How to add lead attributes in a chained-attribute expression?

In Progress 4GL i need to export some data as XML formates to client.But for some case i need to add lead attributes in a chained-attribute.Can you help this case? You can see my codes down.

hOutSAXDocument:START-DOCUMENT().
hOutSAXDocument:START-ELEMENT("DataItems").
hOutSAXDocument:START-ELEMENT("DataItem").
hOutSAXDocument:INSERT-ATTRIBUTE("Name","Date"):INSERT-ATTRIBUTE("Type","String").


You can see the fourth line i have added lead attributes in a chined attribute but syntex is not correct.I dont know how to solve this issues but generating XML will be like this(see attached picture in this body) XML Formate

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