David Becker William McMullen Kevin Hetherington-Young 50-64 2007 ICIQ http://mitiq.mit.edu/iciq/iqdownload.aspx?ICIQYear=2007&File=A+FLEXIBLE+AND+GENERIC+DATA+QUALITY+METAMODEL.pdf conf/iq/2007 db/conf/iq/iq2007.html#BeckerMH07