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<h1>Smart Applications REFerence Ontology, and extensions</h1>
<p><strong>Official ETSI portal for SAREF</strong><br>This portal contains pointers to the SAREF ontologies and SAREF-related work items</p>
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What is SAREF?
</h2>
<p><strong>The Smart Applications REFerence (SAREF)</strong> ontology is a shared model of consensus that facilitates the matching of existing assets in the smart applications domain. </p>
<p><em>SAREF provides building blocks that allow separation and recombination of different parts of the ontology depending on specific needs.</em></p>
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Why SAREF?
</h2>
<p><strong>SAREF</strong> explicitly specifies recurring core concepts in the smart applications domain, the main relationships between these concepts, and axioms to constrain the usage of these concepts and relationships. SAREF has been
created based on the following fundamental principles: <br>
<ul style="list-style-type:disc;">
<li><strong>Reuse and alignment</strong> of concepts and relationships that are defined in existing assets</li>
<li><strong>Modularity</strong> to allow separation and recombination of different parts of the ontology depending on specific needs</li>
<li><strong>Extensibility</strong> to allow further growth of the ontology</li>
<li><strong>Maintainability</strong> to facilitate the process of identifying and correcting defects, accommodate new
requirements, and cope with changes in (parts of) <strong>SAREF</strong></li>
</ul>
</p>
<p><a href="#Figure_1">Figure 1</a> shows an overview of the main classes of SAREF and their relationships.<p>
<figure>
<img src="static/images/saref.png" alt="SAREF Overview"/>
<figcaption id="Figure_1">Figure 1: Overview of the SAREF ontology</figcaption>
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<p><em>This <a href="https://saref.etsi.org/">SAREF public portal</a>, the <a href="https://saref.etsi.org/sources/">SAREF sources</a> with continuous integration and deployment, the <a href="https://saref.etsi.org/sources/saref-pipeline/">SAREF Pipeline</a> software, and ETSI Technical Specification <a href="https://www.etsi.org/deliver/etsi_ts/103600_103699/103673/01.01.01_60/ts_103673v010101p.pdf">TS 103 673 v1.1.1 "SAREF Development Framework and Workflow, Streamlining the Development of SAREF and its Extensions"</a>, have been developed in the context of the <a href="https://portal.etsi.org/STF/STFs/STF-HomePages/STF578">ETSI STF 578</a>, which followed the <a href="https://portal.etsi.org/STF/STFs/STF-HomePages/STF556">ETSI STF 556</a><em><p>
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