From c8cc55221550c8f2786517fbb5055821c1550c7d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Philip=20J=C3=A4genstedt?= <philip@foolip.org>
Date: Mon, 24 Apr 2023 16:16:49 +0200
Subject: [PATCH 1/3] Allow multiple specification URLs

---
 schemas/defs.schema.json | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/schemas/defs.schema.json b/schemas/defs.schema.json
index 9fe230dada8..bc8b172ccbb 100644
--- a/schemas/defs.schema.json
+++ b/schemas/defs.schema.json
@@ -19,9 +19,23 @@
           "type": "array"
         },
         "spec": {
-          "description": "Specification URL",
-          "format": "uri",
-          "type": "string"
+          "anyOf": [
+            {
+              "description": "Specification URL",
+              "format": "uri",
+              "type": "string"
+            },
+            {
+              "items": {
+                "description": "Specification URL",
+                "format": "uri",
+                "type": "string"
+              },
+              "minItems": 2,
+              "type": "array"
+            }
+          ],
+          "description": "Specification"
         },
         "status": {
           "additionalProperties": false,
@@ -86,4 +100,4 @@
       "type": "object"
     }
   }
-}
\ No newline at end of file
+}

From 164f3e58d5fd456c2b5d34f4e2a2f59b0a1199b2 Mon Sep 17 00:00:00 2001
From: "Daniel D. Beck" <daniel@ddbeck.com>
Date: Thu, 4 May 2023 16:50:18 +0200
Subject: [PATCH 2/3] Update schema in TypeScript

---
 index.ts                 | 11 +++++++----
 schemas/defs.schema.json |  4 ++--
 2 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/index.ts b/index.ts
index edec2389533..4ab2959e7ae 100644
--- a/index.ts
+++ b/index.ts
@@ -6,10 +6,8 @@ import YAML from 'yaml';
 
 /** Web platform feature */
 export interface FeatureData {
-    /** Specification URL
-     * @format uri
-    */
-    spec: string;
+    /** Specification */
+    spec: specification_url | [specification_url, specification_url, ...specification_url[]];
     /** caniuse.com identifier */
     caniuse?: string;
     /** Whether a feature is considered a "baseline" web platform feature and when it achieved that status */
@@ -31,6 +29,11 @@ interface SupportStatus {
     support?: {[K in browserIdentifier]?: string};
 }
 
+/** Specification URL
+ * @format uri
+*/
+type specification_url = string;
+
 /** Usage stats URL
  * @format uri
 */
diff --git a/schemas/defs.schema.json b/schemas/defs.schema.json
index bc8b172ccbb..89a49cf3303 100644
--- a/schemas/defs.schema.json
+++ b/schemas/defs.schema.json
@@ -35,7 +35,7 @@
               "type": "array"
             }
           ],
-          "description": "Specification"
+          "description": "Specifications"
         },
         "status": {
           "additionalProperties": false,
@@ -100,4 +100,4 @@
       "type": "object"
     }
   }
-}
+}
\ No newline at end of file

From 2c13709f5220829a3da2acc776cf600a9594a0fd Mon Sep 17 00:00:00 2001
From: "Daniel D. Beck" <daniel@ddbeck.com>
Date: Thu, 4 May 2023 16:50:40 +0200
Subject: [PATCH 3/3] Check all spec URLs

---
 scripts/specs.ts | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/scripts/specs.ts b/scripts/specs.ts
index 2a429d0b4fa..65559a5af39 100644
--- a/scripts/specs.ts
+++ b/scripts/specs.ts
@@ -51,12 +51,15 @@ let checked = 0;
 let errors = 0;
 
 for (const [id, data] of Object.entries(features)) {
-    const url = new URL(data.spec);
-    if (!isOK(url)) {
-        console.error(`URL for ${id} not in web-specs: ${url.toString()}`);
-        errors++;
+    const specs = Array.isArray(data.spec) ? data.spec : [data.spec];
+    for (const spec of specs) {
+        const url = new URL(spec);
+        if (!isOK(url)) {
+            console.error(`URL for ${id} not in web-specs: ${url.toString()}`);
+            errors++;
+        }
+        checked++;
     }
-    checked++;
 }
 
 if (errors) {