--- a/src/CLIParser.h	Sat Jan 19 21:16:39 2019 +0100
+++ b/src/CLIParser.h	Sat Jan 19 21:21:26 2019 +0100
@@ -56,6 +56,7 @@
 	static const string_t OPTION_XATTR;
 	static const string_t OPTION_AS;
 	static const string_t OPTION_OPTION;
+	static const string_t OPTION_RELATION;
 
 	Configuration parse(const std::vector<string_t>& arguments) {
 		Configuration c;
@@ -78,6 +79,8 @@
 				} else if (option == OPTION_OPTION) {
 					currentOptions.push_back(readNext(arguments, i));
 					currentOptions.push_back(readNext(arguments, i));
+				} else if (option == OPTION_RELATION) {
+					c.relation = readNext(arguments, i);
 				} else {
 					throw relpipe::cli::RelpipeCLIException(L"Unsupported CLI option: " + option, relpipe::cli::CLI::EXIT_CODE_BAD_CLI_ARGUMENTS);
 				}
@@ -114,6 +117,7 @@
 const string_t CLIParser::OPTION_XATTR = L"--" + RequestedField::GROUP_XATTR;
 const string_t CLIParser::OPTION_AS = L"--as";
 const string_t CLIParser::OPTION_OPTION = L"--option";
+const string_t CLIParser::OPTION_RELATION = L"--relation";
 
 }
 }