title: What is the correct maven version for my proto branch?
body: <p>On a big project recently being built with maven3, we are currently working on our 4.1-SNAPSHOT branch for new developments to be delivered. 
  But I need to create a 2nd branch where some experimental features are developed. These may or may not be back-integrated after a decision is being done at the end of the dev.<br>
  For this I usually create a new branch called "proto". I need this version to be in snapshot mode too and I try to choose a version that will be Maven compliant.<br>
  I consulted the Maven reference guide <a href="http://www.sonatype.com/books/mvnref-book/reference/pom-relationships-sect-pom-syntax.html" rel="nofollow">http://www.sonatype.com/books/mvnref-book/reference/pom-relationships-sect-pom-syntax.html</a> and resulted in "4.1-proto-01-SNAPSHOT".
  Is that correct or may I lead into unforeseen conflicts ?</p>