Update MAVEN.md

h2/MAVEN.md

@@ -5,24 +5,59 @@ Welcome to H2, the Java SQL database. The main features of H2 are:
 * Very fast, open source, JDBC API
 * Embedded and server modes; in-memory databases
 * Browser based Console application
-* Small footprint: around 1.5 MB jar file size
+* Small footprint: around 2 MB jar file size
 
 ## Experimental Building & Testing with Maven
 
+### Preparation
+
+Use non-Maven build to create all necessary resources:
+
+```Batchfile
+./build.cmd compile
+```
+
+or
+
+```sh
+./build.sh compile
+```
+
 ### Building
 
-H2 uses [Maven Wrapper](https://github.com/takari/maven-wrapper) setup, you can instruct users to run wrapper scripts:
+To build only the database jar use
+
+```sh
+mvn -Dmaven.test.skip=true package
+```
 
-> $ ./mvnw clean test
+If you don't have Maven installed use included [Maven Wrapper](https://github.com/takari/maven-wrapper) setup:
+
+```sh
+./mvnw -Dmaven.test.skip=true package
+```
 
 or
 
-> $ ./mvnw.cmd clean test
+```Batchfile
+./mvnw.cmd -Dmaven.test.skip=true package
+```
+
+Please note that jar generated with Maven is larger than official one and it does not include OSGi attributes.
+Use build script with `jar` target instead if you need a compatible jar.
+
+### Testing
+
+To run the tests use
+
+```sh
+mvn clean test
+```
 
 ### Running
 
 You can run the server like this
 
-```
+```sh
 mvn exec:java -Dexec.mainClass=org.h2.tools.Server  
 ```