Efa uses so-called "keys" to find records uniquely. find. Two keys play a special role:

UUID = Universally Unique Identifier for many objects, like boats or such as boats or people, in efa. These objects sometimes have have several versions with delimited periods of validity, in which case the the validity period must also be specified in addition to the object ID. validity period must also be specified. In its normal form, a UUID looks like this: '550e8400-e29b-11d4-a716-446655440000', They are randomly generated as a 128-bit number and are therefore unique worldwide. unique. 4 bits are encoded per row, the '-'s are of no meaning.
ecrid = efacloud record ID. This key uniquely references uniquely references a record, for example, a personal record in a specific validity period or a trip in a specific logbook. specific logbook. The key is also randomly generated as a 72-bit number, so that global uniqueness can also be assumed for the ecrid key. uniqueness can be assumed for the ecrid key. An example is '5wVSJezbhzro'. 6 bits are encoded per character.