This pipeline is used to declare SQL tables which will not be included in the SPIP back ups.
It is called from the lister_tables_noexport
function in the ecrire/base/dump.php file. It accepts a parameter and returns as output an array containing the list of database tables not to be backed up:
$EXPORT_tables_noexport = pipeline('lister_tables_noexport', $EXPORT_tables_noexport);
By default, certain SPIP tables are already excluded, these being the tables used for statistics, searches and revisions.