diff --git a/jena-extras/jena-querybuilder/src/main/java/org/apache/jena/arq/querybuilder/rewriters/BuildElementVisitor.java b/jena-extras/jena-querybuilder/src/main/java/org/apache/jena/arq/querybuilder/rewriters/BuildElementVisitor.java
index 5a1a1185d84..6e21ddc0564 100644
--- a/jena-extras/jena-querybuilder/src/main/java/org/apache/jena/arq/querybuilder/rewriters/BuildElementVisitor.java
+++ b/jena-extras/jena-querybuilder/src/main/java/org/apache/jena/arq/querybuilder/rewriters/BuildElementVisitor.java
@@ -20,24 +20,7 @@
 import java.util.List;
 
 import org.apache.jena.arq.querybuilder.handlers.WhereHandler;
-import org.apache.jena.sparql.syntax.Element;
-import org.apache.jena.sparql.syntax.ElementAssign;
-import org.apache.jena.sparql.syntax.ElementBind;
-import org.apache.jena.sparql.syntax.ElementData;
-import org.apache.jena.sparql.syntax.ElementDataset;
-import org.apache.jena.sparql.syntax.ElementExists;
-import org.apache.jena.sparql.syntax.ElementFilter;
-import org.apache.jena.sparql.syntax.ElementGroup;
-import org.apache.jena.sparql.syntax.ElementMinus;
-import org.apache.jena.sparql.syntax.ElementNamedGraph;
-import org.apache.jena.sparql.syntax.ElementNotExists;
-import org.apache.jena.sparql.syntax.ElementOptional;
-import org.apache.jena.sparql.syntax.ElementPathBlock;
-import org.apache.jena.sparql.syntax.ElementService;
-import org.apache.jena.sparql.syntax.ElementSubQuery;
-import org.apache.jena.sparql.syntax.ElementTriplesBlock;
-import org.apache.jena.sparql.syntax.ElementUnion;
-import org.apache.jena.sparql.syntax.ElementVisitor;
+import org.apache.jena.sparql.syntax.*;
 
 /**
  * An element visitor that does an in-place modification of the elements to fix
@@ -114,6 +97,17 @@ public void visit(ElementUnion el) {
         }
     }
 
+    @Override
+    public void visit(ElementLateral el) {
+        el.getLateralElement().visit(this);
+        if (result == el.getLateralElement()) {
+            result = el;
+        } else {
+            result = new ElementOptional(result);
+        }
+    }
+
+
     @Override
     public void visit(ElementOptional el) {
         el.getOptionalElement().visit(this);
diff --git a/jena-extras/jena-querybuilder/src/main/java/org/apache/jena/arq/querybuilder/rewriters/ElementRewriter.java b/jena-extras/jena-querybuilder/src/main/java/org/apache/jena/arq/querybuilder/rewriters/ElementRewriter.java
index c3528bbce49..969ebaa63ec 100644
--- a/jena-extras/jena-querybuilder/src/main/java/org/apache/jena/arq/querybuilder/rewriters/ElementRewriter.java
+++ b/jena-extras/jena-querybuilder/src/main/java/org/apache/jena/arq/querybuilder/rewriters/ElementRewriter.java
@@ -27,24 +27,7 @@
 import org.apache.jena.sparql.core.TriplePath;
 import org.apache.jena.sparql.core.Var;
 import org.apache.jena.sparql.engine.binding.Binding;
-import org.apache.jena.sparql.syntax.Element;
-import org.apache.jena.sparql.syntax.ElementAssign;
-import org.apache.jena.sparql.syntax.ElementBind;
-import org.apache.jena.sparql.syntax.ElementData;
-import org.apache.jena.sparql.syntax.ElementDataset;
-import org.apache.jena.sparql.syntax.ElementExists;
-import org.apache.jena.sparql.syntax.ElementFilter;
-import org.apache.jena.sparql.syntax.ElementGroup;
-import org.apache.jena.sparql.syntax.ElementMinus;
-import org.apache.jena.sparql.syntax.ElementNamedGraph;
-import org.apache.jena.sparql.syntax.ElementNotExists;
-import org.apache.jena.sparql.syntax.ElementOptional;
-import org.apache.jena.sparql.syntax.ElementPathBlock;
-import org.apache.jena.sparql.syntax.ElementService;
-import org.apache.jena.sparql.syntax.ElementSubQuery;
-import org.apache.jena.sparql.syntax.ElementTriplesBlock;
-import org.apache.jena.sparql.syntax.ElementUnion;
-import org.apache.jena.sparql.syntax.ElementVisitor;
+import org.apache.jena.sparql.syntax.*;
 
 /**
  * A rewriter that implements an ElementVisitor
@@ -54,7 +37,7 @@ public class ElementRewriter extends AbstractRewriter<Element> implements Elemen
 
     /**
      * Constructor
-     * 
+     *
      * @param values The values to rewrite with.
      */
     public ElementRewriter(Map<Var, Node> values) {
@@ -140,6 +123,12 @@ public void visit(ElementUnion el) {
         push(retval);
     }
 
+    @Override
+    public void visit(ElementLateral el) {
+        el.getLateralElement().visit(this);
+        push(new ElementLateral(getResult()));
+    }
+
     @Override
     public void visit(ElementOptional el) {
         el.getOptionalElement().visit(this);
diff --git a/jena-extras/jena-querybuilder/src/main/java/org/apache/jena/arq/querybuilder/rewriters/OpRewriter.java b/jena-extras/jena-querybuilder/src/main/java/org/apache/jena/arq/querybuilder/rewriters/OpRewriter.java
index 719927fb37e..65a80d9fce1 100644
--- a/jena-extras/jena-querybuilder/src/main/java/org/apache/jena/arq/querybuilder/rewriters/OpRewriter.java
+++ b/jena-extras/jena-querybuilder/src/main/java/org/apache/jena/arq/querybuilder/rewriters/OpRewriter.java
@@ -27,46 +27,9 @@
 import org.apache.jena.sparql.algebra.Op;
 import org.apache.jena.sparql.algebra.OpVisitor;
 import org.apache.jena.sparql.algebra.Table;
-import org.apache.jena.sparql.algebra.op.OpAssign;
-import org.apache.jena.sparql.algebra.op.OpBGP;
-import org.apache.jena.sparql.algebra.op.OpConditional;
-import org.apache.jena.sparql.algebra.op.OpDatasetNames;
-import org.apache.jena.sparql.algebra.op.OpDiff;
-import org.apache.jena.sparql.algebra.op.OpDisjunction;
-import org.apache.jena.sparql.algebra.op.OpDistinct;
-import org.apache.jena.sparql.algebra.op.OpExt;
-import org.apache.jena.sparql.algebra.op.OpExtend;
-import org.apache.jena.sparql.algebra.op.OpFilter;
-import org.apache.jena.sparql.algebra.op.OpGraph;
-import org.apache.jena.sparql.algebra.op.OpGroup;
-import org.apache.jena.sparql.algebra.op.OpJoin;
-import org.apache.jena.sparql.algebra.op.OpLabel;
-import org.apache.jena.sparql.algebra.op.OpLeftJoin;
-import org.apache.jena.sparql.algebra.op.OpList;
-import org.apache.jena.sparql.algebra.op.OpMinus;
-import org.apache.jena.sparql.algebra.op.OpNull;
-import org.apache.jena.sparql.algebra.op.OpOrder;
-import org.apache.jena.sparql.algebra.op.OpPath;
-import org.apache.jena.sparql.algebra.op.OpProcedure;
-import org.apache.jena.sparql.algebra.op.OpProject;
-import org.apache.jena.sparql.algebra.op.OpPropFunc;
-import org.apache.jena.sparql.algebra.op.OpQuad;
-import org.apache.jena.sparql.algebra.op.OpQuadBlock;
-import org.apache.jena.sparql.algebra.op.OpQuadPattern;
-import org.apache.jena.sparql.algebra.op.OpReduced;
-import org.apache.jena.sparql.algebra.op.OpSequence;
-import org.apache.jena.sparql.algebra.op.OpService;
-import org.apache.jena.sparql.algebra.op.OpSlice;
-import org.apache.jena.sparql.algebra.op.OpTable;
-import org.apache.jena.sparql.algebra.op.OpTopN;
-import org.apache.jena.sparql.algebra.op.OpTriple;
-import org.apache.jena.sparql.algebra.op.OpUnion;
+import org.apache.jena.sparql.algebra.op.*;
 import org.apache.jena.sparql.algebra.table.TableN;
-import org.apache.jena.sparql.core.BasicPattern;
-import org.apache.jena.sparql.core.Quad;
-import org.apache.jena.sparql.core.QuadPattern;
-import org.apache.jena.sparql.core.Var;
-import org.apache.jena.sparql.core.VarExprList;
+import org.apache.jena.sparql.core.*;
 import org.apache.jena.sparql.engine.binding.Binding;
 import org.apache.jena.sparql.expr.ExprAggregator;
 import org.apache.jena.sparql.expr.ExprList;
@@ -80,7 +43,7 @@ class OpRewriter extends AbstractRewriter<Op> implements OpVisitor {
 
     /**
      * Constructor.
-     * 
+     *
      * @param values The values to replace.
      */
     OpRewriter(Map<Var, Node> values) {
@@ -275,6 +238,13 @@ public void visit(OpMinus opMinus) {
         push(OpMinus.create(pop(), pop()));
     }
 
+    @Override
+    public void visit(OpLateral opLateral) {
+        opLateral.getRight().visit(this);
+        opLateral.getLeft().visit(this);
+        push(OpLateral.create(pop(), pop()));
+    }
+
     @Override
     public void visit(OpConditional opCondition) {
         opCondition.getRight().visit(this);
diff --git a/jena-extras/jena-querybuilder/src/main/java/org/apache/jena/arq/querybuilder/updatebuilder/QuadIteratorBuilder.java b/jena-extras/jena-querybuilder/src/main/java/org/apache/jena/arq/querybuilder/updatebuilder/QuadIteratorBuilder.java
index 54247bb1486..39be11c8703 100644
--- a/jena-extras/jena-querybuilder/src/main/java/org/apache/jena/arq/querybuilder/updatebuilder/QuadIteratorBuilder.java
+++ b/jena-extras/jena-querybuilder/src/main/java/org/apache/jena/arq/querybuilder/updatebuilder/QuadIteratorBuilder.java
@@ -26,24 +26,7 @@
 import org.apache.jena.query.QueryParseException;
 import org.apache.jena.sparql.core.Quad;
 import org.apache.jena.sparql.core.TriplePath;
-import org.apache.jena.sparql.syntax.Element;
-import org.apache.jena.sparql.syntax.ElementAssign;
-import org.apache.jena.sparql.syntax.ElementBind;
-import org.apache.jena.sparql.syntax.ElementData;
-import org.apache.jena.sparql.syntax.ElementDataset;
-import org.apache.jena.sparql.syntax.ElementExists;
-import org.apache.jena.sparql.syntax.ElementFilter;
-import org.apache.jena.sparql.syntax.ElementGroup;
-import org.apache.jena.sparql.syntax.ElementMinus;
-import org.apache.jena.sparql.syntax.ElementNamedGraph;
-import org.apache.jena.sparql.syntax.ElementNotExists;
-import org.apache.jena.sparql.syntax.ElementOptional;
-import org.apache.jena.sparql.syntax.ElementPathBlock;
-import org.apache.jena.sparql.syntax.ElementService;
-import org.apache.jena.sparql.syntax.ElementSubQuery;
-import org.apache.jena.sparql.syntax.ElementTriplesBlock;
-import org.apache.jena.sparql.syntax.ElementUnion;
-import org.apache.jena.sparql.syntax.ElementVisitor;
+import org.apache.jena.sparql.syntax.*;
 import org.apache.jena.util.iterator.ExtendedIterator;
 import org.apache.jena.util.iterator.WrappedIterator;
 
@@ -69,7 +52,7 @@ public Quad apply(Triple triple) {
 
     /**
      * Constructor.
-     * 
+     *
      * @param defaultGraph the default graph name.
      */
     QuadIteratorBuilder(Node defaultGraph) {
@@ -120,6 +103,11 @@ public void visit(ElementUnion el) {
         }
     }
 
+    @Override
+    public void visit(ElementLateral el) {
+        throw new QueryParseException("lateral not permitted in data quad", -1, -1);
+    }
+
     @Override
     public void visit(ElementOptional el) {
         throw new QueryParseException("optional not permitted in data quad", -1, -1);
diff --git a/jena-extras/jena-querybuilder/src/test/java/org/apache/jena/arq/querybuilder/WhereValidator.java b/jena-extras/jena-querybuilder/src/test/java/org/apache/jena/arq/querybuilder/WhereValidator.java
index c1f188cd942..b94c3d8052c 100644
--- a/jena-extras/jena-querybuilder/src/test/java/org/apache/jena/arq/querybuilder/WhereValidator.java
+++ b/jena-extras/jena-querybuilder/src/test/java/org/apache/jena/arq/querybuilder/WhereValidator.java
@@ -19,24 +19,7 @@
 
 import java.util.List;
 
-import org.apache.jena.sparql.syntax.Element;
-import org.apache.jena.sparql.syntax.ElementAssign;
-import org.apache.jena.sparql.syntax.ElementBind;
-import org.apache.jena.sparql.syntax.ElementData;
-import org.apache.jena.sparql.syntax.ElementDataset;
-import org.apache.jena.sparql.syntax.ElementExists;
-import org.apache.jena.sparql.syntax.ElementFilter;
-import org.apache.jena.sparql.syntax.ElementGroup;
-import org.apache.jena.sparql.syntax.ElementMinus;
-import org.apache.jena.sparql.syntax.ElementNamedGraph;
-import org.apache.jena.sparql.syntax.ElementNotExists;
-import org.apache.jena.sparql.syntax.ElementOptional;
-import org.apache.jena.sparql.syntax.ElementPathBlock;
-import org.apache.jena.sparql.syntax.ElementService;
-import org.apache.jena.sparql.syntax.ElementSubQuery;
-import org.apache.jena.sparql.syntax.ElementTriplesBlock;
-import org.apache.jena.sparql.syntax.ElementUnion;
-import org.apache.jena.sparql.syntax.ElementVisitor;
+import org.apache.jena.sparql.syntax.*;
 import org.apache.jena.sparql.util.NodeIsomorphismMap;
 
 /**
@@ -131,6 +114,14 @@ public void visit(ElementUnion el) {
         return;
     }
 
+    @Override
+    public void visit(ElementLateral el) {
+        checkMatching(el);
+        if (!matching) {
+            el.getLateralElement().visit(this);
+        }
+    }
+
     @Override
     public void visit(ElementOptional el) {
         checkMatching(el);