Family name distributions collected in the "Aktion Forscherkontakte" (FOKO)

This are pseudonymous data of "Aktion Forscherkontakte" (FOKO) of the Deutschen Arbeitsgemeinschaft Genealogischer Verbände (DAGV, = German association of genealogical associations), which was operated by the Verein für Computergenealogie (=association for computer genealogy). For over 25 years the DAGV has collected information on geographical and temporal distribution of family names. Amateur genealogists have been invited to submit the names of researched family in aggregated form. In this way, nearly 1.28 million evidence of names were collected. A record includes the following information: family name year of first evidence year of last evidence - Occasionally you will find the value 9999 for 'today' which can be interpreted at least as 1990. submitter (pseudonymous) denomination country territory postal code or "w-Nummer" (replacement zip in German registry offices) place name place identificator For denomination, country and territory specific abbreviations are used, which can be looked up in the CSV files. Some of the identifiers for country and territory are a bit idiosyncratic from project-historical reasons.本数据集为德国家谱协会联合会（Deutschen Arbeitsgemeinschaft Genealogischer Verbände，简称DAGV）推出的“研究者联系行动（Aktion Forscherkontakte，简称FOKO）”假名化数据，由计算机家谱协会（Verein für Computergenealogie，即Association for Computer Genealogy）负责运营。25余年来，DAGV持续收集姓氏的地理与时间分布信息，邀请业余家谱研究者以聚合形式提交其所研究的家族姓氏相关数据。通过该采集模式，累计收集到近128万条姓名相关记录。单条记录包含以下信息：姓氏、首次出现年份、末次出现年份——偶尔会出现代表“至今”的数值9999，该值至少可被视作1990年；提交者（假名化）、教派、国家、地域、邮政编码或"w-Nummer"（德国登记处使用的替代邮编、地名以及地点标识符。针对教派、国家和地域，均使用了特定缩写，相关缩写可在CSV文件中查询。受项目历史因素影响，部分国家和地域的标识符略显特殊。