stevenzwu commented on code in PR #15895:
URL: https://github.com/apache/iceberg/pull/15895#discussion_r3049387330


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api/src/main/java/org/apache/iceberg/catalog/SupportsReferencedBy.java:
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@@ -0,0 +1,45 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.iceberg.catalog;
+
+import java.util.List;
+import org.apache.iceberg.Table;
+import org.apache.iceberg.view.View;
+
+/** Catalog methods for loading tables and views with a referenced-by view 
chain. */
+public interface SupportsReferencedBy {

Review Comment:
   We have been using `TableIdentifier` for views probably because we don't 
want to introduce a `ViewIdentifier` exactly same as `TableIdentifier`.
   
   I would hope that we can align on one generic `CatalogObjectIdentifier` for 
all new REST spec and Java implementations.
   
https://docs.google.com/document/d/1NTQhgNbP2dkIMuXUMA5JdwliVQKCp1TU_ux5J_AaPiw/edit?tab=t.0#heading=h.lrmay9r6i8ai
   
   We probably don't need a specific view identifier in the REST spec. 
   
   My initial comment is if we need to support `referenced-by` for the 
relations endpoint. 



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