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The Doctrine PHPCR ODM documentation is comprised of tutorials, a reference section and cookbook articles that explain different parts of the PHP Content Repository Object Document mapper.
If this documentation is not helping to answer questions you have about Doctrine PHPCR ODM don't panic. You can get help from different sources:
Also have a look at the Doctrine ORM cookbook, notably the entries in the Implementation section apply to PHPCR-ODM as well.