diff --git a/docs/reference/document_mapper.rst b/docs/reference/document_mapper.rst
new file mode 100644
index 00000000..9883bd53
--- /dev/null
+++ b/docs/reference/document_mapper.rst
@@ -0,0 +1,32 @@
+DocumentFactory
+===============
+DocumentFactory is an implementation of field mappers for Elasticsearch modeled after the Solr implementation using the
+template method pattern. It implements the Elasticsearch ``DocumentFactoryInterface`` and its methods ``fromContent()``
+and ``fromLocation()`` add fields to document. These methods index the fields from the suitable field mappers.
+
+``DocumentFactory`` depends on the elasticsearch service ``DocumentFactoryInterface`` , so it is registered in a
+Compiler Pass since elasticsearch is not available directly from the bundle.
+
+To use this feature, ensure you have elasticsearch bundle added to your project.
+
+The ``DocumentFactory`` service uses all base field mapper services to index content into the correct document
+(content, location, or translation-dependent document)::
+
+    ContentFieldMapper
+    LocationFieldMapper
+    ContentTranslationFieldMapper
+    LocationTranslationFieldMapper
+    BlockFieldMapper
+    BlockTranslationFieldMapper
+
+These services are abstract classes containing methods ``accept()`` and ``mapFields()`` which are implemented by new
+field mappers as needed.
+
+To add a new field mapper, create a class that extends one of the base field mappers above, implements its methods, and
+registers the service with one of the following tags, depending on the base field mapper::
+
+    netgen.ibexa_search_extra.elasticsearch.field_mapper.content
+    netgen.ibexa_search_extra.elasticsearch.field_mapper.location
+    netgen.ibexa_search_extra.elasticsearch.field_mapper.content_translation
+    netgen.ibexa_search_extra.elasticsearch.field_mapper.location_translation
+    netgen.ibexa_search_extra.elasticsearch.field_mapper.block_translation
diff --git a/docs/reference/index.rst b/docs/reference/index.rst
index 996318ee..95856d7b 100644
--- a/docs/reference/index.rst
+++ b/docs/reference/index.rst
@@ -9,5 +9,7 @@ Reference
     subdocuments
     spellcheck_suggestions
     extra_fields
+    asynchronous_indexing
+    document_mapper
 
 .. include:: /reference/map.rst.inc
diff --git a/docs/reference/map.rst.inc b/docs/reference/map.rst.inc
index 626ee8e9..bdeafe91 100644
--- a/docs/reference/map.rst.inc
+++ b/docs/reference/map.rst.inc
@@ -4,3 +4,4 @@
 * :doc:`/reference/subdocuments`
 * :doc:`/reference/spellcheck_suggestions`
 * :doc:`/reference/extra_fields`
+* :doc:`/reference/document_mapper`