Linked Data browser¶

LinkedDataHub has a built-in Linked Data browser which is accessed through the navigation bar. Enter a http:// or https:// URL and press Enter or click the search button. Try, for example:

• https://unesco-thesaurus.demo.linkeddatahub.com/concepts/concept3683/ — a concept in another LinkedDataHub dataspace (the one the Northwind Beverages category maps to)
• https://dbpedia.org/resource/Copenhagen — an arbitrary Linked Data resource on the open web

The browser supports all standard RDF formats as well as JSON-LD embedded in an HTML page's <script> elements, which is often used to publish schema.org metadata.

When the data loads successfully, you can navigate it the same way as your local documents, switch between different layout modes etc. You can also add the data into your dataspace.

If an RDF document cannot be read from the supplied URL, an error message will be shown.

Document tree¶

The document tree in the left sidebar gives a quick overview of the dataspace's document hierarchy; the user interface reference describes the widget.

Class-based navigation¶

In addition to navigating by document hierarchy, you can navigate by class: the Classes list in the left sidebar shows the classes (rdf:type values) that occur in your data; the user interface reference describes the widget.

Using class-based navigation¶

1. Open the left sidebar — slide the mouse to the left edge of the screen
2. Find the Classes list
3. Click on any class to open a dialog listing all instances of that class in your dataspace

When to use class-based navigation¶

Class-based navigation is most useful when:

Finding all instances of a type

Quickly locate all resources of a particular class, regardless of where they are stored in the document hierarchy

Exploring domain concepts

Browse your data organized by business concepts (e.g. all Customers, all Orders) rather than by container structure

Cross-container queries

View instances that span multiple containers in a single unified view

The list is derived from the data itself and respects your access control settings.

Text search¶

You can look up resources by typing a phrase (a few letters are enough) into the search box at the top of the left sidebar.

A dropdown list will appear if there are any matches. Use ↑/↓ or click to select a result, and you will be redirected to its document.

The matching is done by looking for substrings using SPARQL regex() in common literal properties such as dct:title, rdfs:label, foaf:name etc. — equivalent to a query of this shape:

PREFIX dct:  <http://purl.org/dc/terms/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX skos: <http://www.w3.org/2004/02/skos/core#>

SELECT DISTINCT ?resource
WHERE {
    GRAPH ?g {
        ?resource ?labelProperty ?label .
        VALUES ?labelProperty { dct:title rdfs:label foaf:name skos:prefLabel }
        FILTER regex(str(?label), "cha", "i")   # on Northwind, matches "Chai", "Chang", "Chartreuse verte"…
    }
}

The same widget is used for autocomplete inputs in create and edit forms.

Structured search¶

You can use SPARQL to query data from the dataspace's SPARQL service.

Backlinks¶

Backlinks open in a popover anchored to each block's links button. They display a list of resources which have properties with the block's resource as the object.