Atomic and molecular physics
Numerical and bibliographic Databases in Atomic and Molecular Physics are essential for both the modelling of various astrophysical media and the interpretation of astrophysical spectra provided by ground or space-based telescopes.
The free exchange of atomic and molecular data requires the definition both of standards which model the data structure and of tools that implement these standards and that help to carry out science using these data. Currently there is a collaborative project of standardisation of linelists within the IVOA consortium as well as a wider collaborative project of standardisation concerning many more processes of atomic and molecular data. Paris Observatory is a major partner in development of both standards and tools.