import { createLens } from "https://deno.land/x/ldkit/mod.ts";
Creates an instance of Lens that lets you query and update RDF data via data schema using TypeScript native data types.
In order to create a Lens instance, you need to provide a data schema that describes the data model which serves to translate data between Linked Data and TypeScript native types (see Schema for details).
You can also pass a set of options for LDkit and a query engine that specify the data source, preferred language, etc. (see Options for details).
Examples
Example 1
Example 1
import { createLens, type Options } from "ldkit";
import { dbo, rdfs, xsd } from "ldkit/namespaces";
// Create options for query engine
const options: Options = {
sources: ["https://dbpedia.org/sparql"], // SPARQL endpoint
language: "en", // Preferred language
};
// Create a schema
const PersonSchema = {
"@type": dbo.Person,
name: rdfs.label,
abstract: dbo.abstract,
birthDate: {
"@id": dbo.birthDate,
"@type": xsd.date,
},
} as const;
// Create a resource using the data schema and options above
const Persons = createLens(PersonSchema, options);
// List some persons
const persons = await Persons.find({ take: 10 });
for (const person of persons) {
console.log(person.name); // string
console.log(person.birthDate); // Date
}
// Get a particular person identified by IRI
const ada = await Persons.findByIri("http://dbpedia.org/resource/Ada_Lovelace");
console.log(ada?.name); // string "Ada Lovelace"
console.log(ada?.birthDate); // Date object of 1815-12-10
Type Parameters
T extends Schema