- From: Aaron Bradley <aaranged@gmail.com>
- Date: Tue, 8 Oct 2013 10:39:44 -0700
- To: Bernard Vatant <bernard.vatant@mondeca.com>
- Cc: PublicVocabs <public-vocabs@w3.org>
- Message-ID: <CAMbipBtjXPAMoD35c9CkjVrhgsy1nM7ACOz_pNoXnRw_ytkbAg@mail.gmail.com>
Bernard, to provide a general answer to both of your questions parenthetically prefaced "from a SEO point of view," I've yet to see any evidence that any search engine has ever used any external URI provided in schema.org markup in order to produce a rich snippet, change the ranking order of web pages or return a resource in the SERPs based solely on such a reference. This doesn't mean that the search engines *aren't* ingesting and using these data, only that there's no observed evidence that they're doing so. (I don't know whether Martin Hepp or anyone else has observed a demonstrable impact in the SERPs as a result of referencing productontology.org URIs via additionalType - I'd certainly be interested in hearing of such cases if they exist!) But this lack of evidence is not unimportant from an SEO practitioner's point of view, because as a result there's no incentive to employ such mechanisms: the demonstrated "added value" is zero. On Tue, Oct 8, 2013 at 10:06 AM, Bernard Vatant <bernard.vatant@mondeca.com>wrote: > Let me make my point differently. > > Maybe this is obvious for all users of schema.org, please point me to the > relevant resources if it's the case. > > I want to say that my content (page/section) is about "Sustainable > agriculture". > > I have a skos:Concept for this, defined in a good reference vocabulary > http://id.loc.gov/authorities/subjects/sh87004216 > > I can already use in the current state of affairs, the schema.org/aboutproperty to mark my page with this URI, right? > > Q1. What is the current added value (from a SEO point of view) to mark > with this URI vs marking with the string "Sustainable agriculture"? And > particularly what is the added value of having this URI being defined as a > skos:Concept in a most authoritative Concept Scheme (LCSH), instead of any > other URI such as > http://dbpedia.org/page/Sustainable_agriculture > > http://www.actu-environnement.com/ae/dictionnaire_environnement/definition/agriculture_durable.php4 > > Q2. What would be the added value (always from a SEO point of view) to add > a schema.org type (whatever its name) to this URI indicating in the > markup that this URI is indeed a skos:Concept belonging to a > skos:ConceptScheme, namely LCSH (which you can discover by dereferencing > the URI anyway, but do search engines follow their nose in the markup)? > > (Thinking about it I have the same question for the use of any reference > URI, be it a skos:Concept or not. What do you gain if any by using > http://id.insee.fr/geo/departement/05 instead of the string > "Hautes-Alpes" in a schema.org/Place description?) > > Bernard > > > > > > > > > > > > > > 2013/10/8 Vicki Tardif Holland <vtardif@google.com> > >> >> On Tue, Oct 8, 2013 at 10:41 AM, Karen Coyle <kcoyle@kcoyle.net> wrote: >> >>> I actually read the discussion differently. It's not so much that people >>> want to express topics in the KOS sense, but that they want to refer to >>> controlled lists within their data, and SKOS covers that. SKOS gives you a >>> way to define a finite list with a few useful relationships. I think it's >>> the mechanism of SKOS that people are looking for, more than the KOS value. >>> >> >> I had the same interpretation. >> >> I know that controlled vocabularies are sometimes seen as a nuisance >> outside of the library realm, but they are useful in the cases where >> programmers want an enumeration. SKOS is even better than a flat >> enumeration, because the vocabulary can have a hierarchy, allowing for >> inheritance. >> >> As an example, we have been working through a proposal to support civic >> services in schema.org. One of the properties of a service is >> "serviceType". It would be nice to be able to encourage people to use >> something like openelegibility.org's taxonomy so that we have some hope >> of sorting out the services automatically. >> >> - Vicki >> >> >> Vicki Tardif Holland | Ontologist | vtardif@google.com >> >> > > > > -- > *Bernard Vatant > * > Vocabularies & Data Engineering > Tel : + 33 (0)9 71 48 84 59 > Skype : bernard.vatant > Blog : the wheel and the hub <http://bvatant.blogspot.com> > Linked Open Vocabularies : lov.okfn.org > -------------------------------------------------------- > *Mondeca** ** * > 3 cité Nollez 75018 Paris, France > www.mondeca.com > Follow us on Twitter : @mondecanews <http://twitter.com/#%21/mondecanews> > ---------------------------------------------------------- >
Received on Tuesday, 8 October 2013 17:40:16 UTC