@article{Martens:2006:ECX:1166074.1166076,
    Address = {New York, NY, USA},
    Author = {Martens, Wim and Neven, Frank and Schwentick, Thomas and Bex, Geert Jan},
    File = {e6e37685b71dc411efea9961c75dc19b6f39 (0) - a - a - p.pdf},
    ISSN = {0362-5915},
    Journal = {ACM Trans. Database Syst.},
    Keywords = {XML, XML Schema, validation, unranked trees},
    Month = {September},
    Number = {3},
    Pages = {770--813},
    Publisher = {ACM},
    Title = {Expressiveness and Complexity of XML Schema},
    URL = {http://doi.acm.org/10.1145/1166074.1166076},
    Volume = {31},
    Year = {2006},
    acmid = {1166076},
    bdsk-url-1 = {http://doi.acm.org/10.1145/1166074.1166076},
    bdsk-url-2 = {http://dx.doi.org/10.1145/1166074.1166076},
    date-added = {2017-01-23 08:24:29 +0000},
    date-modified = {2017-01-23 08:24:54 +0000},
    issue_date = {September 2006},
    numpages = {44},
    doi = {10.1145/1166074.1166076}
}

@article{Martens:2006:ECX:1166074.1166076, Address = {New York, NY, USA}, Author = {Martens, Wim and Neven, Frank and Schwentick, Thomas and Bex, Geert Jan}, File = {e6e37685b71dc411efea9961c75dc19b6f39 (0) - a - a - p.pdf}, ISSN = {0362-5915}, Journal = {ACM Trans. Database Syst.}, Keywords = {XML, XML Schema, validation, unranked trees}, Month = {September}, Number = {3}, Pages = {770--813}, Publisher = {ACM}, Title = {Expressiveness and Complexity of XML Schema}, URL = {http://doi.acm.org/10.1145/1166074.1166076}, Volume = {31}, Year = {2006}, acmid = {1166076}, bdsk-url-1 = {http://doi.acm.org/10.1145/1166074.1166076}, bdsk-url-2 = {http://dx.doi.org/10.1145/1166074.1166076}, date-added = {2017-01-23 08:24:29 +0000}, date-modified = {2017-01-23 08:24:54 +0000}, issue_date = {September 2006}, numpages = {44}, doi = {10.1145/1166074.1166076} }