diff --git a/schema/base/water.yaml b/schema/base/water.yaml
index 3db107ed..584f3aba 100644
--- a/schema/base/water.yaml
+++ b/schema/base/water.yaml
@@ -86,3 +86,44 @@ properties:
       is_intermittent:
         description: Is it intermittent water or not
         type: boolean
+      is_disputed:
+        description: >-
+          Indicator if there are entities disputing this division boundary.
+          Information about entities disputing this boundary should be included in perspectives
+          property.
+
+          This property should also be true if boundary between two entities is unclear
+          and this is "best guess". So having it true and no perspectives gives map creators
+          reason not to fully trust the boundary, but use it if they have no other.
+        type: boolean
+      perspectives:
+        description: >-
+          Political perspectives from which this division boundary is considered
+          to be an accurate representation.
+      
+          If this property is absent, then this boundary is not known to
+          be disputed from any political perspective. Consequently,
+          there is only one boundary feature representing the entire
+          real world entity.
+      
+          If this property is present, it means the boundary represents
+          one of several alternative perspectives on the same real-world
+          entity.
+      
+          There are two modes of perspective:
+          
+            1. `accepted_by` means the representation of the boundary is
+               accepted by the listed entities and would be included on
+               a map drawn from their perspective.
+      
+            2. `disputed_by` means the representation of the boundary is
+               disputed by the listed entities and would be excluded
+               from a map drawn from their perspective.
+              
+          When drawing a map from the perspective of a given country,
+          one would start by gathering all the undisputed boundary
+          (with no `perspectives` property), and then adding to that
+          first all boundary explicitly accepted by the country, and
+          second all boundary not explicitly disputed by the country.
+        allOf: 
+          - "$ref": "./defs.yaml#/$defs/propertyDefinitions/perspectives"