Fluent.msh to XDMF; error

mesh
11

I see that for some reason my .xdmf file does not contain the part “boundaries”, which is probably why it cant load it in. this is how the xdmf file looks like:

 <Xdmf Version="3.0">
  <Domain>
<Grid Name="Grid">
  <Information Name="Information" Value="0"><![CDATA[<main/>]]></Information>
  <Geometry GeometryType="XYZ">
    <DataItem DataType="Float" Dimensions="81012 3" Format="HDF" Precision="8">fluentme.h5:/data0</DataItem>
  </Geometry>
  <Topology TopologyType="Triangle" NumberOfElements="860292">
    <DataItem DataType="Int" Dimensions="860292 3" Format="HDF" Precision="8">fluentme.h5:/data1</DataItem>
  </Topology>
 </Grid>
</Domain>
</Xdmf>

I would not know where I needed to add the boundaries part.

The picture shows my xdmf file vs an old one from another researcher that worked with the code. I do not know why they are different and if that is due to an error made by me. The other file clearly has a boundaries part whereas I do not. How can I be sure to have this boundaries function?
Cheers,
Jack

xdmff
xdmff1792×814 87.4 KB