You need a simpleContent[^] element as a child of the complexType. Then extend the simple type with attributes - like this: <xsd:element name="Well_Volumes"> xsd:complexType <xsd:sequence maxOccurs="unbounded"> <xsd:element name="Well"> <xsd:complexType> <xsd:simpleContent> <xsd:extension base="xsd:decimal"> <xsd:attribute name="channel" type="xsd:string"/> <xsd:attribute name="dispense\_order" type="xsd:string"/> <xsd:attribute name="plate\_column" type="xsd:string"/> <xsd:attribute name="plate\_row" type="xsd:string"/> </xsd:extension> </xsd:simpleContent> </xsd:complexType> </xsd:element> </xsd:sequence> </xsd:complexType> </xsd:element> Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p CodeProject MVP for 2010 - who'd'a thunk it!

Actually I think I got. It's probably not the best way, but I can do what I need by playing with the "topmost" property. Thanks.

I think I solved my own problem. Rather than trying to run multiple storyboards, each containing animations for a single target, I tired putting all of the animations for all of the targets into a single storyboard and arrange them on the timeline so they appear to fire in a random order. That seems to be working fairly well. My only issue now is how to set it up so it runs continuously. What complicates this is that each target has 3 animations associated with it. Each target is a droplet. The first 2 animations are an X and a Y scale transformations, to make the droplet grow. The third is a translate transformation as the droplet falls down the screen. I use this set of 3 animations for each of the droplets. I am not sure yet how to set this up so the animations for a target are repeated automatically in the proper sequence. If anyone has an ideas on this, again I would appreciate the help.