code: public ArrayList<AccessionID> getAccessions() throws XPathExpressionException {
  		ArrayList<AccessionID> accessionList = new ArrayList<AccessionID>();
  		if (uniprotDoc == null) {
  			return accessionList;
  		}
  		Element uniprotElement = uniprotDoc.getDocumentElement();
  		Element entryElement = XMLHelper.selectSingleElement(uniprotElement, "entry");
  		ArrayList<Element> keyWordElementList = XMLHelper.selectElements(entryElement, "accession");
  		for (Element element : keyWordElementList) {
  			AccessionID accessionID = new AccessionID(element.getTextContent(), DataSource.UNIPROT);
  			accessionList.add(accessionID);
  		}
  
  		return accessionList;
  	}
docs: Pull uniprot accessions associated with this sequence
  @return
  @throws XPathExpressionException