astro:point_source id="IRAS1234+00" instr:imagedBy instr:IRAS; misc:name "IRAS1234+00"; phys:hasMeasurement astro:pt_flux3; owl:sameAs id="Spitzer1234+00". and astro:extended_source id="Spitzer1234+00" instr:imagedBy instr:Spitzer_IRAC" misc:name "IRAS1234+00"; phys:hasMeasurement astro:extended_flux6; owl:sameAs id="IRAS1234+00". I think I got it right now. Ed