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Knjižnica 53(2009)1-2, 77–97 78 Original scientific article UDC 050:6 UDC 001.814:006 Abstract We investigated the structure of abstracts in Slovenian and international journals in the field of materials and technology. The aim of the study was to analyze the adher- ence of the abstracts published in Materials and Technology (MIT) and Materials Sci- ence and Technology (MST) to two different instructions for the preparation of ab- stracts (scheme based on ISO 214:1976 and Spanring system). 25 abstracts from each journal were divided into sentences. We tried to place the sentences into one of the categories of the above mentioned schemes. The research was a part of the postgrad- uate study in the Department of Library and Information Science and Book Studies (Faculty of Arts, Ljubljana) in September and October 2008. There are no important differences between MIT and MST. Spanring system seems more appropriate for the field of materials and technology. The place and the time of the research should be added to abstracts and the Hu-bit category should be distributed into two parts: Hu- M (method) and Hu-R (results). The recommended Spanring system should be har- monized with authors, who publish in these serials and the effect of the instructions should be analyzed, too. Keywords : serials, abstracts, standards, instructions, documentalistics, SIST ISO 214:1996, Materials and Technology, Materials Science and Technology 1 Uvod Mednarodni standard ISO 214:1976 in njegov slovenski ekvivalent SIST ISO 214:1996 definirata izvleček kot skrajšano, natančno predstavitev vsebine do- kumenta, brez dodane interpretacije in kritike ter brez razlik glede na to, kdo je izvleček napisal. Pri tem izrecno navajata, da se je izraz »synopsis« oz. sinopsis v starejši izdaji istega standarda uporabljal za tiste izvlečke, ki jih je napisal avtor sam, da pa se ta razlika v poimenovanju izvlečka opušča z letom izdaje sedaj veljavnega stan- darda, tj. z letom 1976. Standard razdeljuje izvlečke po njihovi informativnosti na informativne, indika- tivne in informativno-indikativne: - Informativni izvleček: predstavi naj, kot je to le mogoče, kvantitativne in/ali kvalitativne informacije, ki so vsebovane v dokumentu. Informativni izvlečki so še posebej želeni za tekste, ki opisujejo eksperimentalna dela in dokumente, ki obravnavajo eno samo temo.