booleano 1.0a1dev-20090523

Evaluation of boolean expressions in natural languages

TODO: Complete this document.

Supported grammar

The following Backus-Naur Form (BNF) defines the supported grammar:

<boolean-expression> ::= <operations>

<operation> ::=

<flat-operation> ::= <or-operation>*
<or-operation> ::= <and-operation> ["OR" <and-operation>]
<and-operation> ::= <basic-operation> ["AND" <basic-operation>]

<basic-operation> ::= ["NOT"] <atom-operand>
<atom-operand> ::= <number> | <quoted-string> | <variable>

<number> ::= <digit>+ [<decimal-separator> <digit>+]
<digit> ::= "0".."9"
<decimal-separator> ::= "."                                   -- replaceable
<variable> ::= <word> ["." <word>]

Where the following constants can be translated:

• "NOT".

• ".".