code: @Override
      public List<URI> registerServices(URI sourceDocumentUri, String mediaType) throws SalException {
  
          boolean isNativeFormat = MediaType.NATIVE_MEDIATYPE_SYNTAX_MAP.containsKey(mediaType);
          // Throw error if Format Unsupported
          if (!isNativeFormat && !this.serviceTransformationEngine.canTransform(mediaType)) {
              log.error("The media type {} is not natively supported and has no suitable transformer.", mediaType);
              throw new ServiceException("Unable to import service. Format unsupported.");
          }
  
          List<URI> registeredServices = new ArrayList<URI>();
  
          log.debug("Registering services from document: {}", sourceDocumentUri.toASCIIString());
          // 1st Obtain the document and parse/transform it
          List<Service> services = getServicesFromRemoteLocation(mediaType, isNativeFormat, sourceDocumentUri);
  
          if (services != null && !services.isEmpty()) {
              log.debug("Services found: {}. Registering ...", services.size());
              URI serviceUri;
              for (Service service : services) {
                  // 2nd Add the service
                  serviceUri = this.serviceManager.addService(service);
                  if (serviceUri != null) {
                      registeredServices.add(serviceUri);
                  }
              }
          }
  
          if (registeredServices.size() != services.size()) {
              log.warn("Found {} services in document {} but only imported {} services", services.size(),
                      sourceDocumentUri, registeredServices.size());
          }
  
          return registeredServices;
      }
docs: Registers all the services found on a given source document. This operation takes care of performing the
  appropriate format transformation. The source document is not stored on the server. For keeping a copy of the
  source document within the server use @see importServices instead.
  
  @param sourceDocumentUri
  @param mediaType
  @return the List of URIs of the services registered
  @throws SalException