bergie/phpcr-odm — comment on commit ae5c19f50349b35d20a3447345d0c820572f0d64
File: lib/Doctrine/ODM/PHPCR/Document/File.php line 183
By bergie:

The way I see it, a _mandatory_ property of a node is a bit like required fields in forms - you have to provide valid data there before you can save the node. But I would need to double-check the spec on this.