Negin Shokrzadeh Hashtroudi, Mohsen Haji Zeinolabedini Feasibility of implementing PRESSoo model in organizing Persian serials Abstract Purpose: The purpose of this study was to identify the degree of compatibility of Persian serials with the PRESSoo model. Methods: This paper describes a survey study conducted on a population consisting of 90 Library and Information Science (LIS) serials from the National Library of Iran. Firstly, a mapping table was produced consisting of ISSN data elements and PRESSoo classes, as published in the last PRESSoo report. Secondly, this mapping table was adapted to fit UNIMARC fields, and used to determine to what extent Persian LIS serials are compatible with the PRESSoo model. In order to be sure about the accuracy of the checklist, reference was made to ISSN manual 2015 in some cases. Results: results of this study showed that bibliographic records for Persian LIS serials are compatible with 5 classes and 18 properties of PRESSoo. The reason for this low compatibility is due to library software problems, leading to inattention to some key UNIMARC fields. Some important classes are absent in the studied records. In order to have adequate catalogs, some important classes such as end of publication, storage units for cumulative works, supplementary works, and their properties should be added to Persian serial catalogs. Value: PRESSoo is a new conceptual model for describing important elements of serials and continuing resources. In 2017, this model was designated as an IFLA standard. However, this model has not been used in Iran. This study has analysed the feasibility of implementing the PRESSoo model for organizing Persian serials. Background In order to overcome the problems of library catalogs, IFLA and other international organizations developed new models. One of the most important of these models is FRBR, which was created in 1998. FRBR obeys entity-relationship formalism. Oliver (2017) notes that the "decision to use entity-relationship modelling was also an important step in changing the library’s perspective of bibliographic information, from strings of information embedded in paragraphs to data that can be handled efficiently in digital environments. Entity relationship modelling has to be understood outside the traditional library record structure. Entities not held together by being in the same “record”. Libraries working in a MARC environment are accustomed to pieces of information being held together within the shell of a bibliographic or authority record. There is no record in the entity- relationship model. The entities are held together in a meaningful way solely through the relationships".