Re: property/class ambiguity in languages with no letter case

Hi,

I think that in most cases foo -> Foo (i.e. property foo having rdfs:range
instances of class Foo) can be read as 'has Foo'. However, as Dan pointed
out, there are some cases, for which this doesn't hold. It's not a
convention everyone follows.

I wanted to have a broader look at this pattern, in which properties use
lower-cased local name of classes in their range. So I queried LOV SPARQL
endpoint (http://lov.okfn.org/endpoint/lov), downloaded vocabularies it
lists (those that resolved), and queried the merged dataset to see what
properties and classes following the mentioned naming pattern are there.

This sample contains 251 such property-class pairs and it's available at
http://databin.pudo.org/t/289185. The (hidden) third column contains "yes"
if the triple property rdfs:range class is present.

I hope this sample can serve as an approximate illustration of this
widespread naming pattern in practice.

Best,

Jindřich

-- 
http://mynarz.net/#jindrich


On Tue, Feb 11, 2014 at 2:18 PM, Dan Brickley <danbri@google.com> wrote:

>
> On 11 Feb 2014 03:03, "Phil Archer" <phila@w3.org> wrote:
> >
> > On this occasion I really am trying to avoid getting into the debate
> about whether it is right or not to use an object property with a label
> that is the same as the class that is its range, differentiated only by the
> case of the first letter. That is an issue, and we prob should clear it up,
> but not today (and I suspect there is a lot of agreement on this).
> >
> > I'm just asking, do you agree or not that foo -> Foo *implies* 'has foo'
> -> Foo sufficiently strongly that a translation of the label into a
> language that does not have upper and lower case letters can indeed be 'has
> foo?'
>
> Good point re labels.
>
> Some examples where this doesn't work well:
>
> subClassOf -> hasSubClassOf
> alumniOf -> hasAlumniOf
>
> The 1st points to a broader type; the 2nd to an Educational org that
> someone is an alumni of.
>
> In both cases, prepending 'has' makes less sense and encourages the
> property to be misread backwards (until you read the last syllable and get
> confused).
>
> In general 'xyzOf' seems to me a 'last resort' when looking for property
> names. I wish we'd called rdfs:subClassOf "superClass" instead. But as you
> say that's another discussion.
>
> Some more potential examples -
> https://dvcs.w3.org/hg/webschema/file/861b6fd28fcb/schema.org/translations/zhcn/schema_org_zhcn.html
>
> This is a first cut at schema.org labels in Chinese, thanks to Baidu,
> where lang of zh-cn is "Mainland China, simplified characters", and as I
> understand it, caseless.
>
> First, a class, 'Event':
>
>      <div typeof="rdfs:Class" resource="http://schema.org/Event">
>
>     <https://dvcs.w3.org/hg/webschema/file/861b6fd28fcb/schema.org/translations/zhcn/schema_org_zhcn.html#l675>       <span class="h" property="rdfs:label">Event</span>
>
>     <https://dvcs.w3.org/hg/webschema/file/861b6fd28fcb/schema.org/translations/zhcn/schema_org_zhcn.html#l676>       <span class="h" property="rdfs:label" xml:lang="zh-cn">事件</span>
>
>     <https://dvcs.w3.org/hg/webschema/file/861b6fd28fcb/schema.org/translations/zhcn/schema_org_zhcn.html#l677>       <span property="rdfs:comment">An event happening at a certain time at a certain location.</span>
>
>     <https://dvcs.w3.org/hg/webschema/file/861b6fd28fcb/schema.org/translations/zhcn/schema_org_zhcn.html#l678>       <span property="rdfs:comment" xml:lang="zh-cn">在某时某地发生的一件事</span>
>
>     <https://dvcs.w3.org/hg/webschema/file/861b6fd28fcb/schema.org/translations/zhcn/schema_org_zhcn.html#l679>        <span>Subclass of: <a property="rdfs:subClassOf" href="http://schema.org/Thing">Thing</a></span>
>
>     <https://dvcs.w3.org/hg/webschema/file/861b6fd28fcb/schema.org/translations/zhcn/schema_org_zhcn.html#l680>     </div>
>
> and a property, 'event', which seems to have an identical zh-cn label:
>
>   <https://dvcs.w3.org/hg/webschema/file/861b6fd28fcb/schema.org/translations/zhcn/schema_org_zhcn.html#l6142>     <div typeof="rdf:Property" resource="http://schema.org/event">
>
>   <https://dvcs.w3.org/hg/webschema/file/861b6fd28fcb/schema.org/translations/zhcn/schema_org_zhcn.html#l6143>       <span class="h" property="rdfs:label">event</span>
>
>   <https://dvcs.w3.org/hg/webschema/file/861b6fd28fcb/schema.org/translations/zhcn/schema_org_zhcn.html#l6144>       <span class="h" property="rdfs:label" xml:lang="zh-cn">事件</span>
>
>   <https://dvcs.w3.org/hg/webschema/file/861b6fd28fcb/schema.org/translations/zhcn/schema_org_zhcn.html#l6145>       <span property="rdfs:comment">Upcoming or past event associated with this place or organization.</span>
>
>   <https://dvcs.w3.org/hg/webschema/file/861b6fd28fcb/schema.org/translations/zhcn/schema_org_zhcn.html#l6146>       <span property="rdfs:comment" xml:lang="zh-cn">即将发生的或已经发生的跟该地点或组织有关的事件</span>
>
>   <https://dvcs.w3.org/hg/webschema/file/861b6fd28fcb/schema.org/translations/zhcn/schema_org_zhcn.html#l6147>       <span>Domain: <a property="http://schema.org/domain" href="http://schema.org/Organization">Organization</a></span>
>
>   <https://dvcs.w3.org/hg/webschema/file/861b6fd28fcb/schema.org/translations/zhcn/schema_org_zhcn.html#l6148>       <span>Domain: <a property="http://schema.org/domain" href="http://schema.org/Place">Place</a></span>
>
>   <https://dvcs.w3.org/hg/webschema/file/861b6fd28fcb/schema.org/translations/zhcn/schema_org_zhcn.html#l6149>       <span>Range: <a property="http://schema.org/range" href="http://schema.org/Event">Event</a></span>
>
>   <https://dvcs.w3.org/hg/webschema/file/861b6fd28fcb/schema.org/translations/zhcn/schema_org_zhcn.html#l6150>     </div>
>
> Not sure these chars and markup will make it through email fully to
> everyone, but see webschemas mercurial repo at
> https://dvcs.w3.org/hg/webschema/file/861b6fd28fcb/schema.org/translations/zhcn/schema_org_zhcn.htmlfor more examples.
>
>
> Dan
>
> > Phil.
> >
> >
> > On 11/02/2014 10:46, Jindřich Mynarz wrote:
> >>
> >> OK, I thought I must have misunderstood that. (However, you can argue
> that
> >> you can provide owl:equivalentProperty links between the translated
> URIs.)
> >>
> >> If translating rdfs:labels is indeed the case, then why not have 2
> >> vocabulary terms with the same label? Is it because it confuses
> vocabulary
> >> users and worsens usability of the vocabulary in question? What other
> >> concerns do you have on mind?
> >>
> >> - Jindřich
> >>
> >
> > --
> >
> >
> > Phil Archer
> > W3C Data Activity Lead
> > http://www.w3.org/2013/data/
> >
> > http://philarcher.org
> > +44 (0)7887 767755
> > @philarcher1
> >
>