An Extended Relational Data Model for Database Uncertainty Using Data Source Reliability

데이터 제공원의 신뢰도를 고려한 확장 관계형 데이터 모델

We propose an extended relational data model which can represent the reliability of data. In this paper, the reliability of data is defined as the reliability of the source, from which the data originated. We represent the reliability of data at the level of attribute values, instead of tuples, then define the selection, product and join operators.