Reviews for paper Why Off-The-Shelf RDBMSs are Better at XPath Than You Might Expect, submitted to SIGMOD 2007.
Overall rating: accept
Yes
Slightly novel
Good
A lot; important for the community to know about
Good
Accept
High
Good and interesting investigation on how to evaluate XPath expressions using relational operators.
none
Yes
Slightly novel
Acceptable
Some; community would benefit from reading
Good
Neutral
Medium
While I'm not an expert in the generic-XML-in-RDBMS storage literature, I liked this paper. It did a nice job of showing how off-the-shelf RDBMS technology can process various classes of XML queries well. More query classes would've been nice, though.
I'm torn on whether or not this paper was mis-submitted, and really belongs over in the research track. Just because you used a commercial RDBMS doesn't mean you're not doing research, and you aren't from industry and aren't describing a commercial product.
Figure 12 is interesting and a little scary/depressing - sad that DB2's XML features aren't yet good enough for the system to beat its relational self at handling XML!
I would have liked to see more query classes considered - such as queries that might be of the sort you'd claim DB2's XML features were designed for.