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diff --git a/tools/test/misc/vds/UC_1.h b/tools/test/misc/vds/UC_1.h
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+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://www.hdfgroup.org/licenses.               *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#ifndef UC_1_H
+#define UC_1_H
+
+#include "hdf5.h"
+
+#include "UC_common.h"
+
+/*
+ * Definitions for VDS use case 1
+ *
+ * Datasets have a single unlimited dimension and two fixed dimensions. They
+ * are mapped along a single dimension in the VDS with no gaps between them.
+ */
+
+/* virtual dataset <---> source dataset mapping and sizes
+
+   *****************  --+
+   *       A       *    K
+   *****************  --+
+   *               *    |
+   *       B       *    N
+   *               *    |
+   *****************  --+
+   *       C       *
+   *****************
+   *               *
+   *       D       *
+   *               *
+   *****************
+   *       E       *
+   *****************
+   *               *
+   *       F       *
+   *               *
+   *****************
+
+   |               |
+   +-------M-------+
+
+
+        dim[0]
+       /
+      /
+     /
+    -----> dim[2]
+    |
+    |
+    |
+   dim[1]
+
+  */
+
+#define UC_1_N_SOURCES 6
+
+/* Dataset dimensions */
+#define UC_1_SM_HEIGHT    2  /* K */
+#define UC_1_LG_HEIGHT    4  /* N */
+#define UC_1_SM_LG_HEIGHT 6  /* SM_HEIGHT + LG_HEIGHT */
+#define UC_1_FULL_HEIGHT  18 /* (3 * K) + (3 * N) */
+#define UC_1_HALF_HEIGHT  9
+#define UC_1_WIDTH        8 /* M */
+#define UC_1_HALF_WIDTH   4
+
+#define UC_1_N_MAX_PLANES  H5S_UNLIMITED /* max number of planes         */
+#define UC_1_N_TEST_PLANES 5             /* number of planes we write    */
+
+/* Dataset datatypes */
+#define UC_1_SOURCE_DATATYPE H5T_STD_I32LE
+#define UC_1_VDS_DATATYPE    H5T_STD_I32LE
+
+/* Starting size of datasets, both source and VDS */
+static hsize_t UC_1_DIMS[UC_1_N_SOURCES][RANK] = {
+    {0, UC_1_SM_HEIGHT, UC_1_WIDTH}, {0, UC_1_LG_HEIGHT, UC_1_WIDTH}, {0, UC_1_SM_HEIGHT, UC_1_WIDTH},
+    {0, UC_1_LG_HEIGHT, UC_1_WIDTH}, {0, UC_1_SM_HEIGHT, UC_1_WIDTH}, {0, UC_1_LG_HEIGHT, UC_1_WIDTH}};
+
+/* Maximum size of datasets, both source and VDS */
+static hsize_t UC_1_MAX_DIMS[UC_1_N_SOURCES][RANK] = {
+    {UC_1_N_MAX_PLANES, UC_1_SM_HEIGHT, UC_1_WIDTH}, {UC_1_N_MAX_PLANES, UC_1_LG_HEIGHT, UC_1_WIDTH},
+    {UC_1_N_MAX_PLANES, UC_1_SM_HEIGHT, UC_1_WIDTH}, {UC_1_N_MAX_PLANES, UC_1_LG_HEIGHT, UC_1_WIDTH},
+    {UC_1_N_MAX_PLANES, UC_1_SM_HEIGHT, UC_1_WIDTH}, {UC_1_N_MAX_PLANES, UC_1_LG_HEIGHT, UC_1_WIDTH}};
+
+/* File names for source datasets */
+static char UC_1_FILE_NAMES[UC_1_N_SOURCES][NAME_LEN] = {{"1_a.h5"}, {"1_b.h5"}, {"1_c.h5"},
+                                                         {"1_d.h5"}, {"1_e.h5"}, {"1_f.h5"}};
+
+/* Dataset names */
+static char UC_1_SOURCE_DSET_PATH[NAME_LEN] = "/source_dset";
+
+#endif /* UC_1_H */