On 2 November 2015 at 23:27, Stephen Cameron <[email protected]> wrote:
> > What relevance of this too Apache Isis? Well you nearly got it straight > off, that the Isis meta-model is a model that maybe can be exported as OWL. > I don't think so as its more of logical model than a conceptual one. I am > thinking the other way around, that a conceptual model in OWL, or something > else, could be the basis of the Isis meta-model. > > > Also very interesting. I think this would be doable... further thoughts below. > The thing that led me to Isis was that half of this picture is already > done, the model to UI part, I thought maybe I could add the other half > (person to model)? Yes, perhaps... Now that we have view models as first-class citizens, I could imagine an Isis application where every semantic resource could be surfaced as an view model (@DomainObject(nature=EXTERNAL_ENTITY) is probably how I would model it). Or, an alternative would be treat them as regular persisted entities via DataNucleus, and use DN's Store API to know how to query a semantic web of resources. However, that's one extra layer to worry about which may or may not work. Sticking with Isis view models is probably easier. > Also the meta-model in Isis is a OO model, which is > nearly what you want perhaps? As you know, the way in which Isis builds up its metamodel is quite flexible (the FacetFactory API). In Isis' default programming model there is a "special" FacetFactory called "PropertyOrCollectionIdentifyingFacetFactory" that is used to infer the initial "know-what" structure of each domain class. I could imagine a similar facet factory for the semantic web that queried the OWL metamodel (?) to ask which triples exist for a particular resource. > That is what I want to get a handle on via > this course. > > Good stuff; will hear back presently no doubt! Thx Dan > Regards > Steve > > > > > > On Tue, Nov 3, 2015 at 6:25 AM, Dan Haywood <[email protected]> > wrote: > > > Thanks for the precis, Cesar... very interesting. > > > > Clearly in Isis we have a lot of the information in our metamodel that > > could be the input for a semantic web ontology; I'd appreciate > > understanding how this information is "exported" such that an Isis app > can > > also be considered as a "semantic web app" (if that's even a term...) > > > > cheers > > Dan > > > > > > On 2 November 2015 at 15:59, Cesar Lugo <[email protected]> > wrote: > > > > > Dan, I think this is an important and very interesting topic. I have > some > > > basic knowledge of the semantic web concepts, and I have done some > > > significant prototyping using semantic web tools, just far from being > an > > > expert or knowledgeable person. As far as I k now, the semantic web > > concept > > > was developed by the father of the www, and it adds semantics to the > web > > > content, and to the web applications as well. This has also been called > > the > > > Web 3.0, and the semantic web technologies go from adding semantics to > > the > > > web pages, to build entire semantic applications. > > > > > > On the UI web pages side, it adds semantics embedded within the HTML > with > > > semantic extensions, so a browser would be able to know more > information > > > about the semantics of that page. For example, when you look at an > > amazon's > > > web page and find a book, you know that you are looking at a book, you > > know > > > what a book is, you know it's about growing apples, and you know some > > > numbers besides it are the different prices of the book, and the text > > > besides it is an overview of the book's contents. The browser, > currently > > in > > > web 2.0, does not know any of those semantics, but just the page > content > > in > > > terms of things like fields, controls and links. The semantic web lets > > the > > > browser infer all those semantics from the web page, buy using > ontologies > > > and extended dictionaries (they are currently creating ontologies based > > on > > > Wikipedia content, but structured so the systems can understand and > infer > > > meaning, not just content). The idea is that having the browser know > the > > > semantics, it will help interact among other systems in a more > semantical > > > way, like, for example, if you are interested in growing apples, then > you > > > might also be interested in growing some kinds of organic food. > > > > > > Then, at the domain logic layer, you use ontologies (expressed in RDFs) > > to > > > represent your domain, which allows you to re-use existing ontologies > for > > > common topics like a customer, a vendor, a company, the relationship > > among > > > people (like the FOAF friend of a friend ontology), a product, and > more. > > > Then, there is a language called SPARQL, similar to SQL, but works at > the > > > ontology level. All that and more lets you create your apps with > semantic > > > content all over the app, not only at the UI. Your application will be > > more > > > knowledgeable about the semantics of the topics (domain objects) within > > it, > > > so you can use knowledge management methods to define and manage your > > > domain logic and your exposed content, and interact with other systems > > at a > > > semantic level. > > > > > > Cesar. > > > > > > -----Original Message----- > > > From: Dan Haywood [mailto:[email protected]] > > > Sent: Monday, November 2, 2015 2:52 AM > > > To: users > > > Subject: Re: Course of Interest > > > > > > Shall be interested to hear your thoughts on this... not a subject I > have > > > any knowledge of. > > > > > > cheers > > > Dan > > > > > > On 2 November 2015 at 02:40, Stephen Cameron < > [email protected] > > > > > > wrote: > > > > > > > Hello Apache Isis Community, > > > > > > > > I am about to start an free online course on Semantic Web > > > > Technologies. At the moment the connection to Isis is not clear, but > I > > > > have ideas. I am doing this course to see if my ideas have any > > > > relationship to reality, specifically in regard to conceptual models. > > > > > > > > https://open.hpi.de/courses/semanticweb2015?locale=en > > > > > > > > Regards > > > > Steve Cameron > > > > > > > > > > > > > --- > > > This email has been checked for viruses by Avast antivirus software. > > > https://www.avast.com/antivirus > > > > > > > > >
