code: public static SortedSet<String> getAll() {
  		SortedSet<String> representatives = new TreeSet<String>();
  
  		try {
  
  			URL u = new URL(allUrl);
  
  			InputStream stream = URLConnectionTools.getInputStream(u, 60000);
  
  			if (stream != null) {
  				BufferedReader reader = new BufferedReader(
  						new InputStreamReader(stream));
  
  				String line = null;
  
  				while ((line = reader.readLine()) != null) {
  					int index = line.lastIndexOf("structureId=");
  					if (index > 0) {
  						representatives.add(line.substring(index + 13, index + 17));
  					}
  				}
  			}
  
  		} catch (Exception e) {
  			e.printStackTrace();
  		}
  
  		return representatives;
  	}
docs: Returns the current list of all PDB IDs.
  @return PdbChainKey set of all PDB IDs.