From ad913f0100aa1d994ca10fc6ed13c491e0f2e582 Mon Sep 17 00:00:00 2001
From: Oded Arbel <oded@geek.co.il>
Date: Sun, 7 Feb 2021 11:29:01 +0200
Subject: [PATCH] write boolean value according to
 http://docs.oasis-open.org/office/v1.2/os/OpenDocument-v1.2-os-part1.html#datatype-boolean
 instead of just "1" for true or "" for false;

---
 src/Spout/Writer/ODS/Manager/WorksheetManager.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Spout/Writer/ODS/Manager/WorksheetManager.php b/src/Spout/Writer/ODS/Manager/WorksheetManager.php
index 4dfe9c8..0d6942e 100644
--- a/src/Spout/Writer/ODS/Manager/WorksheetManager.php
+++ b/src/Spout/Writer/ODS/Manager/WorksheetManager.php
@@ -197,7 +197,8 @@ class WorksheetManager implements WorksheetManagerInterface
 
             $data .= '</table:table-cell>';
         } elseif ($cell->isBoolean()) {
-            $data .= ' office:value-type="boolean" calcext:value-type="boolean" office:boolean-value="' . $cell->getValue() . '">';
+            $value = $cell->getValue() ? 'true' : 'false';
+            $data .= ' office:value-type="boolean" calcext:value-type="boolean" office:boolean-value="' . $value . '">';
             $data .= '<text:p>' . $cell->getValue() . '</text:p>';
             $data .= '</table:table-cell>';
         } elseif ($cell->isNumeric()) {