About: http://webisa.webdatacommons.org/219196057

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	This section describes systems, including apparatus and methods, for using optical filters, including a filter holder that allows optical filters to be simply, conveniently, and/or flexibly interchanged.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com