recommendedArtifactDisplayBase

[James Kupsch <kupsch@cs.wisc.edu>]

Sorry for the late small proposal, but I've been thinking about a 
generic SARIF viewer and how to display paths to a human.  In a viewer 
it is nice to normalize the display for paths to be relative to a single 
location, or to be absolute for location not contained within the single 
location.

Without the viewer and the producer agreeing out of band on a uri, or a 
baseUriId name to use, the viewer does not know how to base the results 
for result display.

I propose adding a property name something like 
recommendedArtifactDisplayBase to the run object with a value of type 
artifactLocation.  Producers MAY set this to an appropriate value if 
possible.  If set, consumers that display relative paths, SHOULD display 
paths to relative to the recommendedArtifactDisplayBase if the path is 
contained in the recommendedArtifactDisplayBase.  If it is not contained 
in recommendedArtifactDisplayBase, viewer may display it as an absolute 
path (or by some other appropriate mechanism).

Jim