNode);

_bstr_t text;

text = pXMLNode->text;

TraceW(L" item = %d\n", ((LPCWSTR)text)[0L]);

}

MSXML2::IXMLDOMElement *pNodeElm = NULL;

hr = pXMLNode->QueryInterface(IID_IXMLDOMElement, (void**)&pNodeElm);

if ( SUCCEEDED(hr) )

{

vNodeValue = pNodeElm->getAttribute(L"x");

_bstr_t text = vNodeValue;

TraceW(L"x=%s", (LPCWSTR)text);

pNodeElm->Release();

}

}

}

}



Here is the XML:



<?xml version="1.0" encoding="utf-8"?>
<html xmlns="http://www.w3.org/1999/xhtml" 
xmlns:svg="http://www.w3.org/2000/svg" 
xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
<svg version="1.1" xmlns="http://www.w3.org/2000/svg" 
xmlns:xlink="http://www.w3.org/1999/xlink" x="0mm" y="0mm" width="500mm" 
height="390.mm" viewBox="0 0 500 390" enable-background="new 0 0 1390.076 
390.208" xml:space="preserve">


  <g transform="translate( 40.00, 59.55)"><rect id="line 1277 rect" 
title="0002 0001 scan 001 `  ~"    width="12.5"   height="12.5" 
class="keyoutline" />  <text x=" 1"      y=" 5" class="common-up" 
text-anchor="middle">~</text><text x=" 1" y="11" class="common">`</text> 
<text x=" 6" y="11" class="tch">&#24055;</text><text x=" 6" y="11" 
class="ru-up">&#516;</text><text x=" 6" y="11" class="ru-lo">&#517;</text> 
</g>
</svg>
</html>

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