[Help Me!] XML variables concerning sprite positions

Thanks, but just a clarification; You said the y-axis was inverted, so The scale I should be using is what you said, "Negative is left and up.
Positive is right and down.", or is the y-axis flipped from that?

Code:

<imgdir name="0">
            <canvas name="body" width="21" height="31" basedata="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">
                <vector name="origin" x="16" y="31"/>
                <imgdir name="map">
                    <vector name="neck" x="-4" y="-32"/>
                    <vector name="navel" x="-8" y="-21"/>
                </imgdir>
                <string name="z" value="body"/>
                <string name="group" value="skin"/>
            </canvas>
            <canvas name="arm" width="10" height="19" basedata="iVBORw0KGgoAAAANSUhEUgAAAAoAAAATCAYAAACp65zuAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAALdJREFUOE+NkgERhDAMBNHyFrDwFl4LFt5CLdQCFmqhFmLhPte00M9ACzMZhmG53l1YFrtQpz7e3JAjsG9zGJIA2R/BCiqcw1yVHpFVNc1hA+k3vIbKFaTqOJiC9EnVoKrrRLWEYgOfB8cTvgnVvobEt1WVvkD8V4XQm+RuTNGHMgU/DOTWauYPkKlZkR7N6Tq1kkst3RRwc2BczROP4zQ1BnNbOl82SP1drfIEtWgCo30fXV798T8cUTERs67MDwAAAABJRU5ErkJggg==">
                <vector name="origin" x="5" y="9"/>
                <imgdir name="map">
                    <vector name="navel" x="-13" y="-1"/>
                    <vector name="hand" x="-1" y="5"/>
                </imgdir>
                <string name="z" value="arm"/>
                <string name="group" value="skin"/>
            </canvas>
            <short name="face" value="1"/>
            <int name="delay" value="500"/>
        </imgdir>

Alright, so I'm merely trying to position both the body sprite and the arm sprite of stand1 (Frame 0) by using the values I've obtained.
How do you think the values go together here? I've already tried by to no avail.