Hi 

I���m a bit confused. When I use isAbsolute I get 

'file:///toto.png' asUrl isAbsolute 
>>> false


'file://toto.png' asUrl isAbsolute 
>>> true


Now I confused because as Unix / is absolute so file://toto.png would be relative.
and /foo is absolute. 

Are URLs so different than files?
Are the results I get correct?

I ask this question in the context of Microdown if people write 

![caption](file://toto.png).
![caption](figures/toto.png)
![caption](file:///toto.png).

S