REXML fails to select from attribute. Bug or incorrect XPath?

I try to select an element from an SVG document by a special attribute. I set up a simple example.

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg">
  <g id='1'>
    <path id='2' type='A'/>
    <rect id='3' type='B'/>
  </g>
</svg>

Now I use the following syntax to retrieve the path element by its attribute "type":

require 'rexml/document'
include REXML
xmlfile = File.new "xml_as_specified_above.svg"
xmldoc = Document.new(xmlfile)
XPath.match( xmldoc.root, "//path[@type]" )

Syntax directly from http://www.w3schools.com/xpath/xpath_syntax.asp. I would expect that this expression selects the path element but this is what follows:

>> XPath.match( xmldoc.root, "//path[@type]" )
=> []

So, what is the correct syntax in XPath to address the path element by it's attribute? Or is there a bug in REXML (using 3.1.7.3)? Plus points for also retrieving the "rect" element.

Solution

It looks like an older version of rexml is being picked up that doesn't support the full XPath spec.

Try checking the output of puts XPath::VERSION to ensure that 3.1.73 is displayed.