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+.. index::
+    single: Resource; Components
+    single: Resource
+
+Resource
+========
+
+The Symfony CMF Resource component extends the `Puli`_ library to provide
+a resource abstraction layer which allows you more flexibility in how
+you access your data.
+
+In particular this package provides `Puli`_ repository implementations for various
+*database* backends. Repositories allow you to access your data via
+paths, for example:
+
+.. code-block:: php
+
+    <?php
+    $repo->get('/cmf/content/articles/my-article');
+
+or if you want to locate / list multiple files:
+
+.. code-block:: php
+
+    <?php
+    $repo->find('/cmf/content/articles/*');
+
+or list all articles with node name ``my-article-1`` from all sites:
+
+.. code-block:: php
+
+    <?php
+    $repo->find('/cmf/sites/*/content/articles/my-article');
+
+Using this repository solves a number of problems in the domain of CMS
+systems, it can be a key part solutions for:
+
+- Implementing multiple site/portal systems.
+- Combining different data sources into a single tree.
+- Referencing resources by immutable names.
+
+This documentation will not explain how to use `Puli`_ as it already has
+some `very good documentation`_
+
+Installation
+------------
+
+You can install this component `with composer`_ using the
+`symfony-cmf/resource`_ package. If you are using the
+``symfony-cmf/routing-bundle`` you do not need to specify the component
+separately, it is required automatically.
+
+Repositories
+------------
+
+The component aims to provide various Repository implementations. Currently
+only `PHPCR`_ and `PHPCR-ODM`_ are supported.
+
+PHPCR Repository
+~~~~~~~~~~~~~~~~
+
+The PHPCR repository acts as a proxy to the PHPCR Session.
+
+It can be instantaited as follows:
+
+.. code-block:: php
+
+    use Symfony\Cmf\Component\Resource\Finder\Phpcr\TraversalFinder;
+
+    $session = // phpcr session
+    $parser = new SelectorParser();
+    $finder = new TraversalFinder($session, $parser);
+    $repository = new PhpcrRepository($session, new TraversalFinder());
+
+    $resource = $repository->get('/foobar'); // returns ObjectResource
+    $phpcrNode = $resource->getObject();
+
+    $resourceCollection = $repository->find('/*/*bar/*');
+
+    foreach ($resourceCollection as $resource) {
+        echo $resource->getName();
+        echo $resource->getPath();
+        $phpcrNode = $resource->getObject();
+    }
+
+The roles of the classes are set out below:
+
+- **parser**: This class is responsible for parsing a glob pattern and
+  tokenizing it.
+- **finder**: Class which can resolve a glob pattern to a set of results.
+- **repository**: The Puli repository implementation
+
+The `TraversalFinder` implements the
+``Symfony\Cmf\Component\Resource\FinderInterface`` and traverses the PHPCR
+nodes using the ``PHPCR\NodeInterface`` API. Currently this is the only
+supported finder implementation for PHPCR.
+
+.. _`with composer`: http://getcomposer.org
+.. _`symfony-cmf/resource`: https://packagist.org/packages/symfony-cmf/resource
+.. _`Puli`: https://github.com/puli/puli
+.. _`PHPCR`: https://phpcr.github.io
+.. _`PHPCR-ODM`: http://www.doctrine-project.org/projects/phpcr-odm.html
+.. _`very good documentation`: http://puli.readthedocs.org/en/latest/