W3C home > Mailing lists > Public > www-rdf-comments@w3.org > January to March 2001

RDF comments from the ages

From: Aaron Swartz <aswartz@upclink.com>
Date: Mon, 12 Mar 2001 22:19:42 -0600
To: RDF Comments <www-rdf-comments@w3.org>
Message-ID: <B6D2FBFD.24E63%aswartz@upclink.com>
Here's what I get from trawling through RDF-DEV and RDF Interest for all of
1999:

Spec treats email addresses as literals, not URIs
(probably should be added to errata)
http://www.mailbase.ac.uk/lists/rdf-dev/1999-03/0002.html

The first known instance of the set or bag question
http://www.mailbase.ac.uk/lists/rdf-dev/1999-04/0001.html
    DanBri cites the use of set terminology as evidence towards a set:
    http://www.mailbase.ac.uk/lists/rdf-dev/1999-04/0003.html
    EricP says that in a multi-user system, it should be a bag (sorta):
    http://www.mailbase.ac.uk/lists/rdf-dev/1999-04/0007.html
    Bleed-over from XML-L:
    http://listserv.heanet.ie/cgi-bin/wa?A2=ind9910&L=xml-l&D=0&P=13979
    http://www.mailbase.ac.uk/lists/rdf-dev/1999-10/0019.html

No parseType="Resource" examples in the spec
(another errata?)
http://www.mailbase.ac.uk/lists/rdf-dev/1999-06/0010.html

First known instance of Qname->URI problems:
http://www.mailbase.ac.uk/lists/rdf-dev/1999-07/0012.html
    conformance problem with xmlns I hadn't seen before:
    http://www.mailbase.ac.uk/lists/rdf-dev/1999-07/0013.html

How do you constrain members of a container in RDFS?
http://www.mailbase.ac.uk/lists/rdf-dev/1999-07/0015.html

Does a statement imply its reification?
(I don't think so, but others seem to agree that it does)
http://www.mailbase.ac.uk/lists/rdf-dev/1999-07/0028.html

Can properties have no value?
http://www.mailbase.ac.uk/lists/rdf-dev/1999-08/0001.html
    RRS says use a genid:
    http://www.mailbase.ac.uk/lists/rdf-dev/1999-09/0015.html
    Cowan says use empty literal:
    http://www.mailbase.ac.uk/lists/rdf-dev/1999-09/0016.html

First known aboutEachPrefix complaint
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Nov/0068.html

xml:lang not in the model
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Nov/0068.html

rdf:ID should create isDefinedBy triples
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Nov/0068.html

Do nodes exist? Even if they aren't attached to anything?
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Nov/0079.html
    Guha: Yes, nodes exist.
    http://lists.w3.org/Archives/Public/www-rdf-interest/1999Nov/0083.html

#rdfms-logical-formalism
Guha: RDF is a very proper subset of predicate logic.
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Nov/0083.html
    Melnik: I proved that the most general RDF model does not exist.
    http://lists.w3.org/Archives/Public/www-rdf-interest/1999Nov/0085.html
    Formal algebra in:
    http://www-diglib.stanford.edu/diglib/ginf/WD/rdf-alg/rdf-alg.ps

We need a standard way to talk about the source of triples:
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Nov/0089.html
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Nov/0097.html
http://www-db.Stanford.EDU/~stefan/updates.html

Is pointing to a fragment of a document the same as point to that literal?
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Nov/0073.html
    Renato: I wanted to distinguish between identifers and reference
    http://lists.w3.org/Archives/Public/www-rdf-interest/1999Nov/0091.html
    DanBri: It doesn't solve the issue, need more properties (rdfs:seeAlso)
    http://lists.w3.org/Archives/Public/www-rdf-interest/1999Nov/0093.html

What does a URI mean? / Linking to resources
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Nov/0106.html
http://www-db.Stanford.EDU/~stefan/updates.html
    Is URI of a description the same as URI of what is being described?
    http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0102.html
    http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0107.html
    Difference between URI as string, URI as derefed bits, URI as object
    http://lists.w3.org/Archives/Public/uri/2000Oct/0006.html

How do we distinguish between resource entity and resource content?
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0107.html
    One suggestion:
    <q cite="http://logicerror.com/semanticWeb-long">
    Common practice for giving something a URI is to create a web page that
    describes the object and explains that the URL of that webpage
    represents it. For example, I created a URI for my copy of Weaving the
    Web. Now I have said that that specific URI no longer represents the web
    page you get back when you visit it, but instead the physical book that
    it describes.</q>

With RDF services, how do we distinguish between service itself and the data
it returns?
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0107.html

What about URIs with more than one meaning? How do we deal with it?
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0107.html

What is mapping between URIs and resources? (DanBri)
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0025.html
    WebDAV defines redirect resources -- are we happy?
    http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0125.html

Is the U in URI for Uniform, Unique, or Universal?
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0146.html

Is there something special about "virtual resources" -- i.e. those described
by RDF and which don't return a description of themselves?
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0107.html

#rdfms-literals-as-resources:
Raised: Jonas Liljegren (jonas@paranormal.o.se)
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Nov/0107.html
    also mentions:
    - all dereferencable URIs should be treated as literals
    - mime types should be subclasses of rdfs:Literal
      (seeAlso #rdfms-literal-is-xml-structure)
    genids should be used for literals:
    http://lists.w3.org/Archives/Public/www-rdf-interest/1999Nov/0120.html

What's the skolem function?
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Nov/0092.html
http://www-db.Stanford.EDU/~stefan/updates.html
http://www-db.stanford.edu/~melnik/rdf/api.html#digest

Do anonymous resources have a URI?
    DanBri: URI is just one bit of info about a resource
    http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0025.html
    Two kinds of URIs (private and public):
    http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0028.html
    Melnik: Agreed-upon URIs for anonymous resources are essential
    http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0032.html
    DanBri: You can't do that -- you need more info:
    http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0033.html
    DanBri: anonymity is not a property of a resource, but of a mention:
    http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0035.html
    Melnik: Good summary of problem/solution:
    http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0037.html

Are triples independent of the model (graph?) that they're in?
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0041.html

How do you assert something, but give the resulting triples a URI?
(i.e. assert and reify at the same time)
http://logicerror.com/decentralizedRDF
http://lists.w3.org/Archives/Public/www-rdf-interest/2001Feb/0161.html
    This makes time difficult to represent in RDF
    http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0149.html
    http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0150.html
    Gabe: That's not true -- use rdf:ID
    http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0151.html
    Another Issue: Wait -- the EBNF doesn't allow this!
    http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0152.html

Does a rdf:Statement represent a stating or the abstract statement?
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0068.html

Can't define acceptable properties for a class:
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0094.html

Are properties inherited through subclassing?
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0096.html

Are properties of a class inherited by instances of a class?
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0097.html

RDF mapping into Borges
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0137.html
    Just kidding. ;-) Anyone still paying attention?

RDF model is property-centric, but syntax is resource-centric
http://lists.w3.org/Archives/Public/www-rdf-interest/1999Dec/0148.html

Issue for Brian: Can you make the issue IDs links to their URIs? Like:
    Issue <a 
    href="http:...#rdfms-uri-for-graph">rdfms-uri-for-graph</a>: blah blah
    blah...

Well, that's enough issue trawling for me. That should cover you all thew
way up to the beginning of 2000. Thanks for the blast from past -- it was
quite interesting to see how far RDF came in a year, and how quickly it's
been gaining steam. Yet, it's very odd to travel an entire year in one
sitting!

I hope these issues will be useful, and added to the list. Let me know if
you have questions with what I wrote.

-- 
Aaron Swartz <me@aaronsw.com>|       The Info Network
  <http://www.aaronsw.com>   |     <http://theinfo.org>
AIM: JediOfPi | ICQ: 33158237| the way you want the web to be
Received on Monday, 12 March 2001 23:19:07 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Friday, 21 September 2012 14:16:27 GMT