In the wiki page http://wiki.koha-community.org/wiki/DB_schema_bugs, an insconsistency has been noticed: primary keys column name can be: id (in authorised_values table), xxxid (cityid), xxx_id (label_id), xxxId (limitId), xxxcode (branchcode), xxxnumber (borrowernumber) => choose how to name PK and update schema accordingly The bug 7065 add a foreign key to the reserves table, so I think it's time to clearly choose how we name primary keys. The possible options are below, my opinion: 1- id alone => will result in complexity & mistakes, this option must be discarded 2- xxxxid => short option, may result in hard readability. 3- xxxxId => we haven't decided if we want UC in field names. I won't discard this option, but does not favour it. 4- xxx_id => _ still undecided in field names, I'm not sure it's much better than the xxxid one 5- xxxxnumber => number is quite long, and may result in very long field names, which is not good. I does not like this option. Let's start the discussion -- Paul POULAIN http://www.biblibre.com Expert en Logiciels Libres pour l'info-doc Tel : (33) 4 91 81 35 08