  The CDMS was founded 1998 to provide in its catalog section line lists of
molecular species which may be observed in various astronomical sources using
radio astronomy. The line lists contain transition frequencies with qualified
accuracies, intensities, quantum numbers, as well as further auxilary
information. They have been generated from critically evaluated experimental
line lists, mostly from laboratory experiments, employing established
Hamiltonian models. Seperate entries exist for different isotopic species and
usually also for different vibrational states. As of December 2015, the number
of entries is 792. They are available online as ascii tables with additional
files documenting information on the entries. The Virtual Atomic and Molecular
Data Centre was founded more than 5 years ago as a common platform for atomic
and molecular data. This platform facilitates exchange not only between
spectroscopic databases related to astrophysics or astrochemistry, but also
with collisional and kinetic databases. A dedicated infrastructure was
developed to provide a common data format in the various databases enabling
queries to a large variety of databases on atomic and molecular data at once.
For CDMS, the incorporation in VAMDC was combined with several modifications on
the generation of CDMS catalog entries. Here we introduce related changes to
the data structure and the data content in the CDMS. The new data scheme allows
us to incorporate all previous data entries but in addition allows us also to
include entries based on new theoretical descriptions. Moreover, the CDMS
entries have been transferred into a mySQL database format. These developments
within the VAMDC framework have been driven by the needs of the astronomical
community to be able to deal efficiently with large data sets obtained with the
Herschel Space Telescope or, more recently, with the Atacama Large Millimeter
Array.
