Nepomuk.Types.Property

KDE 4.9 PyKDE API Reference

- KDE's Python API

# Property Class Reference

`from PyKDE4.nepomuk import *`

Inherits: Nepomuk.Types.Entity
Namespace: Nepomuk.Types

## Detailed Description

\class Property property.h Nepomuk/Types/Property

A property is a resource of type rdf:Property which relates a domain with a range. The latter one can be a Literal or a Class.

Property instances are explicitly shared. Two instances created with the same uri reference the same data.

While Resource objects can be changed Property instances are considered to be static and never changed during their lifetime.

Author:
  Sebastian Trueg <trueg@kde.org>

## Methods
| __init__ (self)
| __init__ (self, QUrl uri)
| __init__ (self, Nepomuk.Types.Property a0)
int | cardinality (self)
Nepomuk.Types.Class | domain (self)
Nepomuk.Types.Property | inverseProperty (self)
bool | isParentOf (self, Nepomuk.Types.Property other)
bool | isSubPropertyOf (self, Nepomuk.Types.Property other)
Nepomuk.Types.Literal | literalRangeType (self)
int | maxCardinality (self)
int | minCardinality (self)
[Nepomuk.Types.Property] | parentProperties (self)
Nepomuk.Types.Class | range (self)
[Nepomuk.Types.Property] | subProperties (self)

## Method Documentation

__init__ | ( |  | self ) |

Default copy constructor

__init__ | ( | self, |
|  | QUrl | uri
| ) |  |  |

Create the property referred to by uri. The result is either a valid property which could be loaded from the Nepomuk store or a simple property which only contains the uri.

Be aware that the data is only loaded once read.

Subsequent calls result in a simple hash lookup of cached data.

__init__ | ( | self, |
|  | Nepomuk.Types.Property | a0
| ) |  |  |

Default copy constructor

int cardinality | ( |  | self ) |

The cardinality of this property as specified by nrl:cardinality.

Returns:
  the cardinality of the property or -1 if none was set.

Const version

Since:
  4.4

Nepomuk.Types.Class domain | ( |  | self ) |

The domain of the property.

Const version

Since:
  4.4

Nepomuk.Types.Property inverseProperty | ( |  | self ) |

The inverse property (nrl:inverseProperty).

Returns:
  A Property instance representing the inverse property of this one or 0 if none was specified in the ontology.

Const version

Since:
  4.4

bool isParentOf | ( | self, |
|  | Nepomuk.Types.Property | other
| ) |  |  |

Check if a property inherits this property. This is a recursive method which does not only check direct child propertyes.

Returns:
  true if other is derived from this property, false otherwise.

Const version

Since:
  4.4

bool isSubPropertyOf | ( | self, |
|  | Nepomuk.Types.Property | other
| ) |  |  |

Check if this property is derived from another property. This is a recursive method which does not only check direct child propertyes.

Returns:
  true if this property is derived from other, false otherwise.

Const version

Since:
  4.4

Nepomuk.Types.Literal literalRangeType | ( |  | self ) |

If the rage of this property is a literal (i.e. range returns an invalid Class) this method provides the literal type.

Returns:
  the literal type of this property or an empty, invalid Literal if the range is a Class.

\sa range

Const version

Since:
  4.4

int maxCardinality | ( |  | self ) |

The maximum cardinality of this property as specified by nrl:maxCardinality.

Returns:
  the maximum cardinality of the property or -1 if none was set.

Const version

Since:
  4.4

int minCardinality | ( |  | self ) |

The minimum cardinality of this property as specified by nrl:minCardinality.

Returns:
  the minimum cardinality of the property or -1 if none was set.

Const version

Since:
  4.4

[Nepomuk.Types.Property] parentProperties | ( |  | self ) |

Each property can have multiple parent properties.

Returns:
  A list of all parent properties of this property. If the list is emppty it means that the property has no direct parents, i.e. it is derived from rdf:Resource.

Const version

Since:
  4.4

Nepomuk.Types.Class range | ( |  | self ) |

The range of the property.

Returns:
  The range of the property or an invalid Class in case the range of this poperty is a literal.

\sa literalRange

Const version

Since:
  4.4

[Nepomuk.Types.Property] subProperties | ( |  | self ) |

Returns:
  A list of all properties that have this property as a parent. Be aware that this list can never be final since other ontologies that have not been loaded yet may contain properties that are derived from this property.

Const version

Since:
  4.4