diff --git a/schemas/materials/compilation.schema.yaml b/schemas/materials/compilation.schema.yaml
index 569feb21e..a86efcc84 100644
--- a/schemas/materials/compilation.schema.yaml
+++ b/schemas/materials/compilation.schema.yaml
@@ -63,7 +63,7 @@ properties:
           have access to the full representation by some other means)
 
     allOf:
-      - true
+      - {}
 
   sources:
     type: array
diff --git a/schemas/pointer.schema.yaml b/schemas/pointer.schema.yaml
index cf0ec1683..b28b22a60 100644
--- a/schemas/pointer.schema.yaml
+++ b/schemas/pointer.schema.yaml
@@ -11,12 +11,9 @@ description: |
 
 type: object
 
-if:
-  required: [location]
-then:
-  $ref: "schema:ethdebug/format/pointer/region"
-else:
-  $ref: "schema:ethdebug/format/pointer/collection"
+oneOf:
+  - $ref: "schema:ethdebug/format/pointer/region"
+  - $ref: "schema:ethdebug/format/pointer/collection"
 
 examples:
   - # example: a single particular storage slot
diff --git a/schemas/pointer/collection.schema.yaml b/schemas/pointer/collection.schema.yaml
index c01705112..a9bde682c 100644
--- a/schemas/pointer/collection.schema.yaml
+++ b/schemas/pointer/collection.schema.yaml
@@ -5,41 +5,11 @@ title: ethdebug/format/pointer/collection
 description: |
   A representation of a collection of pointers to data in the EVM
 type: object
-allOf:
-  - oneOf:
-      - required: [group]
-      - required: [list]
-      - required: [if]
-      - required: [define]
-      - required: [template]
-      - required: [templates]
 
-  - if:
-      required: [group]
-    then:
-      $ref: "schema:ethdebug/format/pointer/collection/group"
-
-  - if:
-      required: [list]
-    then:
-      $ref: "schema:ethdebug/format/pointer/collection/list"
-
-  - if:
-      required: [if]
-    then:
-      $ref: "schema:ethdebug/format/pointer/collection/conditional"
-
-  - if:
-      required: [define]
-    then:
-      $ref: "schema:ethdebug/format/pointer/collection/scope"
-
-  - if:
-      required: [template]
-    then:
-      $ref: "schema:ethdebug/format/pointer/collection/reference"
-
-  - if:
-      required: [templates]
-    then:
-      $ref: "schema:ethdebug/format/pointer/collection/templates"
+oneOf:
+  - $ref: "schema:ethdebug/format/pointer/collection/group"
+  - $ref: "schema:ethdebug/format/pointer/collection/list"
+  - $ref: "schema:ethdebug/format/pointer/collection/conditional"
+  - $ref: "schema:ethdebug/format/pointer/collection/scope"
+  - $ref: "schema:ethdebug/format/pointer/collection/reference"
+  - $ref: "schema:ethdebug/format/pointer/collection/templates"
diff --git a/schemas/pointer/region.schema.yaml b/schemas/pointer/region.schema.yaml
index 0ab06a053..1a8b6842e 100644
--- a/schemas/pointer/region.schema.yaml
+++ b/schemas/pointer/region.schema.yaml
@@ -5,61 +5,19 @@ title: ethdebug/format/pointer/region
 description: |
   A representation of a region of data in the EVM
 type: object
+
 properties:
   location:
     $ref: "#/$defs/Location"
 
-allOf:
-  - if:
-      properties:
-        location:
-          const: stack
-
-    then:
-      $ref: "schema:ethdebug/format/pointer/region/stack"
-
-  - if:
-      properties:
-        location:
-          const: memory
-
-    then:
-      $ref: "schema:ethdebug/format/pointer/region/memory"
-
-  - if:
-      properties:
-        location:
-          const: storage
-    then:
-      $ref: "schema:ethdebug/format/pointer/region/storage"
-
-  - if:
-      properties:
-        location:
-          const: calldata
-    then:
-      $ref: "schema:ethdebug/format/pointer/region/calldata"
-
-  - if:
-      properties:
-        location:
-          const: returndata
-    then:
-      $ref: "schema:ethdebug/format/pointer/region/returndata"
-
-  - if:
-      properties:
-        location:
-          const: transient
-    then:
-      $ref: "schema:ethdebug/format/pointer/region/transient"
-
-  - if:
-      properties:
-        location:
-          const: code
-    then:
-      $ref: "schema:ethdebug/format/pointer/region/code"
+oneOf:
+  - $ref: "schema:ethdebug/format/pointer/region/stack"
+  - $ref: "schema:ethdebug/format/pointer/region/memory"
+  - $ref: "schema:ethdebug/format/pointer/region/storage"
+  - $ref: "schema:ethdebug/format/pointer/region/calldata"
+  - $ref: "schema:ethdebug/format/pointer/region/returndata"
+  - $ref: "schema:ethdebug/format/pointer/region/transient"
+  - $ref: "schema:ethdebug/format/pointer/region/code"
 
 $defs:
   Location:
diff --git a/schemas/pointer/region/base.schema.yaml b/schemas/pointer/region/base.schema.yaml
index 1782352e8..6e89b93d0 100644
--- a/schemas/pointer/region/base.schema.yaml
+++ b/schemas/pointer/region/base.schema.yaml
@@ -11,11 +11,23 @@ properties:
     $ref: "schema:ethdebug/format/pointer/identifier"
 
   location:
-    type: string
+    $ref: "#/$defs/Location"
 
 required:
   - location
 
+$defs:
+  Location:
+    type: string
+    enum:
+      - stack
+      - memory
+      - storage
+      - calldata
+      - returndata
+      - transient
+      - code
+
 examples:
   - name: "array-item"
     location: memory