the analysis of the bibliographic relationships and vocabularies being represented in bibliographic families based on the frbr model

purpose: the purpose of this paper is to analyze and identify the different types of bibliographic relationships and vocabularies represented in persian literary families. this could help cataloguers and catalogue designers to do more meaningful information organization. methodology: research population included the bibliographic records of four literary families: shahnameh, masnavi, hafez's divan, and saadi's gulistan. content analysis was applied to identify and analyze the vocabularies representing bibliographic relationships in these families’ bibliographic records being stored in the opac of the national library of iran. based on the systematic sampling method, 351 records for shahnameh, 346 records for hafez's divan, 320 records for masnavi, and 305 records for saadi's gulistan were selected. findings: 63.41% of the records had at least one type of relationship from which most of them were derivative. the most frequent type of the relationships were abridgement”, revision, based on specific expression, ommentary”, and adaptation. also, the pattern and the frequency of the relationships in all families were different. most of the relationships were seen with different types of vocabularies. in order to better display the information in library opacs, the categorized file of vocabularies representing the bibliographic relationships in opacs can be developed and implemented. also, the paper introduces the most frequent vocabularies as a means for automatically managing the records related to the bibliographic families and enhancing the vocabulary control in rda and uniform titles.