From 1f299a1d6c9e16818d3871b66f7b785402a44f50 Mon Sep 17 00:00:00 2001
From: Nils Hoffmann <3309580+nilshoffmann@users.noreply.github.com>
Date: Thu, 22 Aug 2024 09:45:31 +0100
Subject: [PATCH] Added proposed addition to simplify grouping of study
 variables.

---
 .../mzTab_format_specification_2_1-M_release.adoc  | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/specification_document-releases/2_1-Metabolomics-Release/mzTab_format_specification_2_1-M_release.adoc b/specification_document-releases/2_1-Metabolomics-Release/mzTab_format_specification_2_1-M_release.adoc
index 459dbfd..2bc97b5 100644
--- a/specification_document-releases/2_1-Metabolomics-Release/mzTab_format_specification_2_1-M_release.adoc
+++ b/specification_document-releases/2_1-Metabolomics-Release/mzTab_format_specification_2_1-M_release.adoc
@@ -1124,6 +1124,20 @@ MTD study_variable[1]-description Group B (spike-in 0.74 fmol/uL)
 ....
 |=============================================================================
 
+[[study_variable-category]]
+==== study_variable-category
+[cols=","]
+|=======================================================================================================================================================================
+|*Description* |Top-level study variable category allowing easier grouping of study variables with different values for the same group.
+|*Type* |Param
+|*Mandatory* |False
+|*Example* a|
+[subs="verbatim,quotes"]
+....
+MTD study_variable-category [,,Treatment,]
+....
+|=======================================================================================================================================================================
+
 [[study_variable1-n-factors]]
 ==== study_variable[1-n]-factors
 [cols=","]