Un repost dal blog di Gary Gregory, che contiene una spiegazione breve e chiara sui concetti di Trunk e HEAD (always ship Trunk!) in CVS e SVN:
This aim of this note is to provide the shortest and simplest explanation of the concepts of trunk and HEAD in a Version Control System like CVS and Subversion (SVN.) Like in botany, trunk is a tree’s central superstructure. All branches come out of the trunk: Main development is performed in the trunk. Releases are branched for bug fixes and maintenance releases. In the next diagram, the tip of the arrows for trunk and a branches are HEADs. Each branch and trunk have a HEAD.