Specifically I am interested for the LAMP Stack and some of the best practices to use this for various builds.
+1
A:
'export' and 'tag' are two very different concepts in SVN. Tags are basically just copies of the project at a particular point in time; as far as the Subversion software knows they are just folders. 'export' on the other hand is an operation supported by the client software, which creates a copy of a directory from the repository without the SVN metadata needed for a working directory.
I'd recommend reading over the Red Book, especially the sections on repository layout and tagging.
David Winslow
2009-05-30 16:44:12