Named points

[VladimirKalachikhin]

"GPX points can be named, for example to denote certain POIs (points of interest). You can setup rules to match point names to create labeled markers"
I have the POIs file like this:

  <wpt lat="60.2068333" lon="25.7541667">
    <time>2011-11-08T20:32:40Z</time>
    <name>Aggskar</name>
    <sym>Beach</sym>
    <extensions>
      <gpxx:WaypointExtension xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3">
        <gpxx:DisplayMode>SymbolAndName</gpxx:DisplayMode>
      </gpxx:WaypointExtension>
    </extensions>
  </wpt>

  <wpt lat="55.9259326" lon="14.3052798">
    <time>2013-03-08T12:31:11Z</time>
    <name>Ahus</name>
    <cmt>150-200kr EWTDA Inet</cmt>
    <desc>150-200kr EWTDA Inet</desc>
    <sym>Marina</sym>
    <extensions>
      <gpxx:WaypointExtension xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3">
        <gpxx:DisplayMode>SymbolAndName</gpxx:DisplayMode>
      </gpxx:WaypointExtension>
    </extensions>
  </wpt>

First, the type of point are specified by <sym> </sym> tags.
Second, the custom marker are specified by

    <gpxx:WaypointExtension xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3">
       <gpxx:DisplayMode>SymbolAndName</gpxx:DisplayMode>
     </gpxx:WaypointExtension>

extension.

My question is:
Is it possible to match <sym> </sym> tags to create labeled markers?
and/or
Is it possible add support Garmin gpxx extensions?

Next question:
Is there a way to add a popup from <desc></desc> tags to labeled marker?