# Keywords¶

This section allows for the specification of properties satisfied by a Bell expression. Keywords can consist of alphanumerical characters plus the - and underscore _. They are specified as a sequence of strings:

keywords: ['minimal', 'not-io-lifted']


The following keywords are reserved, and can be computed automatically using the Faacets command-line tool:

minimal
The Bell expression is the minimal lexicographic representative of its equivalence class under relabelings.
not-minimal
The Bell expression is known not to be minimal.
io-lifted
The Bell expression is known to be a lifting of settings and/or outcomes.
not-io-lifted
The Bell expression is known not to be a lifting of settings and/or outcomes.
composite
The Bell expression is known to be a composition of simpler Bell expressions, in the sense of the Section of our paper.
not-composite
The Bell expression is known not to be composite.
self-opposite
The Bell expression is equivalent under relabelings to its negative value.
canonical
The Bell expression is known to be minimal, not-io-lifted, not-composite. In addition, the scenario itself is ordered canonically, and the bound has been extracted from the coefficients, who themselves are written down using integers with GCD = 1.

Todo

Add link to our paper, to the Faacets command line tool documentation