title: Subversion: how to create a tag with folders at multiple revisions
body: <p>We have a large project which consists of a single build job (Maven, via a pom.xml, with multiple child folders etc).  Developers have given us three different revision numbers, and would like us to create a single tag that we can feed the (Hudson) build job.</p>
  
  <p>Example:<br>
  / -- at rev X<br>
  /project1 -- at rev Y<br>
  /project2 -- at rev Z</p>
  
  <p>I was able to create this tag by syncing the entire branch to rev X, then "cd project1" and sync to rev Y, then "cd ..\project2" and sync to rev Z, then "cd .." and create the tag from the current directory.</p>
  
  <p>We would like to be able to create the tag from a single command line (and, without having to sync any files to our local workstation, by using URLs).  Is this possible?  We have tried several variants but none seemed to work.</p>
  
  <p>Thanks,<br>
  Ken</p>