diff --git a/abnf/odata-abnf-construction-rules.txt b/abnf/odata-abnf-construction-rules.txt
index ced5037..9faa960 100644
--- a/abnf/odata-abnf-construction-rules.txt
+++ b/abnf/odata-abnf-construction-rules.txt
@@ -525,6 +525,9 @@ rootExpr = %s"$root/" ( entitySetName   [ collectionNavigationExpr ]
 
 firstMemberExpr = memberExpr
                 / inscopeVariableExpr [ "/" memberExpr ]
+                / "$" request-id "/" memberExpr ; reference to single-valued response of earlier request
+                / "$" request-id collectionNavigationExpr ; reference to collection-valued response of earlier request
+                / "$" request-id
 
 memberExpr = directMemberExpr
            / ( optionallyQualifiedEntityTypeName / optionallyQualifiedComplexTypeName ) "/" directMemberExpr
diff --git a/abnf/odata-abnf-testcases.yaml b/abnf/odata-abnf-testcases.yaml
index fa8cc5e..4970d49 100644
--- a/abnf/odata-abnf-testcases.yaml
+++ b/abnf/odata-abnf-testcases.yaml
@@ -250,6 +250,10 @@ Constraints:
     - Title
     - X
     - ZipCode
+  request-id:
+    - '1'
+    - First-Insert~Customer_1.1
+    - group1
   singletonEntity:
     - BestProductEverCreated
     - MainSupplier
@@ -2268,6 +2272,26 @@ TestCases:
     Rule: odataRelativeUri
     Input: Customers?$select=Addresses(@a=$this;$filter=endswith(@a/Street,'gasse'))
 
+  - Name: request reference in $batch
+    Rule: commonExpr
+    Input: Customer eq $1
+    Expect:
+      - firstMemberExpr:Customer
+      - firstMemberExpr:$1
+
+  - Name: property reference in $batch
+    Rule: commonExpr
+    Input: Customer/Name eq $1/Name
+    Expect:
+      - memberExpr:Customer/Name
+      - memberExpr:Name
+
+  - Name: member reference in $batch
+    Rule: commonExpr
+    Input: Customer/Name eq $1('ALFKI')/Name
+    Expect:
+      - collectionNavigationExpr:('ALFKI')/Name
+
   - Name: 5.1.1.15 Path expressions
     Rule: commonExpr
     Input: Items
diff --git a/abnf/odata-aggregation-testcases.yaml b/abnf/odata-aggregation-testcases.yaml
index a7e6e85..d3a902a 100644
--- a/abnf/odata-aggregation-testcases.yaml
+++ b/abnf/odata-aggregation-testcases.yaml
@@ -238,6 +238,8 @@ Constraints:
     - Total # dynamic
     - WeightedAmount # dynamic
     - Year
+  request-id:
+    - group1
   streamProperty:
     - Image
   termName: