This is a tree of files and directories which is used in Subversion python tests. It is called so because of files of this tree which are called after names of different letters of the Greek alphabet. This tree can be represented as follows:
* Repository Root
* ____|____
* / \
* / \
* / \
* A iota
* _______________________//|\
* / ______________/ | \_____________
* mu / | \
* / | \
* B C D
* _____/|\_____ _____________/|\
* / | \ / | \
* / | \ / / \
* lambda | F / / \
* E gamma / \
* / \ / \
* / \ ________/ \________
* alpha beta / \
* / \
* / \
* G H
* ________/|\_______ _______/|\______
* / | \ / | \
* / | \ / | \
* / | \ / | \
* pi rho tau chi psi omega
*