When VuFind 2.0 went into development, the Zend Framework community was in the process of developing their own 2.0 version. This led to an unfortunate situation: the first iteration of VuFind 2.0 development had to use Zend Framework 1, even though a new and different version of the software was on its way. This is why the 2.0alpha release uses ZF1 but subsequent versions are built for ZF2.

Until ZF2 is officially released, documentation can be a bit hard to find. Here are some helpful resources:

• Zend Framework Webinars - Many of these online videos deal with ZF2 issues.
• Zend Skeleton Application - An example application to help with building ZF2-based software.
• Getting Started with Zend Framework 2 - A tutorial which extends the skeleton application.
• Programmer's Reference Guide - The official (but, as of this writing, not yet complete) ZF2 documentation.
• VuFind/ZF2 Blog Posts - Demian is writing a series of blog posts about moving VuFind to ZF2; you can see them at this link.