rdf-utils-dataset
v2.0.1
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RDFJS Dataset utils
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rdf-utils-dataset
Utils for RDF/JS Datasets.
Functions
resource(dataset, subject)
Returns a subgraph of dataset
. It's created by traversing dataset
starting at subject. Traversing stops at quads with a NamedNode
subject.
Example
Say you have the following triples in a dataset:
@prefix ex:<http://example.org/>.
ex:Alice
ex:address [ ex:street "Wonderland Street" ;
ex:number "22" ] ;
ex:name "Alice" .
ex:Bob
ex:name "Bob" .
Then, the resource function
import { resource } from 'rdf-utils-dataset'
const dataset = // Load the dataset somehow
const result = resource(dataset, rdf.namedNode('http://example.org/Alice'))
console.log(result.toCanonical())
yields:
<http://example.org/Alice> <http://example.org/address> _:c14n0 .
<http://example.org/Alice> <http://example.org/name> "Alice" .
_:c14n0 <http://example.org/number> "22" .
_:c14n0 <http://example.org/street> "WonderLand Street" .
(Note that the description follows blank nodes)
resourcesToGraph (dataset, options)
Searches for all NamedNode
subjects in dataset
and creates subgraphs using resource()
. The graph of the quads are set to the start subject.
Example
Say you have the following triples in a dataset:
@prefix ex:<http://example.org/>.
ex:Alice
ex:address [ ex:street "Wonderland Street" ;
ex:number "22" ] ;
ex:name "Alice" .
ex:Bob
ex:name "Bob" .
Then, the resourcesToGraph function
import { resourcesToGraph } from 'rdf-utils-dataset'
const dataset = // Load the dataset somehow
const result = resourcesToGraph(dataset)
console.log(result.toCanonical())
yields:
<http://example.org/Alice> <http://example.org/address> _:c14n0 <http://example.org/Alice> .
<http://example.org/Alice> <http://example.org/name> "Alice" <http://example.org/Alice> .
<http://example.org/Bob> <http://example.org/name> "Bob" <http://example.org/Bob> .
_:c14n0 <http://example.org/number> "22" <http://example.org/Alice> .
_:c14n0 <http://example.org/street> "WonderLand Street" <http://example.org/Alice> .
Loading the functions
Each util function can be loaded as property from the main module or by loading only the file with the same name. Loading the individual files can decrease the file size after packaging the JavaScript code for the browser.
Usage
Loading the function from the main module:
import { resource } from 'rdf-utils-dataset'
Loading the function from the file with the function name:
import resource from 'rdf-utils-dataset/resource.js'