xctxt.pushCurrentNode(DTM.NULL);
int[] currentNodes = xctxt.getCurrentNodeStack();
int currentNodePos = xctxt.getCurrentNodeFirstFree() - 1;
xctxt.pushCurrentExpressionNode(DTM.NULL);
int[] currentExpressionNodes = xctxt.getCurrentExpressionNodeStack();
int currentExpressionNodePos = xctxt.getCurrentExpressionNodesFirstFree() - 1;
xctxt.pushSAXLocatorNull();
xctxt.pushContextNodeList(sourceNodes);