A long introduction to transfer rules

Writing transfer rules seems to be tricky. People generally understand the basic concepts, but they struggle with the formalism. We think the formalism isn't that bad. And compared to many other formalisms, it's fairly straightforward.

Some formalities

Before starting, it is important to give some idea of what we can't do, before explaining what we can. If you come at rule-learning expecting something else, then it's likely to be confusing.

• There are no recursive rules. Rules match fixed-length patterns. There is no optionality at the level of words. There is no way of saying one-or-more, it's just one.

Apertium 1

Otisla si tiho i bez pozdrava

Apertium 3

Resorni je ministar navlačio ljude, kaže sejte biljku zelenu i čudo će da bude