diff --git a/PROJECT_GOAL.md b/PROJECT_GOAL.md
index 5e3cbdca..ea42c79d 100644
--- a/PROJECT_GOAL.md
+++ b/PROJECT_GOAL.md
@@ -632,6 +632,14 @@ Requirements:
 - Strong, standardized specification.
 - Strong, standardized API.
 
+#### Textual notation
+
+Requirements:
+- Should not have visual noise and clutter.
+- Should have means to reduce cognitive load when developing system models.
+- Should be easily editable by humans. And AI agents.
+- System engineers should be able to easily develop system models (both big and small) using textual notation only.
+
 ### UI
 
 The focus should be on reducing system engineer's cognitive load when creating / working with a system model. Regardless of the model size (big or small).