This document details any special actions that need to be taken when upgrading Wookie from a previous version. For general information on new features and improvements, see NEW_AND_NOTEWORTHY. FROM 0.9.0 TO 0.9.1 =================== A number of changes to the data model were put in place in 0.9.1, meaning that any existing databases must be updated. Scripts for migrating databases to 0.9.1 can be found in /scripts/migration. From 0.9.1 the JCR persistence mechanism is an optional module that must be built separately; any installations using JCR will need to upgrade using a source release, building the modules/jcr subproject.