introduce allowlist for disconnectable relation types

CHANGELOG.md

@@ -48,6 +48,7 @@ _Breaking developer changes, which may affect downstream projects or sites that
 #### :camera: Street-Level
 * Rename OpenStreetCam overlay to KartaView ([#8807])
 #### :white_check_mark: Validation
+* Allow disconnecting members of certain "grouping" types of relation ([#8771])
 * Clarify description of "disconnected way" validation rule ([#8800])
 #### :bug: Bugfixes
 * Fix hidden tooltips on map control toolbar ([#8781])
@@ -60,6 +61,7 @@ _Breaking developer changes, which may affect downstream projects or sites that
 * Add colours for preset categories ([#8799])
 #### :hammer: Development
 
+[#8771]: https://github.com/openstreetmap/iD/issues/8771
 [#8781]: https://github.com/openstreetmap/iD/issues/8781
 [#8792]: https://github.com/openstreetmap/iD/pull/8792
 [#8796]: https://github.com/openstreetmap/iD/issues/8796

modules/actions/disconnect.js

@@ -18,6 +18,11 @@ import { osmNode } from '../osm/node';
 export function actionDisconnect(nodeId, newNodeId) {
     var wayIds;
 
+    var disconnectableRelationTypes = {
+        'associatedStreet': true,
+        'enforcement': true,
+        'site': true,
+    };
 
     var action = function(graph) {
         var node = graph.entity(nodeId);
@@ -88,7 +93,9 @@ export function actionDisconnect(nodeId, newNodeId) {
 
         parentWays.forEach(function(way) {
             var relations = graph.parentRelations(way);
-            relations.forEach(function(relation) {
+            relations
+            .filter(relation => !disconnectableRelationTypes[relation.tags.type])
+            .forEach(function(relation) {
                 if (relation.id in seenRelationIds) {
                     if (wayIds) {
                         if (wayIds.indexOf(way.id) !== -1 ||