VB6 XML insert nodes and set attributes

I need to insert nodes into an existing xml file. This operation will create what has to be done manually. This particular xml file has attributes (as seen using my XML viewer) for some of the nodes. Some have as many as 3 attributes. They are named ObjectId, ClassId and Version.

I can't seem to figure out how to insert these nodes with these attributes. Below is a sample of what needs to be inserted:

<Markers ObjectID="22" ClassID="bee50706-b524-416c-9f03-b596ce5f6866" Version="2">
    <Markers Version="1">
        <Marker Version="1" Index="0">
            <Second ObjectRef="23"/>
            <First>0</First>
        </Marker>
        <Marker Version="1" Index="1">
            <Second ObjectRef="24"/>
            <First>8475667200</First>
        </Marker>
        <Marker Version="1" Index="2">
            <Second ObjectRef="25"/>
            <First>254270016000</First>
        </Marker>
        <Marker Version="1" Index="3">
            <Second ObjectRef="26"/>
            <First>72051646867200</First>
        </Marker>
        <Marker Version="1" Index="4">
            <Second ObjectRef="27"/>
            <First>471925149696000</First>
        </Marker>
    </Markers>
    <Node Version="1"/>
</Markers>

This represents 4 markers in a video timeline. The above is only a reference to additional nodes that need to be created. If I can see how to add these, I believe I can do the rest.

Are these attribute names just arbitrary names or is object ID, Class ID and Version specific node attribute types?

Your help will make a very tedious process easy / simple. Thanks