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+= MD-SAL
+
+== Overview
+
+The Model-Driven Service Adaptation Layer (MD-SAL) is message-bus inspired
+extensible middleware component that provides messaging and data storage
+functionality based on data and interface models defined by application developers
+(i.e. user-defined models).
+
+The MD-SAL:
+
+ * Defines a *common-layer, concepts, data model building blocks and messaging
+   patterns* and provides infrastructure / framework for applications and
+   inter-application communication.
+
+// FIXME: Common integration point / reword this better
+ * Provide common support for user-defined transport and payload formats, including
+   payload serialization and adaptation (e.g. binary, XML or JSON).
+
+The MD-SAL uses *YANG* as the modeling language for both interface and data
+definitions, and provides a messaging and data-centric runtime for such services
+based on YANG modeling.
+
+The MD-SAL provides two different API types (flavours): +
+
+Binding:: 
+  MD-SAL APIs which extensively uses APIs and classes generated
+  from YANG models, which provides compile-time safety and allows developers
+  to use more natural way to work with data.
+DOM::
+  (Document Object Model) APIs which uses DOM-like
+  representation of data, which makes them more powerful, but provides less
+  compile-time safety.
+
+NOTE: Model-driven nature of the MD-SAL and *DOM*-based APIs allows for
+behind-the-scene API and payload type mediation and transformation
+to facilitate seamless communication between applications - this enables
+for other components and applications to provide connectors / expose different
+set of APIs and derive most of its functionality purely from models, which
+all existing code can benefit from without modification.
+For example *RESTCONF Connector* is an application built on top of MD-SAL
+and exposes YANG-modeled application APIs transparently via HTTP and adds support
+for XML and JSON payload type.
+
+== Contributing
+
+MD-SAL is part of http://opendaylight.org[OpenDaylight Project], where we
+use http://git.opendaylight.org[Gerrit] for incoming patch reviews.