Cache directory tagging proposal follow-up

[Bryan Ford]

Dear XDG folks,

I've been talking privately with the developers of various caching and 
backup/archival applications about the cache directory tagging proposal I 
brought up earlier - again, it's currently at:

	http://www.brynosaurus.com/cachedir/

I've been getting mostly positive feedback, along with a few good suggestions.  
I've added an Application Support Status section to the page above listing 
pointers to the projects I've contacted (and those who have expressed at 
least tentative support - i.e., a "sure, sounds good, let us know when it's 
ready").

One technical issue that a few people brought up is whether the tag filename 
(currently ".IsCacheDirectory") should be shortened to be compatible with 
older POSIX systems with a 14-character filename limitation, or even old 
MS-DOS-based systems with the 8.3 limitation.  My reasoning for using the 
longer name was that it would reduce the chance of accidental name 
collisions, and it didn't seem too likely that very old systems would benefit 
much from this proposal anyway since they mostly run very old applications.  
But since it seems to be a persistent concern, I thought I'd bring it up 
here.  I'm perfectly willing to change the name to "iscache.dir" or 
"cachedir.tag" or something like that if people think that would be better.

Another enhancement I've already made to the latest version of the proposal is 
to recommend that caching apps include a comment in their cache tags 
referring back to the proposal itself.  For example, a typical cache tag 
might look like this:

	Signature: 8a477f597d28d172789f06886806bc55
	# This file is a cache directory tag created by (application name).
	# For information about cache directory tags, see:
	#	http://www.brynosaurus.com/cachedir/

That way someone who happens to look at a cache tag, or at the source code of 
an application that writes them, will have a better indication of what they 
are.  But this obviously brings up the question of where the proposal should 
"live", since it's now at least in a weak sense "written into the spec".  I'm 
perfectly happy to keep hosting it on my personal site, but would it be more 
appropriate to move it to freedesktop.org at this point?

Thanks,
Bryan