[backport: v5.1.1] add missing key to structure_power field

see #676

CHANGELOG.md

@@ -17,6 +17,14 @@ _Breaking developer changes, which may affect downstream projects or sites that
 [@xxxx]: https://github.com/xxxx
 -->
 
+# 5.1.1
+
+#### Bugfixes
+* Fix a bug causing `undefined` to be used as the tag key in the `structure` field ([#676])
+
+[#676]: https://github.com/openstreetmap/id-tagging-schema/issues/676
+
+
 # 5.1.0
 
 #### :mega: Release Highlights

data/fields/structure_power.json

@@ -1,5 +1,6 @@
 {
     "type": "combo",
+    "key": "structure",
     "label": "Structure",
     "strings": {
         "options": {

dist/fields.json

@@ -3677,6 +3677,7 @@
     },
     "structure_power": {
         "type": "combo",
+        "key": "structure",
         "autoSuggestions": false,
         "customValues": false,
         "options": [

dist/taginfo.json

@@ -18672,6 +18672,25 @@
             "key": "stroller",
             "description": "🄵 Stroller Access"
         },
+        {
+            "key": "structure",
+            "description": "🄵 Structure"
+        },
+        {
+            "key": "structure",
+            "value": "lattice",
+            "description": "🄵🅅 Structure: Lattice"
+        },
+        {
+            "key": "structure",
+            "value": "solid",
+            "description": "🄵🅅 Structure: Solid"
+        },
+        {
+            "key": "structure",
+            "value": "tubular",
+            "description": "🄵🅅 Structure: Tubular"
+        },
         {
             "key": "tunnel",
             "description": "🄵 Structure, 🄵 Type"

package.json

@@ -1,7 +1,7 @@
 {
   "type": "module",
   "name": "@openstreetmap/id-tagging-schema",
-  "version": "5.1.0",
+  "version": "5.1.1",
   "description": "The OpenStreetMap tagging model used by the iD editor",
   "homepage": "https://github.com/openstreetmap/id-tagging-schema#readme",
   "bugs": "https://github.com/openstreetmap/id-tagging-schema/issues",