Abstract: Research on the relationship of data resource has become a research focus in data space area. Current data relationship researches mainly concentrate on the self attributes of data， however， the effect caused by users is neglected. As a consequence， user attention could hardly be expressed during the management， organization and application of data. User behavior based data relationship acquisition method was proposed to decide whether the user behavior is intentional by R/S analyzing of user history behavior. The user behavior sequence was excavated based on this to get user behavior pattern，and finally data relationship of data contained by the pattern in form of iTrail was built. The experiments proved that the method had a good effect.

Key words: dataspace, relationship of data, user behavior, R/S analysis, Hurst index