===
vap+dat:http://autoplot.org/data/foo.txt?
                    ^
vap+dat:http://autoplot.org/data/foo.txt?
                    ^
vap+dat
===

vapScheme: vap+dat
scheme: http
resourceUri: http://autoplot.org/data/foo.txt
path: http://autoplot.org/data/
file: http://autoplot.org/data/foo.txt
ext: .txt
params: 
filters: null
surl: http://autoplot.org/data/foo.txt?
caretPos: 12
formatCarotPos: 20