# Nepomuk Annotation Ontology (NAO): Tags, ratings and other common annotations to all classes

Authors:
- - Siegfried Handschuh, DERI/NUIG, <siegfried.handschuh@deri.org>
  - Ludger van Elst, DFKI, <elst@dfki.uni-kl.de>
  - Michael Sintek, DFKI, <michael.sintek@dfki.de>
  - Simon Scerri, DERI/NUIG, <simon.scerri@deri.org>
Editors:
- - Tracker developers (translation into turtle)
  - Simon Scerri, DERI/NUIG, <simon.scerri@deri.org>
Contributors:
- - Antoni Mylka, DFKI, <antoni.mylka@dfki.de>
  - Julien Gaugaz, L3S, <gaugaz@l3s.de>
  - Knud Möller, DERI/NUIG, <knud.moeller@deri.org>
  - Sebastian Trüg, EDGE-IT, <strueg@mandriva.com>
  - Max Völkel, FZI, <voelkel@fzi.de>
  - Leo Sauermann, DFKI, <leo.sauermann@dfki.de>
Upstream:

- Upstream version

ChangeLog:

- Tracker changes

Copyright:

- © 2007 NEPOMUK Consortium®. This work is made available under the terms of NEPOMUK software license

## NAO Ontology Classes

### nao:Property

Dont use this without asking first your ontology doctor

`Superclasses` :

  rdfs:Resource,

`Subclasses` :

  --

`In domain of` :

  nao:propertyValue, nao:propertyName,

`In range of` :

  nao:hasProperty,

### nao:Tag

`Superclasses` :

  rdfs:Resource,

`Subclasses` :

  --

`In domain of` :

  nao:description, nao:prefLabel,

`In range of` :

  --

`Predefined instances` :

  nao:predefined-tag-favorite,

#### Note:

This class notifies about changes

## NAO Ontology Properties

### nao:numericRating

`Type` :

  --

`Domain` :

  rdfs:Resource,

`Range` :

  xsd:double,

`Superproperties` :

  --

`Subproperties` :

  --

`Cardinality` :

  1

### nao:identifier

`Type` :

  --

`Domain` :

  rdfs:Resource,

`Range` :

  xsd:string,

`Superproperties` :

  --

`Subproperties` :

  --

`Cardinality` :

  1

### nao:isRelated

This property defines a symmetric relation between any two resources. In order for this property to be used legally, the relationship must be symmetric.

`Type` :

  --

`Domain` :

  rdfs:Resource,

`Range` :

  rdfs:Resource,

`Superproperties` :

  --

`Subproperties` :

  --

### nao:deprecated

If this property is assigned, the subject class, property, or resource, is deprecated and should not be used in production systems any longer. It may be removed without further notice.

`Type` :

  --

`Domain` :

  rdfs:Resource,

`Range` :

  xsd:boolean,

`Superproperties` :

  --

`Subproperties` :

  --

### nao:propertyName

`Type` :

  --

`Domain` :

  nao:Property,

`Range` :

  xsd:string,

`Superproperties` :

  --

`Subproperties` :

  --

`Cardinality` :

  1

### nao:prefLabel

`Type` :

  --

`Domain` :

  nao:Tag,

`Range` :

  xsd:string,

`Superproperties` :

  --

`Subproperties` :

  --

`Cardinality` :

  1

`Text indexed` :

  This property is indexed, so it can provide results on text search

### nao:hasTag

`Type` :

  --

`Domain` :

  rdfs:Resource,

`Range` :

  rdfs:Resource,

`Superproperties` :

  --

`Subproperties` :

  --

### nao:description

In the context of the social semantic desktop the textual annotation provided via rdfs:comment is meant for technical users, the textual annotation here is aimed at average users and is meant to be used to define custom descriptions of resources on the desktop

`Type` :

  --

`Domain` :

  nao:Tag,

`Range` :

  xsd:string,

`Superproperties` :

  rdfs:comment,

`Subproperties` :

  --

`Cardinality` :

  1

`Text indexed` :

  This property is indexed, so it can provide results on text search

### nao:hasProperty

`Type` :

  --

`Domain` :

  nie:InformationElement,

`Range` :

  nao:Property,

`Superproperties` :

  --

`Subproperties` :

  --

### nao:propertyValue

`Type` :

  --

`Domain` :

  nao:Property,

`Range` :

  xsd:string,

`Superproperties` :

  --

`Subproperties` :

  --

`Cardinality` :

  1

### nao:lastModified

last modification date

`Type` :

  --

`Domain` :

  rdfs:Resource,

`Range` :

  xsd:dateTime,

`Superproperties` :

  dc:date,

`Subproperties` :

  --

`Cardinality` :

  1