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Questions tagged [rdf]

The Resource Description Framework (RDF) is a language for representing information about resources in the World Wide Web. It is a syntax independent data model that may be serialised in a variety of concrete syntaxes. RDF is the core data format used on the Semantic Web.

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24
votes
7answers
7k views

How can I download the complete Wikidata database?

Wikidata is a new Wikimedia project: It centralizes access to and management of structured data, such as interwiki references and statistical information. This data would be of enormous interest ...
14
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2answers
243 views

5-star Open Data rating scheme, are there URIs for the ratings?

I'm in the process of constructing a DCAT catalogue and we want to show how each dataset conforms to the 5-star open data rating scheme. I assumed that someone would have coined URIs for each rating ...
13
votes
5answers
359 views

How to publish open data on my website? (Or: from CSV to RDFa)

I already spent some time importing data in a tabular form from a PDF published by an official institution. I would like to publish this table on my website. The data is nicely formatted in CSV. Is ...
12
votes
2answers
303 views

Where to upload open data? (no online data editing needed)

I have CSV and RDF files that I would like to upload somewhere so that everyone can download them. What is the most appropriate website for this? I need at least: Easily upload, just select the ...
11
votes
3answers
341 views

Why isn't RDF more popular within the private sector?

I've learned about the idea of storing data in the form of triples not too long ago. This is essentially what RDF allows and since I've started using this to model my data, I've never really looked ...
11
votes
2answers
788 views

How to embed licenses within SVG?

This is a split refactored from an older post containing too many questions about licenses in SVG Tiny 1.2 using RDFa as suggested by Patrick Hoefler. See also question Interest of double lincenses CC-...
9
votes
6answers
2k views

What Linked Data serialization format to choose for our (now CSV) open data?

We have open data as a CSV file, about 200k lines, columns are mostly text. In order to make it into Linked Data and be easily reusable by as many mashups/apps/etc as possible, we want to propose ...
9
votes
2answers
420 views

What needs to be done to be 4 or 5-star open data?

I work at a University which is trying to open up some of its data. We make some of our data available as PDF or Excel documents. The 5-star deployment scheme has been referenced a fair bit in Europe ...
6
votes
1answer
307 views

Mapping CSV Header to RDF + SPARQL console

I would like to know your opinion about the next system: with a large CSV file convert it's header to RDF schema, in which exists only the CSV columns information and access point. This way there's ...
5
votes
2answers
248 views

How to work with RDF formats

I recently downloaded a ZIP file in RDF format from the Barcelona Open Data web page. This format is a subset (or that is what I understand) of XML. I’ve been trying to parse it with an objective C ...
5
votes
1answer
226 views

Why is the Open World assumption so central to the semantic web?

The semantics of RDF is known to be based on the open world assumption. What does that mean? How does that show up in the RDF Semantics? And why does it help in data integration?
4
votes
1answer
185 views

Are there any dataset for psychology

I am looking for a triple RDF dataset or vocabulary for a psychology website I am developing. I have a large XML schema database and am looking to translate this database to one RDF serialization ...
4
votes
1answer
105 views

A license catalog project with RDF description, exist?

(Edit after first answer to avoid cross-post) Popular public copyright licenses like GPL3, MIT, Apache2, CC-BY-SA3, etc. have official human-readable texts, and, I suppose, in nowadays, have also ...
4
votes
1answer
104 views

Which RDF predicates to use to annotate: fileX “has hash” 01ABCF “of type” sha256 “downloaded from site” http://url/to/page?

Which predicates to use: (let's use Turtle syntax) @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @prefix file: <http://domain.I.own/my_rdf_space_for_file_ids/> . @prefix q?...
3
votes
1answer
323 views

What triplestore that can handle the largest number of triples?

A triplestore is a special database engine containing information triples and answering to SPARQL requests. What is currently the triplestore that can contain most triples, while still being able to ...
3
votes
1answer
42 views

YAGO entity details

I recently came across an article where they have mentioned that YAGO has more entities than DBpedia. It also mentions that "Recently, a new version of YAGO has been released, which also accounts for ...
3
votes
0answers
64 views

(How) Was SPARQL influenced by erotetics?

Erotetics is the logic of questions and answers. The field has been developed over the last hundred years and is nicely summarized by (Wisniewski 2015). How, if at all, was SPARQL, the RDF query ...
3
votes
0answers
23 views

Is there any available dataset describing types of sensors (ideally using SSNO)?

I am developing an application that tries to predict what type of sensors would be needed in a working environment to achieve certain goals. In order to function, this application needs to know (A) ...
3
votes
0answers
52 views

Should a Linked Data Platform (LDP) server answer to a request for a container that does not exist in the dataset?

I'm developing a partial implementation of the LDP specification and I have the following issue: Suppose that my dataset contains book resources with URIs like: http://example.org/book/lord-of-the-...
2
votes
2answers
70 views

How to get specific wikipedia data?

I only want to use the link structure and articles’ content of Wikipedia. Therefore, I want to downlaod the dump that contains only the following details. articles content link structure (i.e. re-...
2
votes
2answers
113 views

API to use Klink-2 Computer Science Ontology (CSO)

I came across this interesting paper that make use of the Klink-2 Computer Science Ontology (CSO): Automatic Classification of Springer Nature Proceedings with Smart Topic Miner Where can I find an ...
2
votes
1answer
36 views

What tool can I use to manage a researcher network bibliography?

I am making a website for a researcher network using Jekyll and hosting it on github pages. Each researcher (250+ people) should have his own document with an up to date bibliography. I could ...
2
votes
1answer
188 views

How to express that a schema.org/Restaurant is located in a given Wikidata geographical entity?

I created this RDF restaurant description... <rdf:Description rdf:nodeID='Nb925d432-69b1-42e0-8063-d914e3504dde'> <rdf:type rdf:resource='http://schema.org/Restaurant'/> <schema:name&...
2
votes
0answers
33 views

Wikidata SPARQL - get company entities and the location of their headquarters

I'm having trouble extracting location attributes of company HQ's. My query: finds all companies or sub-classes, and returns some basic properties such as ISIN and URL, and the Headquarter location. ...
2
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0answers
44 views

How to use wikidata property paths?

Given a term/concept, I want to decide if it belongs to computer science. For that, I am checking if the concept has a property path to computer science node. In other words, I am checking whether ...
2
votes
0answers
30 views

Real world objects and digital contents represented in RDF

Not sure if this is the appropriate forum for this question, especially after the Dataversity Q&A site shutdown, so please feel free to suggest better avenues. I am implementing an LDP server ...
1
vote
1answer
52 views

How to find the wikidata ID of a DBpedia concept?

I have a set of DBpedia concepts and would like to get the corresponding wikidata IDs of them. For example, consider word2vec. The wikidata ID of word2vec is wd:Q22673982. Currently, I have the ...
1
vote
1answer
46 views

How to identify general terms using LOD?

I want to identify general medical terms such as human, patient, hospitals, drugs using LOD (e.g., wikipedia, dbpedia, wikidata etc.). In other words I am referring to medical terms that are less ...
1
vote
1answer
55 views

Can we use DBpedia for identifying Polysemy of words?

I want to detect words with Polysemy in a given text in descending order. That the word that has multiple meanings should be in the top of the list, and words with least Polysemy should be in bottom. ...
1
vote
1answer
72 views

Data integration tool that supports Semantic Web

I've multiple data sources (files or API data). I want to integrate all these sources using one common ontology. I've started using Karma Information Integration Tool; however, I'm facing some ...
1
vote
1answer
66 views

How to build a concept hierarchy using LOD?

I am interested in building a concept hierarchy using the given Computer Science related concepts. For an example we can consider 'support vector machine', whether the parent category would be '...
1
vote
1answer
178 views

Expressing restaurant information in RDF/XML

I am extracting a dataset from Wikivoyage's restaurants, and would like to have some feedback, to know how I can improve it before publication. For instance, this Wikivoyage restaurant description in ...
1
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0answers
23 views

What is the difference between resource and category of DBpedia

My initial understanding of DBpedia was that resources are lower level entities and categories are higher level entities. Since categories are higher level, I thought that they do not have a ...
1
vote
0answers
58 views

How to identify general medical terms using Wikipedia/DBpedia/WikiData

Given a list of medical terms, I want to identify and remove the general (less granular) terms. For example consider the below mentioned word list: - kartagener s syndrome - disease treatment - ...
1
vote
0answers
25 views

Ontology for QoS, i.e. download/upload speed, throughput

There are lots of papers, but don't publish their actual ontology, only give you figures/graphs (i.e. QoSOnt, OWL-QoS). Is there a properly hosted ontology with an actual owl file and namespace ...
1
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0answers
45 views

What limitations, if any, are there on what kind of concepts can be declared using RDF?

I wanted to ask about limitations on the "concepts" that can be defined using RDF or OWL. Some concepts such as the economic term "inflation" or the concept "overwork" (as when someone works too much) ...
0
votes
1answer
72 views

How to extract DBpedia infomation

I wrote a python programme to extract the DBpedia links for a given document using DBpedia Spotlight. Now I am interested in getting the skos:broader property and dcterms:subject property for each ...
0
votes
0answers
10 views

Ontology for theme of a text

I'm looking for an ontology that describes the theme of a text (eg. "finance", "leisure"). A text can have multiple themes. Preferably the ontology would also have room to store a match percentage: { ...
0
votes
0answers
16 views

How come there are missing entities in this SPARQL query?

I was interested in listing all books, so I wrote: SELECT ?book ?url WHERE { ?book wdt:P31 wd:Q571 . OPTIONAL { ?url schema:about ?book . ?url schema:inLanguage "en" . ?url schema:isPartOf <...