Abstract
Along with the explosive growth of the information in Social Network Service, the research of the quality of data has become a new hot point in related research field. High quality social data can more effectively support data mining, knowledge discovery, and can provide reliable and efficient data for users. Based on the measure problems of data quality, this paper discussed the measurement of two important dimensions of data quality: currency and trustworthiness. Computing models for currency measurement of data with or without time stamp are given. And based on the currency values, a trustworthiness measurement method is also given.
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