tree = newXMLDoc()
newXMLNode("xmcda:XMCDA",
namespace = c("xsi" = "http://www.w3.org/2001/XMLSchema-instance",
"xmcda" = "http://www.decision-deck.org/2009/XMCDA-2.1.0"),
parent=tree)
root<-getNodeSet(tree, "/xmcda:XMCDA")
criteria<-newXMLNode("criteria", parent=root[[1]], namespace=c())
criterion<-newXMLNode("criterion",attrs = c(id="g1"),
parent=criteria, namespace=c())
y<-checkXSD(tree)
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