Welcome to the Semantic Web group in Drupal. This group was started at DrupalCon Barcelona 2007 and includes discussions on how to integrate the Semantic Web technologies into Drupal and list the various effort of the community towards enabling RDF in Drupal. Drupal 7 comes with native RDFa support in core. If you want extra RDF capabilities such as other serialization formats and SPARQL support, checkout the RDF Extensions, SPARQL and SPARQL Views contributed projects. If you need support or have found a bug in one of the fore mentioned projects, please file a ticket in their issue tracker (block on the right on each project page).
For Drupal 8 we're planning to split the RDF module into two decoupled modules:
The RDF module will only care about defining the mappings with the entity types and the fields, without dealing with any syntax/presentation. Thus it won't do much on its own, but other modules can rely on it to output data.
The RDFa pieces of the existing D7 RDF module will be moved into a new module that relies on the RDF module to get the term mappings and constructs the RDFa markup from these mappings.
I'm wondering if anyone has done any work on importing Facebook groups wholesale into Drupal Organic Groups? I know we can export all the data from a Facebook group using the Facebook API. I guess the main task is to how to map Facebook comments (with revisions?), users, events and pages to a local Drupal instance. I guess make placeholders for these Facebook objects and allow these to be acquired retrospectively? Any ideas? Any projects with similar aims?Read more
I would like to initiate a project where the A.L.I.C.E. chat bot reads RDF from a site and uses it to respond to queries. The A.L.I.C.E. people (alicebot.org) are on board and have already linked their bot with RDF but we need some people who are knowledgeable with RDF in Drupal to make this happen.
I intend to start a Kickstarter campaign to fund this project.
Please let me know if you are interested in an initial conference call to discuss the parameters and to come up with a budget.
I hope this isn't a dumb question, but do the drupal RDF* modules support having a separate RDF database like Neo4j or others?
It seems that any full-scale semantic application implemented with Drupal will very quickly grind to a halt if the data is stored in an RDBMS.
If there's been any discussion, drupalcon talks, or similar on this subject, I'd be very interested to click on that.
RDF support in Drupal has been implemented with this model in mind:
Node = RDF subject
Field = RDF predicate
Field value = RDF object
This is a wonderful solution for most of Drupal content where the content type is ontologically connected to the field by a predicate.
RDFx allows for fields to be expressed as RDFa. Sometimes RDF concepts exist in other locations, for example DBpedia, and not as part of the local taxonomies. What is the recommended way to link to these external resources? These resources do have persistent URIs, so I guess the simplest thing to do is to make the field into a link. But ideally one would prefer to get a good label to show on the HTML output rather than the link itself. RDF Proxy (http://drupal.org/project/rdfproxy) seems to be doing that but the project appears to be abandoned. Any ideas?
the Version 1.0 of Callimachus project has been released.
Would be possible to integrate Callimachus with Drupal,so as to easily make open data/linked data applications?
If the value of a text field is a URI and I set the 'Attribute Type' in the RDF Mappings panel to 'rel' then in the RDF produced by the restws this appears to be ignored. e.g. adding an owl:sameAs for a URI in a text field produces RDF/XML like this:
When is should look like this:
<owl:sameAs rdf:resource="http://scied04.rbge.org.uk/bci/cool/5dxa-1bav" />
The method in rdfx.module that appears to do the business here is thisRead more
I am trying to port a bespoke system we have running to Drupal 7.
We publish stable URIs using the Cool URIs 'specification' http://www.w3.org/TR/cooluris/
An example of a URI that works on the same principle (not the system I am porting) is this:
Call it with a browser and you get a 303 redirect to a human readable resource. Call it with curl -L and you get RDF.
You can check it on the Vapour validatorRead more
Being a Drupal newcomer, I am working on two projects where we would like to consume defined and existing RDF-data in the search query coming out of our library catalogue (using Drupal). Our main aim is to query a RDF-container and then display a result-set of records from our catalogue. The records to be displayed from our catalogue will contain the ID of the "found" RDF-data-element.
RDF-core in Drupal7 seems to do what we want, but I need to give further specifications to several of our partners and I lack the detailed information so far.Read more
I have startup a website that make use of RDF knowledge from wiki.dbpedia.org/ now it's up and running but still in crawling baby phase. The aim of the website is to let user find the information quickly, easily and get more informative and useful information from the linked knowledge. The website is at http://qwerq.com/ , to browser the knowledge try those link in Structured Knowledge section.
That's one of the component, the website also have common functional tools, such as currency converter, unit converter, dictionary, calculator, simple text processing, etc.Read more
I am making a new site for real estate(selling/renting houses etc.)
I would like to ask your opinions/ideas what semantic technologies can I use on my site.
I also want to expose my date as open/linked data so as everyone can use them.
thanks in advance
There's been lots of discussions on various approaches for serializing entities in the WSCCI group and with Drupal 8 feature freeze only a few months away, it's time to start coding. JSON-LD was chosen as a potential good candidate for serializing Drupal entities. One of the key features of JSON-LD is the ability to include a
@context along with your data. This context describes the data present in the JSON document and is useful for consumers to understand how to best make use of the data.
I'm trying to set up a site about projects (http:/zbw.eu/labs), described by the doap ontology. Some of the metadata items for these projects (e.g., the descriptions) are provided in English and German. The custom node type for the projects is configured with entity/field translation. Currently, I use URL path prefixes for language detection. So far, a pretty straightforward setting.
However, I want to publish ONE URI for the project itself (besides the different URIs for language specific content). What the rdf module gives me currently, with an url alias in place, is
about="/labs/en/project/zbwlabs" (for the English page), OR about="/labs/de/project/zbwlabs" (for the German page)
whereas "/labs/project/zbwlabs" would be more appropriate to talk about the project itself.
Is there a standard way, or are there best practices deal with this? I'm not sure if the solution I found (see below) is a good fit.Read more
I've cross-posted this to both Semantic Web and Libraries because I think there are elements that appeal to both.
I'm going to give a bit of background on the project I'm working on and hopefully I can get some confirmation as to whether or not this is the "best" way to go about doing this. This is Drupal 7, of course. So far, I've been moving in the most obvious direction and using the tools that are most readily available.
Drupal Hacker / Co-Founder sought for London start-up & Equity? Development is well under way already! | www.sboj.com
We're 2 years into development of a large start - up project, we have raised significant Angel Funding and we're looking to expedite the development process to have a deployable product as soon as possible.
We're looking for a pretty savvy Drupalist to join the team on an equity / equity + cash basis to assist the current CTO and 1 senior developer in finishing the product off.Read more
I am administering a D7 site with the RDFx module and UI extension deployed. I see with my vocabularies I can define rdf mapping for the entire vocabulary, that exist on every term, but I don't see a way to define a mapping for a single unique taxonomy term.
Is there a way to support this behavior?