The openPMD standard is not quite clear if unitSI is required for patch record components. At least for numParticles and numParticlesOffset, they don't really make sense.
The openPMD-api currently requires that these attributes are set and will fail at reading time if they are not (and subsequently skip the components).
With this PR, the openPMD-api ignores if they are not present, but still writes them to maintain compatibility with versions of the openPMD-api that are not so lenient.
The openPMD standard is not quite clear if
unitSIis required for patch record components. At least fornumParticlesandnumParticlesOffset, they don't really make sense. The openPMD-api currently requires that these attributes are set and will fail at reading time if they are not (and subsequently skip the components).With this PR, the openPMD-api ignores if they are not present, but still writes them to maintain compatibility with versions of the openPMD-api that are not so lenient.