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Review of XML Serialization (first part)

From: Rinke Hoekstra <hoekstra@uva.nl>
Date: Mon, 6 Apr 2009 15:44:03 +0200
Message-Id: <1AF2E88D-69D3-44E3-94DB-7A994226F223@uva.nl>
To: OWL 2 <public-owl-wg@w3.org>

Here's my review of the XML Serialization. I only had a cursory look  
at the XML schema itself, but I will have another more thorough look  
once the abbreviation mechanism is in place.

Some of my comments are wordsmithing, but as this part of our  
specification is a bit controversial, I think we should tread very  

* Some parts of the texts read as a report on how the XML schema was  
constructed. I don't think that's the right tone for this document,  
and I suggest a more matter-of-fact description of the schema itself.
* The document is titled "XML Serialization", but the text  
consistently uses "XML Syntax". I suggest to use the former  
throughout, as it is less contentious.
* Document links called [OWL 2 Specification] point to the structural  
specification (in line with what the Profiles and Direct Semantics  
documents do). The Document Overview calls these links [OWL 2  
Structural Specification]... maybe consistent use of these should be  
checked across all documents.

Section 1 (Overview)

* The section could use a bit more structure, e.g. by adding small  
headings for paragraphs on mapping to UML classes, namespace, parsing  
and profiles.

1st paragraph,
* "RDF/XML remains the primary", consider rephrasing to "RDF/XML is  
the primary" (current wording suggests that XML is somehow newer, and  
we all know newer is better...)
* the 'this' in "use of this syntax by OWL 2 tools is optional" is a  
bit ambiguous.
* 'link' to [XQuery] is not a link

3rd paragraph
* `links' to [OWL 2 Specification] and [XML Schema] are not links
* "The XML schema has been obtained by a straightforward  
translation... " consider rephrasing to "The XML schema is a  
straightforward translation..."
* I had to look up the term 'eponymous' (as I had no clue as to what  
it means), and it seems that it is more appropriately used to refer to  
person names, rather than UML classes.

4th paragraph
* What 'useful parents' are is not immediately obvious. (don't think  
this needs a change in the doc...)

5th paragraph (starting with 'Additionally ..')
* the "just didn't make sense" is a bit informal for a document.  
Consider rephrasing to ".... some groups are mere documentation, and  
are not included as types:"

7th paragraph
* "Tools parsing OWL 2 ontologies in this syntax need to additionally  
implement these global conditions", shouldn't/musn't there be a should  
or must in this sentence?

8th paragraph
* "Therefore the OWL 2 XML Syntax can be parsed more easily than by  
using the canonical parsing process..." s/Syntax/Serialization, but  
also "easily" is a bit too easy, consider a less informal word.

9th paragraph
* Text mentions "xsd:anyURI" but only refers to XML Schema part 1  
(structure) and not part 2 (datatypes), consider adding a link to http://www.w3.org/TR/xmlschema-2/

* What about the "owl:Prefix" element? It is defined by the schema,  
but referred to anywhere else in the document. This section should at  
least describe (or refer to) the way in which prefixed names are  
resolved to full iri's

Section 2 (Example Ontology)

* Is the reference to 'live-from-wiki.xsd" in the schema location  
intentional? I assume the schema will change to a more permanent  
location in the future. Perhaps we should use that location instead of  
the live one?
* Very (very) minor remark: class names usually start with an  
uppercase character.

Section 3 (Example Ontology)

Review is done *before* IRI abbreviation was introduced, but *after*  
the Prefix element was defined.

* The schema does not define the owl:priorVersion,  
owl:backwardCompatibleWith and owl:incompatibleWith ontology  
properties which are part of the OWL 2 Specification


Drs Rinke Hoekstra

Leibniz Center for Law      |  AI Department
Faculty of Law              |  Faculty of Sciences
Universiteit van Amsterdam  |  Vrije Universiteit
Kloveniersburgwal 48        |  De Boelelaan 1081a
1012 CX  Amsterdam          |  1081 HV Amsterdam
+31-(0)20-5253499           |  +31-(0)20-5987752
hoekstra@uva.nl             |  hoekstra@few.vu.nl

Homepage: http://www.leibnizcenter.org/users/rinke
Received on Monday, 6 April 2009 13:56:43 UTC

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