AnHai Doan Jeffrey F. Naughton Akanksha Baid Xiaoyong Chai Fei Chen 0002 Ting Chen Eric Chu Pedro DeRose Byron J. Gao Chaitanya Gokhale Jiansheng Huang Warren Shen Ba-Quy Vuong The Case for a Structured Approach to Managing Unstructured Data http://arxiv.org/abs/0909.1783 2009 CoRR abs/0909.1783 db/journals/corr/corr0909.html#abs-0909-1783 informal publication