zendframework · weierophinney · Jan 19, 2016 · Nov 5, 2015 · Nov 5, 2015
diff --git a/book/zend.form.advanced-use-of-forms.md b/book/zend.form.advanced-use-of-forms.md
diff --git a/book/zend.form.collections.md b/book/zend.form.collections.md
diff --git a/book/zend.form.elements.md b/book/zend.form.elements.md
diff --git a/book/zend.form.file-upload.md b/book/zend.form.file-upload.md
diff --git a/book/zend.form.intro.md b/book/zend.form.intro.md
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+# Introduction
+
+`Zend\Form` is intended primarily as a bridge between your domain models and the View Layer. It
+composes a thin layer of objects representing form elements, an \[InputFilter\](zend.input-filter),
+and a small number of methods for binding data to and from the form and attached objects.
+
+The `Zend\Form` component consists of the following objects:
+
+- `Elements`, which simply consist of a name and attributes.
+- `Fieldsets`, which extend from `Elements`, but allow composing other fieldsets and elements.
+- `Forms`, which extend from `Fieldsets` (and thus `Elements`). They provide data and object
+binding, and compose \[InputFilters\](zend.input-filter.intro). Data binding is done via
+\[Zend\\Stdlib\\Hydrator\](zend.stdlib.hydrator).
+
+To facilitate usage with the view layer, the `Zend\Form` component also aggregates a number of
+form-specific view helpers. These accept elements, fieldsets, and/or forms, and use the attributes
+they compose to render markup.
+
+A small number of specialized elements are provided for accomplishing application-centric tasks.
+These include the `Csrf` element, used to prevent Cross Site Request Forgery attacks, and the
+`Captcha` element, used to display and validate \[CAPTCHAs\](zend.captcha).
+
+A `Factory` is provided to facilitate creation of elements, fieldsets, forms, and the related input
+filter. The default `Form` implementation is backed by a factory to facilitate extension and ease
+the process of form creation.
+
+The code related to forms can often spread between a variety of concerns: a form definition, an
+input filter definition, a domain model class, and one or more hydrator implementations. As such,
+finding the various bits of code and how they relate can become tedious. To simplify the situation,
+you can also annotate your domain model class, detailing the various input filter definitions,
+attributes, and hydrators that should all be used together. `Zend\Form\Annotation\AnnotationBuilder`
+can then be used to build the various objects you need.