About: http://webisa.webdatacommons.org/409652010

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The nulll bitmap is always present in data records, regardless of whether the columns are nullable or not ??? unless the table is comprised solely of sparse columns.
http://www.w3.org/ns/prov#wasQuotedFrom	sqlauthority.com