Searching

This is an internal draft
In 0.8, Betula will support searching with a special query language. This document explains its syntax.

Unary operators

#
title:
protocol:
url:
site:
desc:

Rules (op is used instead of all the operators):

op A
op (A B)   -> op A op B
op (A | B) -> op A | op B
op (A - B) -> op A - op B
op1 op2 A  -> op1 A op2 A
op - A     -> - op A
op | A     -> (ignored)
op         -> (ignored)

Binary operators

|
-
(implicit and)

Rules (every operator is replaced with o, they all have the same precedence):

A
A o B
A o B o C -> (A o B) o C
A o       -> (ignored)
o A       -> (ignored)

So, this query dog | bird cat is (dog OR bird) AND cat.