New Development of Automatic Metadata Extraction
元数据自动抽取研究新进展*

This paper analyses realistic demands of automatic metadata extraction,elaborates related research on automatic metadata extraction and compares three typical automatic extractors of metadata,including DROID,NLNZ Metadata Extractor and Metadata Miner Catalogue PRO.On the basis of discussing present limitations of automatic metadata extraction,the authors give a summary and prediction of this technology.