Package nltk :: Package sem :: Module chat80 :: Class Concept

type Concept

object --+
         |
        Concept

A Concept class, loosely based on SKOS (http://www.w3.org/TR/swbp-skos-core-guide/).

Instance Methods

[hide private]

__init__(self, prefLabel, arity, altLabels=[], closures=[], extension=set([])) source code

__str__(self)

source code

__repr__(self)

source code

set

augment(self, data)
Add more data to the Concept's extension set. source code

_make_graph(self, s)
Convert a set of pairs into an adjacency linked list encoding of a graph.

source code

_transclose(self, g)
Compute the transitive closure of a graph represented as a linked list.

source code

_make_pairs(self, g)
Convert an adjacency linked list back into a set of pairs.

source code

close(self)
Close a binary relation in the Concept's extension set. source code

Method Details

[hide private]

init(self, prefLabel, arity, altLabels=`[]`, closures=`[]`, extension=`set([])`)
(Constructor)

source code

Parameters:

prefLabel (str) - the preferred label for the concept
arity (int) - the arity of the concept
altLabels (list) - other (related) labels
closures (list) - closure properties of the extension (list items can be symmetric, reflexive, transitive)
extension (set) - the extensional value of the concept

Overrides: object.__init__

str(self)
(Informal representation operator)

source code

Overrides: object.__str__: (inherited documentation)

repr(self)
(Representation operator)

source code

Overrides: object.__repr__: (inherited documentation)

augment(self, data)

source code

Add more data to the Concept's extension set.

Parameters:

data (string or pair of strings) - a new semantic value

Returns: set

close(self)

source code

Close a binary relation in the Concept's extension set.

Returns:: a new extension for the Concept in which the relation is closed under a given property

type Concept

__init__(self, prefLabel, arity, altLabels=[], closures=[], extension=set([])) (Constructor)

__str__(self) (Informal representation operator)

__repr__(self) (Representation operator)

augment(self, data)

close(self)

init(self, prefLabel, arity, altLabels=`[]`, closures=`[]`, extension=`set([])`)
(Constructor)

str(self)
(Informal representation operator)

repr(self)
(Representation operator)