XmlSchemaType schemaType = elt.getSchemaType();
// if the schema is a complex type then we are interested!
if (schemaType instanceof XmlSchemaComplexType) {
XmlSchemaComplexType complexType = (XmlSchemaComplexType)schemaType;
if (complexType.getParticle()!=null){
XmlSchemaParticle particle = complexType.getParticle();
if (particle instanceof XmlSchemaSequence){
//fine! We have a sequence. so we need to traverse through this
//and find the nested elements
XmlSchemaSequence sequence = (XmlSchemaSequence)particle;
XmlSchemaElement internalElement;