dev: development branch of an OXID eShop series before it is officially released as stable.
maintenance: maintenance branch of an OXID eShop series after it’s release. Will be supported with all bug fixes.
legacy: legacy branch of an an OXID eShop series after the next series is released. Will be supported with most serious bug fixes.
Unified series numbers for editions
A while ago, starting with OXID eShop versions 4.7 and 5.0, we seperated the version numbers for Community/Professional Edition and Enterprise Edition: CE and PE were versioned as 4.7 as EE got the version number 5.0 due to several reasons.