about.ttl

@prefix ldh:    <https://w3id.org/atomgraph/linkeddatahub#> .
@prefix rdf:    <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix dh:     <https://www.w3.org/ns/ldt/document-hierarchy#> .
@prefix dct:    <http://purl.org/dc/terms/> .
  
<> a dh:Item ;
    dct:title "About LinkedDataHub" ;
    dct:description "An RDF-native Knowledge Graph application platform" ;
    rdf:_1 <#content> .

<#content> a ldh:XHTML ;
    rdf:value """<div xmlns="http://www.w3.org/1999/xhtml">
    <p class="lead">LinkedDataHub is a Knowledge Graph application platform by
        <a href="https://atomgraph.com" target="_blank">AtomGraph</a> that fully exploits the federated features of RDF and SPARQL.
        It can also be used as an RDF-native content management platform.</p>
    <p>LinkedDataHub is an open source project that has its roots as a Linked Data publishing framework. However, since the 3.x release we have focused on Linked Data consumption, as we consider
            publishing a solved problem but continue to see a shortage of user-friendly consumption tools.</p>
    <div>
        <h2 id="platform">Low code application platform</h2>
        <p>LinkedDataHub is also a low code RDF Knowledge Graph application platform. It offers comprehensive development and management features:</p>
        <ul>
            <li>rich <a href="../reference/stylesheets/" target="_blank">UI component library</a> that can be customized without writing program code</li>
            <li>SPARQL-based templates for instance creation and editing forms (<a href="../reference/administration/ontologies/#constructors" target="_blank">constructors</a>)</li>
            <li>SPIN and SHACL <a href="../reference/administration/ontologies/#constraints" target="_blank">constraints</a> for validation of incoming data</li>
            <li>authentication using WebID and OpenID Connect</li>
            <li><a href="../reference/administration/acl/" target="_blank">access control</a> using WAC authorizations</li>
        </ul>
        <p class="lead">Checkout the user guide on <a href="../user-guide/build-apps/">application building</a>.</p>
    </div>
    <div>
        <h2 id="kms">Federated knowledge management and collaboration system</h2>
        <p class="text-center">
            <iframe allowfullscreen="allowfullscreen" frameborder="0" height="315" src="https://www.youtube.com/embed/LaOouEYhp_c" width="560"></iframe>
        </p>
        <p>As an RDF-native CMS, LinkedDataHub provides a number of features for end-users:</p>
        <ul>
            <li><a href="../user-guide/create-data/create-content/" target="_blank">creating structured content</a> from Linked Data and SPARQL resources (<strong>new in 3.x</strong>)</li>
            <li><a href="../user-guide/create-data/create-documents/" target="_blank">creating RDF documents (graphs)</a></li>
            <li><a href="../user-guide/browse-data/" target="_blank">browsing Linked Data</a></li>
            <li><a href="../user-guide/add-data/" target="_blank">forking RDF resources</a> to the local dataspace (<strong>new in 3.x</strong>)</li>
            <li><a href="../user-guide/search-data/" target="_blank">searching</a> and <a href="../user-guide/query-data/" target="_blank">querying</a> SPARQL endpoints</li>
            <li>creating collections from SPARQL queries</li>
            <li>editing remote and local RDF documents</li>
            <li><a href="../user-guide/import-data/import-csv-data/" target="_blank">importing CSV data</a> by mapping it to RDF using SPARQL</li>
            <li>visualizing query results as graphs, charts etc.</li>
        </ul>
    </div>
    <div>
        <h2 id="architecture">Architecture</h2>
        <p>Architecturally LinkedDataHub is a read-write RDF Graph Store combined with a rich Linked Data/SPARQL client. LinkedDataHub does not persist RDF data itself but rather serves it from, and stores it in,
            a backing triplestore, which by default is the <a href="https://jena.apache.org/documentation/fuseki2/" target="_blank">Apache Jena Fuseki</a>.</p>
        <p>Every document in LinkedDataHub's dataspace is also a named graph in the Graph Store and has both RDF and HTML representations. The client is implemented using XSLT 3.0, a standard, declarative data transformation language. It can connect to any Linked Data resource or SPARQL 1.1 endpoint.</p>
        <p>Since version 3.x LinkedDataHub does not use the <a href="https://atomgraph.github.io/Linked-Data-Templates/" target="_blank">Linked Data Templates</a> anymore. However they can still be used to publish Linked Data from SPARQL endpoints
            using <a href="https://github.com/AtomGraph/Processor" target="_blank">Processor</a>.</p>
        <p>You can find the changelog <a href="https://github.com/AtomGraph/LinkedDataHub/blob/master/CHANGELOG.md" target="_blank">here</a>.</p>
    </div>
</div>"""^^rdf:XMLLiteral .