About: http://webisa.webdatacommons.org/401390900

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	I haven???t yet tested the limit of how many custom variables you can have, but keep in mind that Google Analytics has a limit of 2048 characters for the entire tracking request so there is a limit.
http://www.w3.org/ns/prov#wasQuotedFrom	analyticsimpact.com