# xdmf3 issue with join. Any solution ?

**URL:** https://discourse.paraview.org/t/xdmf3-issue-with-join-any-solution/2236
**Category:** ParaView Support
**Created:** [July 16, 2019, 3:40pm UTC](https://discourse.paraview.org/t/xdmf3-issue-with-join-any-solution/2236 "2019-07-16T15:40:00Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![GSS79](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/g/ee7513/32.png) [@GSS79](https://discourse.paraview.org/u/GSS79)
#### Post date: [July 16, 2019, 3:40pm UTC](https://discourse.paraview.org/t/xdmf3-issue-with-join-any-solution/2236/1 "2019-07-16T15:40:00Z")

</div>

Hi ,

Since the introduction of xdmf3 i’ve had an issue with our files. After some analysis and poking arround it seems it comes from the use of JOIN for the attributes to generate a vector from its components  
like this.

```
    <Attribute Name="Velocity" Center="Node" AttributeType="Vector">
       <DataItem ItemType="Function" Dimensions=" 34684 3" Function="join($0 , $1 , $2 )">
         <DataItem Format="HDF" Precision="8" DataType="Float" Dimensions=" 34684">
          trapvtx_sol_00027510.h5:./GaseousPhase/rhou
         </DataItem>
         <DataItem Format="HDF" Precision="8" DataType="Float" Dimensions=" 34684">
          trapvtx_sol_00027510.h5:./GaseousPhase/rhov
         </DataItem>
         <DataItem Format="HDF" Precision="8" DataType="Float" Dimensions=" 34684">
          trapvtx_sol_00027510.h5:./GaseousPhase/rhow
         </DataItem>
       </DataItem>
    </Attribute>

```

There is an old message mentionning this in 2017 but not follow up  
[https://public.kitware.com/pipermail/paraview/2017-February/039301.html](https://public.kitware.com/pipermail/paraview/2017-February/039301.html)

Any solution for this ?