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README.md

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-# PMD - Salesfoce.com Apex
+# PMD
 
-[PMD] (https://github.com/pmd/pmd) fork to develop and maintain a language module for [Salesforce.com Apex] (https://developer.salesforce.com/page/Apex)
+[![Build Status](https://travis-ci.org/pmd/pmd.svg?branch=master)](https://travis-ci.org/pmd/pmd)
 
-### Code Climate Engine
-There is also a Code Climate Engine based on this PMD module for Salesforce.com Apex. You can find more information about the engine on our [Code Climate Apex Engine GitHub repository] (https://github.com/Up2Go/codeclimate-apex).
+## About
+
+PMD is a source code analyzer. It finds common programming flaws like unused variables, empty catch blocks,
+unnecessary object creation, and so forth. It supports Java, JavaScript, Salesforce.com Apex, XML, XSL.
+Additionally it includes CPD, the copy-paste-detector. CPD finds duplicated code in
+Java, C, C++, C#, PHP, Ruby, Fortran, JavaScript, Salesforce.com Apex, Perl, Swift.
+
+## Source
+
+Our latest source of PMD can be found on [GitHub]. Fork us!
+
+### How to build PMD?
+
+You'll need to have a `~/.m2/toolchains.xml` file setup with jdk 1.6 (for pmd 5.3.x), jdk 1.7 (for pmd 5.4.x and pmd 5.5.x)
+and jdk 1.8 (for some features in pmd 5.5.x). See [maven toolchains](https://maven.apache.org/guides/mini/guide-using-toolchains.html).
+A example file can be found here: [example-toolchains.xml](https://github.com/pmd/pmd/blob/master/example-toolchains.xml).
+
+Use maven in the top-level directory:
+
+    mvn clean package
+
+This will create the zip files in the directory `pmd-dist/target`:
+
+    cd pmd-dist/target
+    ls *.zip
+
+That's all !
+
+### How to build the documentation (maven site)?
+
+Building the maven site is done with the following commands:
+
+    mvn clean install -DskipTests=true
+    mvn install site site:stage -Psite
+
+You'll find the built site in the directory `target/staging/`.
+
+### Bug Reports
+
+We are using Sourceforge for bug tracking. Please file your bugs at <https://sourceforge.net/p/pmd/bugs/>.
+
+### Pull Requests
+
+Pull requests are always welcome: <https://github.com/pmd/pmd/pulls>
+
+
+## News and Website
+
+More information can be found on our [Website] and on [SourceForge].
+
+
+[GitHub]: https://github.com/pmd/pmd
+[Website]: https://pmd.github.io
+[SourceForge]: https://sourceforge.net/projects/pmd/