topical article: https://www.linkedin.com/pulse/why-sql-right-querying-json-kurt-cagle
On Tue, Nov 3, 2015 at 10:09 PM, Stephen Cameron <steve.cameron...@gmail.com > wrote: > Also relevant to the discussion I think, 'dynamic' classes generated from > metadata. > > > http://www.eclipse.org/eclipselink/documentation/2.4/moxy/dynamic_jaxb001.htm > > On Tue, Nov 3, 2015 at 9:56 PM, Stephen Cameron < > steve.cameron...@gmail.com> wrote: > >> I cannot help much there, but looking about myself I see that some are >> using Neo4j to visualise ontologies [1]. >> >> In terms of building applications using linked data as the foundation, I >> have come across Callimachus [2], but no experience as yet. >> >> My interest has come from the database and data management side, more >> than the business application side. In that respect I know that linked data >> is starting to take off and those that I respect like it alot [3][4]. >> >> I would say the best ontologies are in the medical realm. a quick search >> results in [5] >> >> [1] https://github.com/SciGraph >> [2] http://callimachusproject.org/ >> [3] http://www.marklogic.com/what-is-marklogic/features/semantics/ >> [4] >> http://blogs.avalonconsult.com/blog/search/semantics-search-marklogic-7-gets-rdf/ >> [5] https://github.com/OGMS/ogms >> >> On Tue, Nov 3, 2015 at 9:15 PM, Dan Haywood <d...@haywood-associates.co.uk >> > wrote: >> >>> was just poking around for an example ontology that one might play >>> with... >>> the BBC looks like a good bet [1]. >>> >>> I suspect that there's some way to access the semantic web that drives >>> its >>> web pages in a machine processable form. This guy [2] seems to have >>> published some useful stuff in this area (works for the Beeb). >>> >>> Dan >>> >>> [1] http://www.bbc.co.uk/ontologies/bbc >>> [2] http://raimond.me.uk/pubs/ >>> >>> >>> On 3 November 2015 at 02:16, Stephen Cameron <steve.cameron...@gmail.com >>> > >>> wrote: >>> >>> > On Tue, Nov 3, 2015 at 11:24 AM, Dan Haywood < >>> d...@haywood-associates.co.uk >>> > > >>> > wrote: >>> > >>> > > On 2 November 2015 at 23:27, Stephen Cameron < >>> steve.cameron...@gmail.com >>> > > >>> > > 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 >>> > > >>> > > >>> > > Encouraging, I have browsed around in the meta-model code, but very >>> > casually! >>> > >>> > I am hoping that others might like to work through a design on this >>> mailing >>> > list, hence my suggestion of doing the course, so we are all on the >>> same >>> > page (mostly) at the start. >>> > >>> > Open-source CMS systems have gone down the semantic path a bit, such as >>> > semantic wikis. The idea of using a conceptual model as the interface >>> to a >>> > database has a long history but never seems to make it as a mainstream >>> > thing (See for example Object-Role-Modeling). Microsoft has Entity >>> > Framework but that still seems a logical model to me, a tool to help >>> > programmers. >>> > >>> > But I believe DDD has this conceptual model idea at its core in terms >>> of >>> > the Ubiquitous Language. That by being precise about the meaning of >>> terms >>> > new insights are gained. >>> > >>> > That OWL is widely used might make it a good choice. What the user >>> sees >>> > does not necessarily have to be lots of URIs, these are essentially >>> just >>> > names within namespaces (same as class names within a package names), >>> its >>> > just a means of classification. >>> > >>> > Cheers >>> > >>> > >>> > >>> > >>> > > >>> > > > Regards >>> > > > Steve >>> > > > >>> > > > >>> > > > >>> > > > >>> > > > >>> > > > On Tue, Nov 3, 2015 at 6:25 AM, Dan Haywood < >>> > > d...@haywood-associates.co.uk> >>> > > > 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 < >>> cesar.l...@sisorg.com.mx> >>> > > > 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:d...@haywood-associates.co.uk] >>> > > > > > 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 < >>> > > > steve.cameron...@gmail.com >>> > > > > > >>> > > > > > 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 >>> > > > > > >>> > > > > > >>> > > > > >>> > > > >>> > > >>> > >>> >> >> >
