diff --git a/DependencyInjection/EXSystApiDocExtension.php b/DependencyInjection/EXSystApiDocExtension.php
index f243ab1..3e0e4f4 100644
--- a/DependencyInjection/EXSystApiDocExtension.php
+++ b/DependencyInjection/EXSystApiDocExtension.php
@@ -39,15 +39,15 @@ class EXSystApiDocExtension extends Extension
 
         $loader->load('services.xml');
 
-        // Removes useless services
-        if (!class_exists(ApiDoc::class)) {
-            $container->removeDefinition('exsyst_api_doc.route_describers.nelmio_annotation');
+        // Import services needed for each library
+        if (class_exists(ApiDoc::class)) {
+            $loader->load('nelmio_apidoc.xml');
         }
-        if (!class_exists(DocBlockFactory::class)) {
-            $container->removeDefinition('exsyst_api_doc.route_describers.php_doc');
+        if (class_exists(DocBlockFactory::class)) {
+            $loader->load('php_doc.xml');
         }
-        if (!class_exists(Swagger::class)) {
-            $container->removeDefinition('exsyst_api_doc.describers.swagger_php');
+        if (class_exists(Swagger::class)) {
+            $loader->load('swagger_php.xml');
         }
 
         $bundles = $container->getParameter('kernel.bundles');
diff --git a/Describer/DefaultDescriber.php b/Describer/DefaultDescriber.php
index 88a864e..3afcd0b 100644
--- a/Describer/DefaultDescriber.php
+++ b/Describer/DefaultDescriber.php
@@ -34,24 +34,8 @@ class DefaultDescriber implements DescriberInterface
         // Paths
         $paths = $api->getPaths();
         foreach ($paths as $uri => $path) {
-            // Path Parameters
-            preg_match_all('/\{(.+)\}/SU', $uri, $matches);
-            $pathParameters = $matches[1];
-
             foreach ($path->getMethods() as $method) {
                 $operation = $path->getOperation($method);
-                $parameters = $operation->getParameters();
-
-                // Default Path Parameters
-                foreach ($pathParameters as $pathParameter) {
-                    if ($parameters->has($pathParameter, 'path')) {
-                        continue;
-                    }
-
-                    $parameters->get($pathParameter, 'path')
-                        ->setRequired(true)
-                        ->setType('string');
-                }
 
                 // Default Response
                 if (0 === iterator_count($operation->getResponses())) {
diff --git a/Resources/config/api_platform.xml b/Resources/config/api_platform.xml
index 5d6a474..1d94baa 100644
--- a/Resources/config/api_platform.xml
+++ b/Resources/config/api_platform.xml
@@ -8,7 +8,7 @@
             <argument type="service" id="exsyst_api_doc.describers.api_platform.documentation" />
             <argument type="service" id="api_platform.swagger.normalizer.documentation" />
 
-            <tag name="exsyst_api_doc.describer" priority="-150" />
+            <tag name="exsyst_api_doc.describer" priority="-200" />
         </service>
 
         <service id="exsyst_api_doc.describers.api_platform.documentation" class="ApiPlatform\Core\Documentation\Documentation" public="false">
diff --git a/Resources/config/nelmio_apidoc.xml b/Resources/config/nelmio_apidoc.xml
new file mode 100644
index 0000000..b750164
--- /dev/null
+++ b/Resources/config/nelmio_apidoc.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" ?>
+<container xmlns="http://symfony.com/schema/dic/services"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
+
+    <services>
+        <service id="exsyst_api_doc.route_describers.nelmio_annotation" class="EXSyst\Bundle\ApiDocBundle\RouteDescriber\NelmioAnnotationDescriber" public="false">
+            <argument type="service" id="annotation_reader" />
+
+            <tag name="exsyst_api_doc.route_describer" priority="-250" />
+        </service>
+    </services>
+
+</container>
diff --git a/Resources/config/php_doc.xml b/Resources/config/php_doc.xml
new file mode 100644
index 0000000..d203ce5
--- /dev/null
+++ b/Resources/config/php_doc.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" ?>
+<container xmlns="http://symfony.com/schema/dic/services"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
+
+    <services>
+        <service id="exsyst_api_doc.route_describers.php_doc" class="EXSyst\Bundle\ApiDocBundle\RouteDescriber\PhpDocDescriber" public="false">
+            <tag name="exsyst_api_doc.route_describer" priority="-1000" />
+        </service>
+    </services>
+
+</container>
diff --git a/Resources/config/services.xml b/Resources/config/services.xml
index 26f39f9..c352ee3 100644
--- a/Resources/config/services.xml
+++ b/Resources/config/services.xml
@@ -9,12 +9,6 @@
         </service>
 
         <!-- Extractors -->
-        <service id="exsyst_api_doc.describers.swagger_php" class="EXSyst\Bundle\ApiDocBundle\Describer\SwaggerPhpDescriber" public="false">
-            <argument>%kernel.root_dir%</argument>
-
-            <tag name="exsyst_api_doc.describer" priority="-150" />
-        </service>
-
         <service id="exsyst_api_doc.describers.route" class="EXSyst\Bundle\ApiDocBundle\Describer\RouteDescriber" public="false">
             <argument type="service" id="service_container" />
             <argument type="service" id="router" />
@@ -30,16 +24,6 @@
 
         <!-- Routing Extractors -->
         <service id="exsyst_api_doc.route_describers.route_metadata" class="EXSyst\Bundle\ApiDocBundle\RouteDescriber\RouteMetadataDescriber" public="false">
-            <tag name="exsyst_api_doc.route_describer" priority="-50" />
-        </service>
-
-        <service id="exsyst_api_doc.route_describers.php_doc" class="EXSyst\Bundle\ApiDocBundle\RouteDescriber\PhpDocDescriber" public="false">
-            <tag name="exsyst_api_doc.route_describer" priority="-70" />
-        </service>
-
-        <service id="exsyst_api_doc.route_describers.nelmio_annotation" class="EXSyst\Bundle\ApiDocBundle\RouteDescriber\NelmioAnnotationDescriber" public="false">
-            <argument type="service" id="annotation_reader" />
-
             <tag name="exsyst_api_doc.route_describer" priority="-100" />
         </service>
     </services>
diff --git a/Resources/config/swagger_php.xml b/Resources/config/swagger_php.xml
new file mode 100644
index 0000000..86859d2
--- /dev/null
+++ b/Resources/config/swagger_php.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" ?>
+<container xmlns="http://symfony.com/schema/dic/services"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
+
+    <services>
+        <service id="exsyst_api_doc.describers.swagger_php" class="EXSyst\Bundle\ApiDocBundle\Describer\SwaggerPhpDescriber" public="false">
+            <argument>%kernel.root_dir%</argument>
+
+            <tag name="exsyst_api_doc.describer" priority="-300" />
+        </service>
+    </services>
+
+</container>
diff --git a/RouteDescriber/FosRestDescriber.php b/RouteDescriber/FosRestDescriber.php
new file mode 100644
index 0000000..d1e19f9
--- /dev/null
+++ b/RouteDescriber/FosRestDescriber.php
@@ -0,0 +1,82 @@
+<?php
+
+/*
+ * This file is part of the ApiDocBundle package.
+ *
+ * (c) EXSyst
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace EXSyst\Bundle\ApiDocBundle\RouteDescriber;
+
+use Doctrine\Common\Annotations\Reader;
+use EXSyst\Component\Swagger\Parameter;
+use EXSyst\Component\Swagger\Swagger;
+use FOS\RestBundle\Controller\Annotations\RequestParam;
+use FOS\RestBundle\Controller\Annotations\QueryParam;
+use Nelmio\ApiDocBundle\Annotation\ApiDoc;
+use Symfony\Component\Routing\Route;
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\Constraints\Regex;
+
+class FosRestDescriber implements RouteDescriberInterface
+{
+    use RouteDescriberTrait;
+
+    private $annotationReader;
+
+    public function __construct(Reader $annotationReader)
+    {
+        $this->annotationReader = $annotationReader;
+    }
+
+    public function describe(Swagger $api, Route $route, \ReflectionMethod $reflectionMethod)
+    {
+        $annotations = $this->annotationReader->getMethodAnnotations();
+        $annotations = array_filter($annotations, function ($value) {
+            return $value instanceof RequestParam || $value instanceof QueryParam;
+        });
+
+        foreach ($this->getOperations($api, $route) as $operation) {
+            foreach ($annotations as $annotation) {
+                $in = $annotation instanceof QueryParam ? 'query' : 'formData';
+                $parameter = $operation->getParameters()->get($annotation->getKey(), $in);
+
+                $parameter->setAllowEmptyValue($annotation->nullable && $annotation->allowBlank);
+                $parameter->setType($annotation->map ? 'array' : 'string');
+                $parameter->setDefault($annotation->getDefault());
+                if (null === $parameter->getDescription()) {
+                    $parameter->setDescription($annotation->description);
+                }
+
+                $normalizedRequirements = $this->normalizeRequirements($annotation->requirements);
+                if (null !== $normalizedRequirements) {
+                    $parameter->setFormat($normalizedRequirements);
+                }
+            }
+        }
+    }
+
+    private function normalizeRequirements($requirements)
+    {
+        // if pattern
+        if (isset($requirements['rule'])) {
+            return (string) $requirements['rule'];
+        }
+        if (is_string($requirements)) {
+            return $requirements;
+        }
+        // if custom constraint
+        if ($requirements instanceof Constraint) {
+            if ($requirements instanceof Regex) {
+                return $requirements->getHtmlPattern();
+            }
+
+            $reflectionClass = new \ReflectionClass($requirements);
+
+            return $reflectionClass->getShortName();
+        }
+    }
+}
diff --git a/RouteDescriber/NelmioAnnotationDescriber.php b/RouteDescriber/NelmioAnnotationDescriber.php
index 2bc577c..c2237bf 100644
--- a/RouteDescriber/NelmioAnnotationDescriber.php
+++ b/RouteDescriber/NelmioAnnotationDescriber.php
@@ -39,28 +39,41 @@ class NelmioAnnotationDescriber implements RouteDescriberInterface
         $annotationArray = $annotation->toArray();
 
         foreach ($this->getOperations($api, $route) as $operation) {
-            if ($annotation->getDescription()) {
+            if (null === $operation->getDescription()) {
                 $operation->setDescription($annotation->getDescription());
             }
-            $operation->setDeprecated($operation->getDeprecated() || $annotation->getDeprecated());
+            if (null === $operation->getDeprecated() && $annotation->getDeprecated()) {
+                $operation->setDeprecated(true);
+            }
 
             // Request parameters
             foreach ($annotation->getParameters() as $name => $configuration) {
                 $parameter = $operation->getParameters()->get($name, 'formData');
-                if (isset($configuration['required'])) {
-                    $parameter->setRequired($parameter->getRequired() || $configuration['required']);
+                if (isset($configuration['required']) && $configuration['required']) {
+                    $parameter->setRequired(true);
                 }
 
                 $this->configureParameter($parameter, $configuration);
             }
 
-            // Query parameters
+            // Query/Path required parameters
+            $compiledRoute = $route->compile();
+            $pathVariables = $compiledRoute->getVariables();
+            $hostVariables = $compiledRoute->getHostVariables();
             foreach ($annotation->getRequirements() as $name => $configuration) {
-                $parameter = $operation->getParameters()->get($name, 'query');
+                if (in_array($name, $pathVariables)) {
+                    $in = 'path';
+                } elseif (!in_array($name, $hostVariables)) {
+                    $in = 'query';
+                } else { // Host variables not supported
+                    continue;
+                }
+                $parameter = $operation->getParameters()->get($name, $in);
                 $parameter->setRequired(true);
 
                 $this->configureParameter($parameter, $configuration);
             }
+            // Optional Query parameters
             foreach ($annotation->getFilters() as $name => $configuration) {
                 $parameter = $operation->getParameters()->get($name, 'query');
                 $this->configureParameter($parameter, $configuration);
diff --git a/RouteDescriber/PhpDocDescriber.php b/RouteDescriber/PhpDocDescriber.php
index 7c73b53..90570bd 100644
--- a/RouteDescriber/PhpDocDescriber.php
+++ b/RouteDescriber/PhpDocDescriber.php
@@ -46,8 +46,12 @@ class PhpDocDescriber implements RouteDescriberInterface
 
         foreach ($this->getOperations($api, $route) as $operation) {
             if (null !== $docBlock) {
-                $operation->setSummary($docBlock->getSummary());
-                $operation->setDescription((string) $docBlock->getDescription());
+                if (null === $operation->getSummary() && '' !== $docBlock->getSummary()) {
+                    $operation->setSummary($docBlock->getSummary());
+                }
+                if (null === $operation->getDescription() && '' !== (string) $docBlock->getDescription()) {
+                    $operation->setDescription((string) $docBlock->getDescription());
+                }
                 if ($docBlock->hasTag('deprecated')) {
                     $operation->setDeprecated(true);
                 }
diff --git a/RouteDescriber/RouteMetadataDescriber.php b/RouteDescriber/RouteMetadataDescriber.php
index a32685b..84a48f1 100644
--- a/RouteDescriber/RouteMetadataDescriber.php
+++ b/RouteDescriber/RouteMetadataDescriber.php
@@ -23,11 +23,18 @@ class RouteMetadataDescriber implements RouteDescriberInterface
         foreach ($this->getOperations($api, $route) as $operation) {
             $operation->merge(['schemes' => $route->getSchemes()]);
 
-            foreach ($route->getRequirements() as $parameterName => $requirement) {
-                $parameter = $operation->getParameters()->get($parameterName, 'path');
+            $requirements = $route->getRequirements();
+            $compiledRoute = $route->compile();
+
+            // Don't include path variables
+            foreach ($compiledRoute->getPathVariables() as $pathVariable) {
+                $parameter = $operation->getParameters()->get($pathVariable, 'path');
                 $parameter->setRequired(true);
                 $parameter->setType('string');
-                $parameter->setFormat($requirement);
+
+                if (isset($requirements[$pathVariable])) {
+                    $parameter->setFormat($requirements[$pathVariable]);
+                }
             }
         }
     }
diff --git a/Tests/Functional/FunctionalTest.php b/Tests/Functional/FunctionalTest.php
index 203707f..b69c747 100644
--- a/Tests/Functional/FunctionalTest.php
+++ b/Tests/Functional/FunctionalTest.php
@@ -38,7 +38,7 @@ class FunctionalTest extends WebTestCase
         $operation = $this->getOperation('/nelmio/{foo}', 'post');
 
         $this->assertEquals('This action is described.', $operation->getDescription());
-        $this->assertFalse($operation->getDeprecated());
+        $this->assertNull($operation->getDeprecated());
 
         $foo = $operation->getParameters()->get('foo', 'path');
         $this->assertTrue($foo->getRequired());
diff --git a/composer.json b/composer.json
index d4a997d..c1ad59e 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,7 @@
     "require": {
         "php": "^7.0",
         "symfony/framework-bundle": "^3.2",
-        "exsyst/swagger": "dev-master"
+        "exsyst/swagger": "~0.2.1"
     },
     "require-dev": {
         "symfony/validator": "^3.2",
@@ -20,17 +20,20 @@
         "symfony/cache": "^3.2",
         "symfony/phpunit-bridge": "^3.2",
         "sensio/framework-extra-bundle": "^3.0",
+        "phpunit/phpunit": "^5.4",
+
         "nelmio/api-doc-bundle": "^2.0",
         "phpdocumentor/reflection-docblock": "^3.1",
-        "phpunit/phpunit": "^5.4",
         "zircote/swagger-php": "^2.0",
-        "api-platform/core": "dev-master"
+        "api-platform/core": "dev-master",
+        "friendsofsymfony/rest-bundle": "^2.0"
     },
     "suggest": {
         "nelmio/api-doc-bundle": "For using the ApiDoc annotation.",
         "phpdocumentor/reflection-docblock": "For parsing php docs.",
         "zircote/swagger-php": "For using swagger annotations.",
-        "api-platform/core": "For using an API oriented framework."
+        "api-platform/core": "For using an API oriented framework.",
+        "friendsofsymfony/rest-bundle": "For using the parameters annotations."
     },
     "autoload": {
         "psr-4": {