The actual process of synchronisation is illustrated in a simplified form in Figure . All entries are read one after the other, first from ELN A (Figure (1)), then from ELN B (Figure (3)). For each entry, a check is made for changes of the values configured by the mapping specifications (see Figure ) since the last synchronisation process (Figure (2 & 4)). If so, a corresponding data entry is made. As soon as all entries have been read, the process searches for the availability of complementary entries in the target ELN (Figure (5)). In case of missing entries, an attempt is made to create a new one if the corresponding settings allow it (Figure ). The new values are now transferred to the entries (Figure (6.A & 6.B)) found (or created) according to the mapping specifications (see Figure ). In this step, the transfer operator is used to adapt the data to the target system, the latest updated version of two pairing entries will overwrite all existing values in its partner in cases where the settings define that all or parts of the entries are to be synchronised.