photcal_PARAM.xml

<GROUP name="PHOTCAL" ID="phot_sys" ucd="phot" 
       utype="PhotDM:PhotCal" > 
       <DESCRIPTION>Photometric system description </DESCRIPTION>
       <PARAM name="filterIdentifier" ucd="meta.id;instr.filter" 
              utype="photDM:PhotometryFilter.identifier" 
              datatype="char" arraysize="*" value="Palomar/ZTF.g"/>
       <PARAM name="zeroPointFlux" ucd="phot.mag;arith.zp" 
              utype="photDM:PhotCal.zeroPoint.flux.value" 
              datatype="float" unit="Jy" value="3963.97"/>
       <PARAM name="magnitudeSystem" ucd="meta.code" 
              utype="photDM:PhotCal.magnitudeSystem.type" 
              datatype="char" arraysize="*" value="Vega"/>
       <PARAM name="effectiveWavelength" ucd="em.wl.effective" 
              utype="photDM:PhotometryFilter.spectralLocation.value" 
              datatype="float" unit="Angstrom" value="4722.74"/>
</GROUP>