[thredds] XHTML in documentation element

[Egil Støren <egils@xxxxxx>]

Hi,

According to the thredds documentation, the documentation element may
contain arbitrary plain text content, or XHTML (see
https://www.unidata.ucar.edu/software/thredds/v4.6/tds/catalog/InvCatalogSpec.html#documentation).
I have tried xhtml without any success. Can someone provide an example on
how this can be done?

Best regards,

   Egil Støren
   MET Norway