All proper names are capitalised in standard written language, but capitalization is voluntary in user names. The article also covers the capitalization of user names. For example, the identifying part in the name someone44914 is someone and the supplementary part is 44914.
Therefore, there is also a supplementary part in many names which sets the name apart from other user names with the same identifying part. A user name must be unique in the community it is registered to. The identifying part is the foundation of user name, usually its lingual part. In the article, it is suggested that user names can be divided into two functionally different parts. The main research subject is the structure of user names. The research data consists of 279 user names collected from Playforia, a Finnish online gaming community. The term user name is used when referring to these names. The article examines registered personal names in online communities.
