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Re: review of rdf:text, dated 2008-11-04

From: Sandro Hawke <sandro@w3.org>
Date: Thu, 06 Nov 2008 12:22:33 -0500
To: Jos de Bruijn <debruijn@inf.unibz.it>
cc: RIF WG <public-rif-wg@w3.org>
Message-ID: <17638.1225992153@ubuhebe>


> I reviewed the current draft of the rdf:text specification [1].

Excellent, thank you.

Can you please send this to public-rdf-text@w3.org instead of or in
addition to public-rif-wg, so the interested OWL participants can join
the discussion?

A reminder: people should subscribe to that list if they are interested
in this document.  See
     http://lists.w3.org/Archives/Public/public-rdf-text/
for archives and the "subscribe" link.
   
Note that yesterday, OWL-WG resolved to publish this as a FPWD as soon
as RIF-WG approves, so we'll have to figure out which changes to make
before/after publication.

       -- Sandro

> I subdivided my comments into criticism on the content, criticism on the
> structure, errors in the document, and editorial issues.
> 
> Criticism on the content
> ====
> - to assure maximum compatibility with current and future versions of
> XML schema datatypes, the string parts of both the lexical and value
> space should be based on the respective spaces of the XML schema
> datatype string.
> - the set of characters is finite, and thus it cannot be assumed that it
> is infinite. The problem that some OWL 2 implementations might have some
> issue with the finiteness of this set is of no concern to this datatype
> per se. In fact, the XML schema string datatype is based on a finite set
> of characters, and so OWL 2 implementations will run into problems with
> this datatype.
> If there is really a problem to be expected with implementations of OWL
> 2, it should be dealt with in the OWL 2 specification, and not the
> specification of this datatype.
> - concerning the definition of fn:text-length: It is not obvious that
> this function should return the length of only the string part of the
> text. A user might expect the language tag, and perhaps even the
> separator used in the lexical space, to be taken into account when
> computing the length.
> Therefore, I believe no text-length function should be provided.
> 
> Criticism on the structure
> ====
> - the sections 3.1 and 3.2 are not logically part of the definition of
> the data type, and so should not be included in section 3.
> 
> Errors in the document
> ====
> - In the example in section 3.2 it is claimed that the string "Padre de
> familia" is mapped to the same value as the text "Padre de familia@".
> This is clearly not true.
> - In the definition of text-from-string-lang, $arg2 must be a string as
> specified in BCP 47, and otherwise an error must be raised.
> 
> Editorial issues
> ====
> - abstract: "both in" => "in both"
> - introduction: the text about how this document came to be and about
> the collaboration between the working groups might be interesting for
> the "purpose of this document" section, but not for the specification
> document itself. However, I guess that for the first public working
> draft it's not really an issue.
> - the references of the form [1],... are awkward. Please use the same
> style for all references.
> - some of the references are italicized, and some are not, e.g., the
> second sentence of section 2.
> - sections 4.1.3 and 4.1.4: please specify the return values; extraction
> is a process.
> - the text and summaries in sections 4.2.1 and 4.2.2 is not entirely
> clear. Please use symbols for referring to the individual parts of the
> arguments and to state properties about them, like in sections 4.1.3 and
> 4.1.4.
> - there is a question-mark in the signature declaration in section
> 4.3.2. It is not clear what this means.
> 
> 
> [1] http://www.w3.org/2007/OWL/draft/ED-owl2-rdf-text-20081104/
> 
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> --------------ms080304090806080809060301--
Received on Thursday, 6 November 2008 17:22:44 GMT

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