A bit detailed for a forum discussion but ideally could the database fields be read from the fits header? That way the need to enter all the info for each spectrum, with possible transcribing errors could be avoided and any search could then be done based on header information (eg with this you could potentially search for say “all spectra of a particular object covering H alpha at a resolution > 5000 and an SNR > 100” )
re the display of spectra, I wonder if any of the code used this VdS spectroscopy group database might be useful. I have contacts there if interested
http://spektroskopie.fg-vds.de/index_e.htm
(follow the link on the side to “database”)
Robin