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Expected output for 'h5dump --xml tudlink.h5'
#############################
<?xml version="1.0" encoding="UTF-8"?>
<hdf5:HDF5-File xmlns:hdf5="http://hdfgroup.org/DTDs/HDF5-File" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://hdfgroup.org/DTDs/HDF5File http://hdfgroup.org/DTDs/HDF5-File.xsd">
<hdf5:RootGroup OBJ-XID="xid_96" H5Path="/">
   <hdf5:UserDefined LinkName="udlink1" OBJ-XID="xid_18446744073709551614" H5SourcePath="/udlink1" LinkClass="187"  Parents="xid_96" H5ParentPaths="/" />
   <hdf5:UserDefined LinkName="udlink2" OBJ-XID="xid_18446744073709551613" H5SourcePath="/udlink2" LinkClass="187"  Parents="xid_96" H5ParentPaths="/" />
</hdf5:RootGroup>
</hdf5:HDF5-File>