sdtPr.setDataBinding(ctDataBinding);
ctDataBinding.setXpath("/oda:answers/oda:answer[@id='" + key +"']");
ctDataBinding.setPrefixMappings("xmlns:oda='http://opendope.org/answers'");
ctDataBinding.setStoreItemID(storeItemID);
CTSdtContentRun sdtContent = Context.getWmlObjectFactory().createCTSdtContentRun();
sdtRun.setSdtContent(sdtContent);
R rnew = new R();
rnew.setRPr( rPr ); // point at old rPr, if any
Text text = Context.getWmlObjectFactory().createText();
text.setValue(key);
rnew.getContent().add(text);
sdtContent.getContent().add(rnew);
}