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kbpedia's Issues

Question about actual contents

I've downloaded the snapshot and loaded the contents of kbpedia_reference_concepts_linkage_inferrence_extended.zip in a triplestore.

The following query returns 207984 as number of entities, 626131 as the number of objects, and 1503796 as number of triples.

SELECT (count(distinct ?s) as ?nent) (count(distinct ?o) as ?nobj) (count(*) as ?nt)
FROM <kbpedia>
WHERE {
  ?s ?p ?o.
}

question: is this correct? What is the reference in the readme to 30M entities?

Thanks

IOT Ontology integration

Hi. Do you have ontologies for IOT domain (sensor devices) such as SenML, SSN, or SAREF ontology integrated in KBpedia? Do you plan to add that use case as well?

Missing entities and linkages

On the KBpedia home page it is stated that-

"KBpedia, written primarily in OWL 2, includes more than 58,000 reference concepts, mapped linkages to about 40 million entities (most from Wikidata), and 5,000 relations and properties."

I am familiar with the resources made available on your Github page. However, I am unable to find the linkages to the stated "40 million" entities from the other ontologies. The linkages that are provided on Github seem to cover only a very minor portion of this. For example, the wikidata linkages file contains approximately only 46000 relations.

I would appreciate it if you could let me know if there's something I am missing, or the entire linkage data to the 40 million entities is indeed not made available for public use.

Syntactically wrong altLabels in knowledge graph?

I noticed that in https://github.com/Cognonto/kbpedia/blob/master/versions/1.60/kbpedia_reference_concepts_linkage_inferrence_extended.zip there are some altLabels stored in one literal, each seperated by ||, e.g.:

skos:altLabel "Your Paintings collection identifier||BBC Your Paintings collection identifier||Art UK collection identifier"@en ;

Whereas others are written in statements with multiple objects (literals):

skos:altLabel "apartments"@en , "flat"@en , "flats"@en ;

As far as I know, only the second statement is valid N3, right? At least Apache Jena, into which I am reading the file, will only parse the second statement correctly (as 3 independent triples) but not the first.

This may also be some issue with Apache Jena... if so I am sorry to have bothered you.

Copy edit contributions

Mike and Fred, congrats on the milestone. I started using the web interface and my second search on "climate" returned an entry with climate misspelled ("climage"). Is there some way I can submit suggestions for content edits?
I am looking forward to looking further into your work here.

Issues using KBpedia demo page

Hi, I am trying to figure out how to use KBpedia

I went through the demo page: https://kbpedia.org/demo

It says:

KBpedia exploits large-scale knowledge bases and semantic technologies for effective machine learning and data interoperability. Here are some example ways that KBpedia may power knowledge management-oriented Web services or APIs. Try it for yourself:
Analyze Web Page
Enter a full URL below to see some example uses of KBpedia:

It is unclear as what kind of URL should be put there, and what KBpedia will produce from this URL. Will it try to match it to your KKO and returns metadata about this concept? Will it try to parse the content of the provided URL for concepts (json-ld, RDFa, etc)?

I tried to put URLs of concepts from DBpedia and Wikidata (e.g. https://www.wikidata.org/wiki/Q90), but the demo seems to fail due to loading mixed content (loading HTTP webpages from HTTPS), even if I am providing a HTTPS URL to the Wikidata page

Analyzing a web page leads to this page:

Screenshot from 2021-02-09 13-04-48

I tried on Google Chrome and Firefox (on Ubuntu 18.04) and get the same mixed content error. I also tried to access KBpedia through HTTP: http://kbpedia.org/demo which should prevent mixed content errors, but the website is automatically redirecting to HTTPS

Is there anything I can do to make it work on my side? And what kind of URL can be provided to the KBpedia demo endpoint?

Local imports

You have an imports to a local file:

<http://kbpedia.org/kbpedia/rc#> a owl:Ontology ;
	owl:versionIRI :v250 ;
	owl:imports <https://www.w3.org/2009/08/skos-reference/skos-owl1-dl.rdf> , <file:///kbpedia/2.50/owl/kko.n3> ;
	dc:date "2020-02-24T20:00:00Z"@en ;

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