Each reference and note in a database carries two unique identifiers:
A numeric identifier which is generated by RefDB automatically when adding a dataset. There is no way to alter the ID. An example of an ID is"513".
An alphanumeric identifier which is generated by RefDB when adding a dataset unless the dataset specifies a citation key. If RefDB has to generate the citation key for a reference, it will use the last name of the first author and the publication year, followed by a character sequence to make the result database-unique if required. The result is something like "Miller1999b". Citation keys for extended notes are generated in a similar fashion from the note author's name and the timestamp.