Survey on research paper's relations

This paper discusses research studies related to formation of relations among research papers. From the analysis that has been conducted to some references, it can be concluded that there are two types of research paper's relation i.e. a direct relation and indirect relation. The direct relation has the good potential to be further developed than indirect relation. There are three approaches in this relation type i.e. content-based approach, citation analysis approach and citation context approach. The content-based approach cannot accommodate the special characteristics of research papers like citation and author. This approach only suitable implemented in regular documents and only able to identify similarity relations. Specific characteristics such as the citation and the authors can be handled by using citation analysis approach. Focus of the citation analysis approached is increasing the accuracy of the paper relation, where the results obtained so far is good. This approach can identify more diverse relations types such as relations based on citation or author. However, this approach failed to identify relationships between paper based on the meaning contained in text. The relations based on the meaning contained in a text can only be conducted by using citation context approach. Research related to the classification of citation sentences has the big potential to construct the relation based on meaning contained in a text. The construction process of the relation network based on citation context is also proposed in this paper. This process is important in the utilization of the relations in various fields of research. Finally, we also present research opportunity and state of the art research in three main areas, i.e. the recommender system, retrieval system and research map visualization.