[Playlist] Questions on spec about meaning of identifier and link

[Ross Mohn]

Two questions:

1. Why does the spec indicate that a track identifier "MUST be a legal
URI"? I would think of this element as specifying a CD id code or
something of that sort, not a URI. Doesn't the phrase "MUST be a legal
URI" conflict with the phrase "location-independent name"?

2. When a link points to an html webpage where someone can learn more
about a specific track, what should the "rel" attribute point to? I was
thinking maybe rel="http://www.w3.org/TR/1998/REC-html40-19980424/"
since the page is described as an HTML 4.0 Transitional document. Do you
have any more guidance on this point?

Thanks! -Ross