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    <p><font size="4">Dear Nexus community,</font></p>
    <p><font size="4">I would like to </font><font size="4"><font
          size="4">enquire</font> to any of the XAS users here about the
        structure they employ to build hdf5 files when XAS is used to
        study chemical reactions. For this specific problem, here in
        ALBA the user needs to collect the XAS spectra every few minutes
        as well as the temperature, pressure, and the </font><font
        size="4"><font size="4">concentrations of the involved </font>chemical
        species (reactants and products) every several seconds. This
        data collection takes place during long periods of </font><font
        size="4"><font size="4">time of up to a few days.</font> <br>
      </font></p>
    <p><font size="4">Hence, I would to know if it would be more
        convenient to lump all these measurements in one NXentry, which
        would contain data and metadata for all these physico-chemical
        properties; or instead, to write different NXentries for each
        one of them (e.g. one NXentry for temperature, another one for
        pressure, and so on).<br>
      </font></p>
    <p><font size="4">Sincerely,<br>
      </font></p>
    <br>
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                          font-family: 'Arial', sans-serif; font-size:
                          12pt; font-weight: bold"> Fernan Saiz, PhD </span></td>
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                          font-family: 'Arial', sans-serif; font-weight:
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                          Management Engineering - Computing Division </span></td>
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