rdf-file | tool component for processing structured text files | Data Manipulation library
kandi X-RAY | rdf-file Summary
kandi X-RAY | rdf-file Summary
Rdf-File is a tool component for processing structured text files
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Top functions reviewed by kandi - BETA
- Splits the file
- Returns the current entry
- Get tail file path
- Get source paths list
- Parse a single row
- Parses a string into an RDFFunctionSpi object
- Serialize a row to a String
- Get parameter from template config
- Init the condition
- Retrieves the column meta
- Deserialize a single line
- Returns a string representation of this object
- Returns the row data
- Pre - serialize a line
- Merge RDF file
- Serialize a single row
- Renames file
- Deserialize row
- Count the number of columns
- This method sorts the file and returns the result
- Process the summary data
- Perform the split and sort
- Deserialize a line
- Validates the RDF file
- Returns the sorted list
- Returns the sorted string
rdf-file Key Features
rdf-file Examples and Code Snippets
Community Discussions
Trending Discussions on rdf-file
QUESTION
I have an RDF-file stored on my server. The file or at least the file-content should be uploaded to a remote GrapbDB over API.
On the documentation there are two ways to do this. The first one is uploading it to server files and then loading it to GraphDB. Here the problem is, that I am not the owner of the server, GraphDB is running. So I can`t upload it to server files. Or is there maybe another API for that?
The other way is providing a public API on my server and then trigger GraphDB to download the file from my server. But my API must be protected with credantials or JWT. But I don´t know how to set the credantials in the API-Call.
Isn`t there a way to upload a simple graph to a repository?
...ANSWER
Answered 2020-Sep-08 at 13:39There is a browser-based user interface in GraphDB that allows you to import from local files. If this is allowed on the server you are connecting to, and you only need to do this once then I think this would be the quickest route to go.
If you want to upload a local file to GraphDB using dotNetRDF, then I would advise you to use the SPARQL 1.1 graph store protocol API via the VDS.RDF.Storage.SparqlHttpProtocolConnector
as described here. The base URL you need to use will depend on the configuration of the server and possibly also on the version of GraphDB that it is running, but for the latest version (9.4) the pattern is: /repositories//rdf-graphs/service
The connector supports HTTP Basic Authentication (which is one of the options offered by GraphDB) so if you have a user name and password you could try the SetCredentials
method on the connector to specify those credentals and if necessary force the use of HTTP Basic Authentication by setting the global options property VDS.RDF.Options.ForceHttpBasicAuth
to true.
QUESTION
I am trying to import a RDF-Ontology to Protégé or to webvowl. There seems to be a problem with the RDF-File, because the import doesn't work, I always get an error (parsing failed).
The ontology I want to use is FRBR-Core. In addition to FRBR-Core, there is also the ontology FRBR-Extended. Oddly,the RDF-File for FRBR-Extended can be imported to Webvowl and Protégé, so this file does work. I looked at the RDF-Files of both core and extended version, hoping that I would find a difference that explains, why one file does work and the other doesn't, but I couldn't find anything.
I copied the FRBR-Core-Ontology into the OWL Validator, to see what's wrong. The error I get is:
Does anyone understand what that means? Or does anyone know at all, what the problem with FRBR-Core is?
Thanks in advance!
...ANSWER
Answered 2020-Aug-14 at 07:23Previous answer: this is correct in its description of why relative IRIs are a problem, but wrong in thinking it applies here.
The ontology iri in the file starts with
string:
, which is not a valid network protocol(edit: according to the validator. The protocol is valid but the validator is restricted to urn:, http:, https:). Therefore, the IRI is relative, meaning that it will be resolved against the base IRI if one is present, or the file location otherwise.Given that you're seeing this violation, it means none of these mechanisms was available.
IRIs in an ontology cannot be relative, they must be absolute - otherwise the assertions will change according to where the file is parsed from. This is a violation of the OWL specs, and is what is being highlighted here.
I've tried the ontology in the validator and tried the code with OWLAPI 4 validation and directly in Protege. So, the following came up:
the online validator you used is manually adding an ontology IRI, because the ontology itself does not have a declaration (Protege gives the following warning on loading:
INFO 08:02:37 Loading ontology from http://purl.org/vocab/frbr/frbr-core-20050810.rdf INFO 08:02:41 Notice: root element does not have an xml:base. Relative IRIs will be resolved against http://purl.org/vocab/frbr/frbr-core-20050810.rdf
loading from the URL of the page you ave does not work - HTML is downloaded instead. I'm not sure if this is a content negotiation issue or if the ontology was only meant to be accessible via the link inside the page. Using this link works:
There are other OWL 2 DL violations, but they shouldn't stop you from using the ontology.
QUESTION
From the following file:
...ANSWER
Answered 2017-Feb-11 at 17:33The instruction:
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Install rdf-file
You can use rdf-file like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the rdf-file component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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