It’s a tiny thing, but where the abstract says “replacing the
definition in RFC 1738,” one may be led to think (I was) that 1738 has
a more robust definition than it does. D’you mind changing that to
something like this: ‘This document provides a full specification of
the "file" Uniform Resource Identifier (URI) scheme, replacing the
very brief definition in Section 3.10 of RFC 1738.’
s/full/more complete/
A “full” specification of file: URIs might include a set of platform and file-system specific implementation advice about how to handle file naming, variations in Unicode normalization, case sensitivity, and so forth.