sparql

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SPARQL Query returns 0

i´ve this individuals in my ontology:  <owl:NamedIndividual rdf:about=\"&Public_Contracting;CPV1\">[详细]

2023-04-02 13:30 分类：问答
RDF integers in R

I\'m loading data through rrdf in my R app. I can handle the URIs开发者_如何学Go no problem, but when it comes to integers I don\'t know how to convert them into R integers. E.g. 5^^http://www.w3.org/[详细]

2023-04-01 14:43 分类：问答
SPARQL query for DBPedia + CIA Factbook +data GOV

I have 开发者_运维技巧below 2 queries. The first query retrieves the literacy rate from CIA Factbook endpoint available at http://www4.wiwiss.fu-berlin.de/factbook/sparql. The second query is for the[详细]

2023-04-01 06:28 分类：问答
How to build SPARQL queries in java?

Is there a library, which is able to build SPARQL queries programmatically like the CriteriaBuilder in JPA or to build the queries li开发者_如何学编程ke with a PreparedStatement for SQL?[详细]

2023-03-31 16:50 分类：问答
how to search rdf with sparql using java?

I am doing project in semantic web where i use SPARQL to query rdf data.I used java in netbeansand my problem is my program runs,inputs the rdf file and the query executes but the WHERE area of my que[详细]

2023-03-31 15:12 分类：问答
Ruby on Rails SPARQL client

I\'m currently working with the Ruby on Rails SPARQL client to try and retrieve information from the public SPARQL endpoint at dbpedia. The generic query I\'m running is the following:[详细]

2023-03-29 20:22 分类：问答
SPARQL, RDF & processing Data

I\'m new to this entire semantics stuff, and i\'ve been plunged into a project which requires me to use the SPARQL endpoint from dbpedia to retrieve information about certain things such as a City for[详细]

2023-03-29 15:38 分类：问答
selecting using sparql based on 'triple does not exist'

I need a little help selecting the right triples from my st开发者_JS百科ore.... <a> a <type/1> .[详细]

2023-03-28 23:53 分类：问答
Weird SPARQL pattern matching in 4store?

Suppose I have a RDF-base containing 4 triples: \"John\"\"loves\" \"sushi\" \"John\"\"loves\" \"Mary\" \"Frank\" \"hates\" \"sushi\"[详细]

2023-03-28 22:49 分类：问答
Info on SPARQL Queries

I need to work on SPARQL queries. Does any one has good links to learn SPARQL queries? I am looking good article on syntax of the SPARQL queries and examples s开发者_如何转开发o that I could learn it[详细]

2023-03-28 19:46 分类：问答