public void ReplaceschemaAt(schemaType newValue, int index)
 {
     ReplaceDomChildAt(NodeType.Element, "http://www.imsglobal.org/xsd/imscp_v1p1", "schema", index, newValue.ToString());
 }
 public void Addschema(schemaType newValue)
 {
     AppendDomChild(NodeType.Element, "http://www.imsglobal.org/xsd/imscp_v1p1", "schema", newValue.ToString());
 }