code: private static DataSet<Tuple2<String, String>> getDocumentsDataSet(ExecutionEnvironment env, ParameterTool params) {
  		// Create DataSet for documents relation (URL, Doc-Text)
  		if (params.has("documents")) {
  			return env.readCsvFile(params.get("documents"))
  						.fieldDelimiter("|")
  						.types(String.class, String.class);
  		} else {
  			System.out.println("Executing WebLogAnalysis example with default documents data set.");
  			System.out.println("Use --documents to specify file input.");
  			return WebLogData.getDocumentDataSet(env);
  		}
  	}
docs: *************************************************************************