# RDFS/OWL Visualization Language (RVL)
RVL is a declarative language that allows to specify a mapping from RDF(S)/OWL concepts to visual means that are defined in the <a href="http://purl.org/viso/">Visualisation Ontology</a> (VISO).

## DBpedia Archivo Ontology Snapshot

| Attribute |  Value |
| - | - |
| Ontology URI | <http://purl.org/rvl/>
| Snapshot OWL Version IRI | <None>
| Snapshot Time | 2020-06-10 20:57:54

The [DBpedia Archivo Databus agent](https://databus.dbpedia.org/ontologies) generates only basic, static documentation for the archived snapshots of the ontologies. More, augmented and dynamic information for this ontology is rendered on and retrievable via [DBpedia Archivo Frontend](http://archivo.dbpedia.org/info?o=http://purl.org/rvl/).

## Ontology Metadata

DBpedia Archivo extracts metadata from the ontology for well known properties (e.g. dct:description). This subsection shows the content of every property individually using a separate heading.

### dct:description

RVL is a declarative language that allows to specify a mapping from RDF(S)/OWL concepts to visual means that are defined in the <a href="http://purl.org/viso/">Visualisation Ontology</a> (VISO). The syntax is based on RDFS, while the semantics are given by means of SPIN rules.  

RVL was developed in the SemVis project by Jan Polowinski. More on RVL can be found in the <a href="https://github.com/semvis/rvl/wiki" title="The RVL-Wiki on GitHub ...">Wiki</a>.

<h3>Overview of Mapping Classes in RVL</h3>

<img src="http://www-st.inf.tu-dresden.de/semvis/ontologies/rvl/img/rvl_class_diagram.png">

<h3>Overview of Datatypes used in RVL</h3>
<b>MissingSourceValueHandlingType:</b> Hide, Ignore, Missing (default), Neutral, Average
<b>MissingValueMappingHandlingType:</b> Calculate (default), Hide, Neutral, Ignore, No mapping, Average
<b>NeutralValueHandlingType:</b> Average, Style
<b>OutOfBoundHandlingType:</b> Cut (default), Clamp
<b>ScaleTransformationType:</b> Linear (default), Logarithmic

<!--<img src="http://www-st.inf.tu-dresden.de/semvis/ontologies/rvl/img/datatypes_rvl.png"/>-->

 + ## All DBpedia Archivo ontologies from purl.org domain

Each artifact in this group deals as the archive for snapshots of one ontology of the [DBpedia Archivo](https://databus.dbpedia.org/ontologies) -  A Web-Scale Interface for Ontology Archiving under Consumer-oriented Aspects. Find out more at [http://archivo.dbpedia.org](http://archivo.dbpedia.org). The description for the individual files in the artifact can be found [here](http://dev.dbpedia.org/DBpedia_Archvio#files).