## Changes for end-users

To first order, using the new protocol to query the CDMS database should be transparent to the end user. This is one of the purpose of LINEDB. However, it seems that the database behind the new protocol is not same as before. The user should be aware that:

- as of today, the request takes more time and more bandwidth than before (48 minutes to download the database in the range 100-400 MHz, 893 MB in return),
- the species name/formula may be different between the old and new database (e.g. “Methanol” vs “CH3OH”, “CCH, v=0” vs “CCH”),
- the vibrational state has been removed from the formulas (see e.g. “CCH” above),
- querying a formula may return the same molecule under different formulas (e.g. you ask for “HCCCN” and LINEDB returns “HCCCN” and “HC3N”),
- some lines seem to have disappeared in the new database