sparqling

Point and click SPARQL query builder based on Grapholscape. Build SPARQL queries interacting directly with the ontology graphical specification.

Standalone

Check standalone releases in order to get the ready to use application: https://github.com/obdasystems/sparqling-standalone

Installation

Sparqling works on top of Grapholscape that is a peer dependecy, hence you need to install it before proceding.
Once Grapholscape is ready and working you can proceed importing sparqling.

HTML Environment

If you are using a HTML Environment (without a building system) you can:

• link ./dist/sparqling.min.js in a <script> tag in your html file:

<script src="./sparqling.min.js" type="text/javascript" ></script>

• import sparqling as a ES6 module:

<script type="module">
  import * as Sparqling from "./sparqling.esm.min.js";
</script>

NPM

If you want to install it via npm: npm install sparqling.

Initialisation

Sparqling offers two intialising functions:

• sparqlingStandalone: for the standalone version
• sparqling: meant to be used within other OBDA Systems' products.

You need to pass it the grapholscape instance and the Graphol ontology file which can be a string or a Blob. The initialising function will return the core object, check the API.

import * as Sparqling from 'sparqling'
// or import * as Sparqling from './sparqling.esm.min.js'
// or <script ...>

const grapholscape = ... // init grapholscape

const sparqlingCore = Sparqling.sparqlingStandalone(grapholscape, grapholFile)

API

The Sparqling core object expose the following API:

• function start(): void: initialise the UI components and activate sparqling's engine.
• property onStart: () => void: onStart callback to perform actions every time sparqling is started.

  Example:

  sparqlingCore.onStart = function() {
    console.log('Sparqling has been started')
  }

• function stop(): void: stop sparqling's engine and hide UI components.
• property onStop: () => void: onStop callback to perform actions every time sparqling is stopped.

  Example:

  sparqlingCore.onStop = function() {
    console.log('Sparqling has been stopped')
  }

• function getQueryBody(): QueryGraph: returns the actual QueryGraph
• property onQueryRun: (sparqlQuery: string) => void: onQueryRun callback to perform actions every time the user click on the run query button.

  Example:

  sparqlingCore.onQueryRun = function(sparqlQuery) {
    console.log(`Please run this query: ${sparqlQuery}`)
  }

Repository npm targets

• start: build for development/debugging and serve the application at localhost:8000 watching for changes
• watch: watch for changes in development environment
• build: build for production
• serve: serve the ./public folder at localhost:8000
• apigen: generate api code from swagger
• inject-grapholscape: copy ./node_modules/grapholscape/dist/grapholscape.min.js build into ./public/js for the web-app to work
• clean: clean generated sparqling files in ./dist and ./public/js
• version: build and tag a new release version
• snapshot: build a snapshot prerelease version to be published with tag snapshot for testing

Release a new version

1. Be sure to have a clean working tree (i.e. commit/stash your changes).
2. Use standard npm version command to tag a new version: npm version [new-version].
   this will generate a new git tag, update package.json and perform the builds.
3. Then review the generated builds and test the app using: npm run serve.
4. Push the new release: git push && git push --tags"
5. Publish to npm

Release a snapshot test version

1. Use npm run snapshot
2. Publish using snapshot tag npm publish --tag snapshot

To install latest snapshot version use npm i sparqling@snapshot

Swagger

https://app.swaggerhub.com/apis/OBDASystems/swagger-sparqling_ws/1.0.0

In order to generate client/server model and api use swagger.editor.io