Tracker – 3.0: Nepomuk Resource Language (NRL)
Description: Reference for Tracker-3.0: Nepomuk Resource Language (NRL)

Properties describing the ontologies.

    @prefix nrl: <http://tracker.api.gnome.org/ontology/v3/nrl#>

The following classes are defined:

InverseFunctionalProperty, Namespace, Ontology

# Classes

## InverseFunctionalProperty

A marker class to identify inverse functional properties

## Namespace

Specifies a namespace. This is a Tracker extension

#### Class hierarchy

#### Properties

Name | Type | Notes | Description
--- | --- | --- | ---
prefix | string |  | This is a Tracker extension

#### Predefined instances

nrl:Namespace has the following predefined instances:

- dc:
- nrl:
- fts:
- tracker:
- rdfs:
- rdf:
- xsd:

## Ontology

An ontology

#### Class hierarchy

#### Properties

Name | Type | Notes | Description
--- | --- | --- | ---
lastModified | dateTime |  | last modification date. This is a Tracker extension

#### Predefined instances

nrl:Ontology has the following predefined instances:

- dc:
- nrl:
- rdf:
- xsd:

# Additional properties for rdf:Property

Properties this ontology defines which can describe rdf:Property resources.

Name | Type | Notes | Description
--- | --- | --- | ---
fulltextIndexed | boolean |  | Whether the property is full-text indexed. This is a Tracker extension
indexed | boolean |  | Whether a property has an index. This is a Tracker extension
maxCardinality | integer |  | Specifies a maximum value cardinality for a specific property
propertySpecification | string |  | Link to upstream specification for an ontology property. This is a Tracker extension
secondaryIndex | Property |  | Whether subject and object properties share an index. This is a Tracker extension
weight | integer |  | Property weight on full-text search relevance. This is a Tracker extension

# Additional properties for rdfs:Class

Properties this ontology defines which can describe rdfs:Class resources.

Name | Type | Notes | Description
--- | --- | --- | ---
classSpecification | string |  | Link to upstream specification for an ontology class. This is a Tracker extension
domainIndex | Property |  | Property is a domain index for the subject class. This is a Tracker extension
notify | boolean |  | Whether resources of this class emits notifications on changes. This is a Tracker extension

# Additional properties for rdfs:Resource

Properties this ontology defines which can describe rdfs:Resource resources.

Name | Type | Notes | Description
--- | --- | --- | ---
added | dateTime |  | Time of insertion of the resource. This is a Tracker extension
deprecated | boolean |  | 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. This property is a Tracker extension
modified | integer |  | Modification sequence number. This is a Tracker extension

# Credits and Copyright

Authors:

- Nepomuk People

Editors:

- Tracker developers (translation into turtle)

Upstream: Not available

ChangeLog: Tracker changes