diff --git a/src/exposers/class-tainacan-exposers.php b/src/exposers/class-tainacan-exposers.php
index 2560d9b7f..0dc0ed6fa 100644
--- a/src/exposers/class-tainacan-exposers.php
+++ b/src/exposers/class-tainacan-exposers.php
@@ -47,12 +47,15 @@ class Exposers {
 	 * @param $class_name string | object The class name or the instance
 	 */
 	public function register_exposer_type( $class_name ){
+	    $obj = $class_name;
 		if( is_object( $class_name ) ){
 			$class_name = get_class( $class_name );
+		} else {
+		    $obj = new $class_name;
 		}
 		
 		if(!in_array( $class_name, $this->types)){
-			$this->types[] = $class_name;
+		    $this->types[$obj->slug] = $class_name;
 		}
 	}
 	
@@ -62,12 +65,15 @@ class Exposers {
 	 * @param $class_name string | object The class name or the object instance
 	 */
 	public function register_exposer_mapper( $class_name ){
+	    $obj = $class_name;
 		if( is_object( $class_name ) ){
 			$class_name = get_class( $class_name );
+		} else {
+		    $obj = new $class_name;
 		}
 		
 		if(!in_array( $class_name, $this->mappers)){
-			$this->mappers[] = $class_name;
+			$this->mappers[$obj->slug] = $class_name;
 		}
 	}
 	
@@ -79,6 +85,13 @@ class Exposers {
 	 * @return string
 	 */
 	public function check_class_name($class_name, $root = false, $prefix = 'Tainacan\Exposers\Types\\') {
+	    if(array_key_exists($class_name, $this->types)) {
+            $class_name = $this->types[$class_name];
+            $prefix = '';
+	    } elseif( array_key_exists($class_name, $this->mappers)) {
+	        $class_name = $this->mappers[$class_name];
+	        $prefix = '';
+	    }
 		$class = $prefix.sanitize_text_field($class_name);
 		$class = str_replace(['-', ' '], ['_', '_'], $class);
 		
@@ -218,6 +231,8 @@ class Exposers {
 	 * @return boolean
 	 */
 	public function has_mapper($mapper) {
+	    if(array_key_exists($mapper, $this->mappers)) return true;
+	    
 		return in_array($this->check_class_name($mapper, false, self::MAPPER_CLASS_PREFIX), $this->mappers);
 	}
 	
diff --git a/src/exposers/types/class-tainacan-csv.php b/src/exposers/types/class-tainacan-csv.php
index 48e9c389f..b2d02bccc 100644
--- a/src/exposers/types/class-tainacan-csv.php
+++ b/src/exposers/types/class-tainacan-csv.php
@@ -12,7 +12,8 @@ class Csv extends Type {
 	 * List of supported mappers
 	 * @var array
 	 */
-	public $mappers = ['Value']; 
+	public $mappers = ['Value'];
+	public $slug = 'csv'; // type slug for url safe
 	
 	/**
 	 * 
diff --git a/src/exposers/types/class-tainacan-html.php b/src/exposers/types/class-tainacan-html.php
index 101b7e985..0e0506f92 100644
--- a/src/exposers/types/class-tainacan-html.php
+++ b/src/exposers/types/class-tainacan-html.php
@@ -8,7 +8,8 @@ namespace Tainacan\Exposers\Types;
  */
 class Html extends Type {
 	
-	public $mappers = ['Value']; 
+	public $mappers = ['Value'];
+	public $slug = 'html'; // type slug for url safe
 	
 	/**
 	 * 
diff --git a/src/exposers/types/class-tainacan-oai-pmh.php b/src/exposers/types/class-tainacan-oai-pmh.php
index 94a5877b8..914234217 100644
--- a/src/exposers/types/class-tainacan-oai-pmh.php
+++ b/src/exposers/types/class-tainacan-oai-pmh.php
@@ -9,6 +9,7 @@ namespace Tainacan\Exposers\Types;
 class OAI_PMH extends Xml {
 	
 	public $mappers = ['Dublin Core'];
+	public $slug = 'oai-pmh'; // type slug for url safe
 	
 	const XML_OAI_DC_NAMESPACE = "http://www.openarchives.org/OAI/2.0/oai_dc/";
 	/**
diff --git a/src/exposers/types/class-tainacan-txt.php b/src/exposers/types/class-tainacan-txt.php
index 133e3167e..1ca0f1d9f 100644
--- a/src/exposers/types/class-tainacan-txt.php
+++ b/src/exposers/types/class-tainacan-txt.php
@@ -9,6 +9,7 @@ namespace Tainacan\Exposers\Types;
 class Txt extends Type {
 	
 	public $mappers = ['Value'];
+	public $slug = 'txt'; // type slug for url safe
 	
 	/**
 	 * 
diff --git a/src/exposers/types/class-tainacan-type.php b/src/exposers/types/class-tainacan-type.php
index 967f59a1d..f86f14d83 100644
--- a/src/exposers/types/class-tainacan-type.php
+++ b/src/exposers/types/class-tainacan-type.php
@@ -10,6 +10,7 @@ abstract class Type {
 	
 	protected $mappers = true; // List of supported mapper, leave true for all
 	protected $extension = 'tnc'; // extension sufix for multi operation system compatibility
+	public $slug = ''; // type slug for url safe
 	
 	/**
 	 * Change response after api callbacks
diff --git a/src/exposers/types/class-tainacan-xml.php b/src/exposers/types/class-tainacan-xml.php
index 9943a76cd..457ef3347 100644
--- a/src/exposers/types/class-tainacan-xml.php
+++ b/src/exposers/types/class-tainacan-xml.php
@@ -13,6 +13,7 @@ class Xml extends Type {
 	 * @var string
 	 */
 	protected $extension = 'xml';
+	public $slug = 'xml'; // type slug for url safe
 	
 	/**
 	 * 
diff --git a/tests/test-api-exposers.php b/tests/test-api-exposers.php
index 9a3fbc925..2cec5bfb1 100644
--- a/tests/test-api-exposers.php
+++ b/tests/test-api-exposers.php
@@ -166,6 +166,58 @@ class TAINACAN_REST_Exposers extends TAINACAN_UnitApiTestCase {
 		
 	}
 	
+	/**
+	 * @group exposers-slug
+	 */
+	public function test_exposer_map_by_slug() {
+	    global $Tainacan_Fields, $Tainacan_Item_Metadata;
+	    extract($this->create_meta_requirements());
+	    
+	    $item__metadata_json = json_encode([
+	        'values'       => 'TestValues_exposers_slug',
+	    ]);
+	    
+	    $request  = new \WP_REST_Request('POST', $this->namespace . '/item/' . $this->item->get_id() . '/metadata/' . $this->field->get_id() );
+	    $request->set_body($item__metadata_json);
+	    
+	    $response = $this->server->dispatch($request);
+	    
+	    $this->assertEquals(200, $response->get_status());
+	    
+	    $data = $response->get_data();
+	    
+	    $this->assertEquals($this->item->get_id(), $data['item']['id']);
+	    $this->assertEquals('TestValues_exposers_slug', $data['value']);
+	    
+	    $item_exposer_json = json_encode([
+	        'exposer-map'       => 'dublin-core',
+	    ]);
+	    $request  = new \WP_REST_Request('GET', $this->namespace . '/item/' . $this->item->get_id() . '/metadata/'. $this->field->get_id() );
+	    $request->set_body($item_exposer_json);
+	    $response = $this->server->dispatch($request);
+	    $this->assertEquals(200, $response->get_status());
+	    $data = $response->get_data();
+	    $this->assertEquals('TestValues_exposers_slug', $data['dc:language']);
+	    
+	    $item_exposer_json = json_encode([
+	        'exposer-type'       => 'xml',
+	        'exposer-map'       => 'dublin-core',
+	    ]);
+	    $request = new \WP_REST_Request('GET', $this->namespace . '/item/' . $this->item->get_id() . '/metadata' );
+	    $request->set_body($item_exposer_json);
+	    $response = $this->server->dispatch($request);
+	    $this->assertEquals(200, $response->get_status());
+	    $data = $response->get_data();
+	    
+	    $xml = new \SimpleXMLElement($data);
+	    $rdf = $xml->children(\Tainacan\Exposers\Mappers\Dublin_Core::XML_RDF_NAMESPACE);
+	    $dc = $rdf->children(\Tainacan\Exposers\Mappers\Dublin_Core::XML_DC_NAMESPACE);
+	    
+	    $this->assertEquals('adasdasdsa', $dc->description);
+	    $this->assertEquals('item_teste_Expose', $dc->title);
+	    $this->assertEquals('TestValues_exposers_slug', $dc->language);
+	}
+	
 	/**
 	 * @group oai-pmh
 	 */