IVOA Recommendation: Spectrum Data Model 1.1
  We present a data model describing the structure of spectrophotometric datasets with spectral and temporal coordinates and associated metadata. This data model may be used to represent spectra, time series data, segments of SED (Spectral Energy Distributions) and other spectral or temporal associations. 
Jonathan McDowell, Doug Tody, Tamas Budavari, Markus Dolensky, Inga   Kamp, Kelly McCusker, Pavlos Protopapas, Arnold Rots, ...
astro-ph.IM