I'm looking for a succinct and well-written tutorial on using svn:externals.
I already know how to use them in a basic way myself, but I want a good article that I can link to when answering questions like this one that come up recently:
What to do with multiple projects depending on the same source?
I'd do it myself, but I don't use them often enough to want to stick my neck out and write a tutorial on it. Google was surprisingly unhelpful with this topic.
Here are some sections about it in the svnbook / TortoiseSVN manual:
This is the svnbook page on svn:externals. It is the most useful resource on the subject.
This one explains four ways to include sub-projects in the workflow (and in the process misses a fifth one: symlinks).
And this last one is a TortoiseSVN-specific page on how to import stuff in a repository (not directly related to svn:externals).