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+# XSD
+
+XSD is an open-source, cross-platform XML Schema to C++ data binding
+compiler. Provided with an XML document specification (XML Schema), it
+generates C++ classes that represent the given vocabulary as well as XML
+parsing and serialization code. You can then access the data stored in XML
+using types and functions that semantically correspond to your application
+domain rather than dealing with generic elements/attributes and raw strings.
+
+For further information, refer to the [XSD project
+page](https://codesynthesis.com/products/xsd/).
+
+## Usage
+
+XSD consists of several packages with the main ones being `xsd` (the XML
+Schema to C++ compiler) and `libxsd` (the runtime library). There are also
+several `*-tests` packages as well as `xsd-examples`.
+
+When specifying dependencies on XSD packages in your project, the `xsd`
+package should be a build-time dependency. The `libxsd` library is
+header-only and because it can be used either with Xerces-C++ or
+Expat as the underlying XML parser, it does not have a dependency on
+either, expecting your project to make the choice by depending on
+one or the other explicitly and then importing and linking the
+corresponding library.
+
+So, putting it all together, your project's `manifest` would normally
+have the following fragment if using Xerces-C++:
+
+```
+depends: * xsd ^4.2.0
+depends: libxsd ^4.2.0
+depends  libxerces-c ^3.2.4
+```
+
+Or the following fragment if using Expat:
+
+```
+depends: * xsd ^4.2.0
+depends: libxsd ^4.2.0
+depends  libexpat ^2.5.0
+```
+
+Then your `buildfile` would have something along these lines if using
+Xerces-C++:
+
+```
+import! [metadata] xsd = xsd%exe{xsd}
+
+import libs  = libxsd%lib{xsd}
+import libs += libxerces-c%lib{xerces-c}
+```
+
+Or along these lines if using Expat:
+
+```
+import! [metadata] xsd = xsd%exe{xsd}
+
+import libs  = libxsd%lib{xsd}
+import libs += libexpat%lib{expat}
+```
+
+Note that the `xsd` executable provides `build2` metadata.
+
+The compilation of XML Schema to C++ can be implemented using ad hoc recipes
+or rules. See the `xsd-examples` package for the complete examples.