}
String ns = Namespaces.KARMA;
// Create the internal node for worksheet
Label internalNodeLabel = new Label(ns + worksheet.getTitle().trim().replaceAll(" ", "_"), ns, "karma");
Node classNode = alignment.addInternalNode(internalNodeLabel);
// Create column nodes for all columns
List<HNode> sortedLeafHNodes = new ArrayList<HNode>();
worksheet.getHeaders().getSortedLeafHNodes(sortedLeafHNodes);
for (HNode hNode : sortedLeafHNodes){