Bootstraps intro

Author: wouterj

components/expression_language/introduction.rst

@@ -0,0 +1,23 @@
+.. index::
+    single: Expressions
+    Single: Components; Expression Language
+
+The ExpressionLanguage Component
+=================================
+
+    The ExpressionLanguage component provides an engine that can compile and
+    evaluate expressions. An expression is a one-liner that returns a value
+    (mostly, but not limited to, Booleans).
+
+.. versionadded:: 2.4
+    The ExpressionLanguage Component was new in Symfony 2.4.
+
+Installation
+------------
+
+You can install the component in 2 different ways:
+
+* Use the official Git repository (https://github.com/symfony/ExpressionLanguage);
+* :doc:`Install it via Composer </components/using_components>` (``symfony/expression-language`` on `Packagist`_).
+
+.. _Packagist: https://packagist.org/packages/symfony/expression-language

components/map.rst.inc

@@ -59,6 +59,8 @@
 
 * :doc:`/components/expression_language/index`
 
+  * :doc:`/components/expression_language/introduction`
+
 * **Filesystem**
 
   * :doc:`/components/filesystem`