The aim of this paper is to compare subject headings by the authors of the work and those administrated by professional indexers. The empirical setting for the study lies within the sociological discipline. The questions asked are: What overall similarities and differences between subject headings administrated by authors versus indexers can we find? What qualitative advantages and disadvantages can we establish between subject headings generated by natural language versus controlled vocabularies?Subject headings in the Swedish national library catalogue Libris and in five Swedish universities platforms for academic publishing are studied and compared. Today it is praxis at Swedish universities that administration of subject headings is done by authors and not by professional indexers. We consider this to be a clash between professions. The paper is based on Birger Hjørlands domain analysis. We discuss the practice of subject heading administration within these two professions. Furthermore we wish to determine advantages and disadvantages with subject headings indexed by natural language versus controlled vocabularies. / Program: Bibliotekarie