|•||The country prefix is not part of a QSO; all prefixes are determined when log file is read; this approach leads to a consistent treatment of prefixes for all log files and QSOs within the same log file.|
|•||Prefixes are date sensitive and one prefix can cover multiple date ranges for which the prefix is used.|
|•||Users can edit the country database to add countries, change prefixes, dates, etc.|
|•||The prefix and the zone for a call can be overwritten when editing a QSO, and is like all prefixes, date sensitive. The new prefix and zone is added to the country database automatically and will be used for all subsequent contacts with that station.|
The country database contains a number of data tables. All these tables have their own customized editor. There is an editor for IOTA tables, QSL managers and station addresses. Below we show the data for countries.
All the important fields for a country. Note the Start end End date for the country.
Mappings are used to determine the country and zone for a callsign. With so many changes in the list of countries, DX4WIN determines the country for a callsign using date ranges. The table above shows this information. Also note that 9A was used for country T7 up to the end of 1983. This line is shown in a different color to make you aware that the same prefix was used for a different country.