From 0b41be90d9c50dbdc9e0238c9ad8a7c545ed4c94 Mon Sep 17 00:00:00 2001
From: Minh Vuong <vuongxuongminh@gmail.com>
Date: Mon, 18 Mar 2024 23:29:24 +0700
Subject: [PATCH] docs: add rules to remember when merging sub schemas

---
 README.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/README.md b/README.md
index f534d4c..77d313a 100644
--- a/README.md
+++ b/README.md
@@ -117,6 +117,12 @@ var_dump(SchemaPrinter::doPrint($schemaGateway));
 var_dump(GraphQL::executeQuery($schemaGateway, $query)->toArray());
 ``` 
 
+
+**Rules when merging sub schemas:**
+
++ Top-level field names need to be unique across all merged schemas (case-sensitive match).
++ Types with the exact same name and structure will be merged. But types with the same name but different structure will result in type conflicts.
+
 Inspiration
 -----------