onStartTag for root node in std.xml

[Heromyth]

In the test code, the onStartTag will not be called for the root node "set".

The onEndTag is OK, and the onStartTag is OK for sub nodes.

Is this a bug, or just it is? Can anybody confirm it?
Thanks.

// test.d
module main;

import std.string;
import std.stdio;
import std.xml;

int main(string[] argv)
{
        string s = r"<?xml version='1.0'?>
                <set>
                <one>A</one>
                <!-- comment -->
                <two>B</two>
                </set>";

        string tempStr;

        auto xml = new DocumentParser(s);

        xml.onStartTag["set"] = (ElementParser xml)
        {
                tempStr = "start=>" ~  xml.tag.name;
                writefln(tempStr);
                xml.parse();
        };

        xml.onEndTag["set"] = (in Element e)
        {
                tempStr = "end=>" ~ e.tag.name;
                writefln(tempStr);
        };

    xml.parse();

   return 0;
}