Should I delimit account code levels with, e.g. a dot?

[cdchapman]

Delimiting codes could allow more flexibility in the chart structure (because a level would not be limited to 10 accounts). Currently each number of each code represents a level in the structure of the accounts. This is how I have seen account codes modeled in other Tryton modules, but I don't know whether that is a conscious design decision or whether those codes are provided by a national GAAP.

Example

13110 Direct labor -> 1.3.1.1.0 Direct labor

101394 Petty cash—Ukrainian hryvnia -> 1.0.1.3.13 Petty cash—Ukrainian hryvnia