Detailed analysis of text keys

Currently when I use the RSS feed to view content over the whole category (as described here) the title and description show the literal value rss.livelink.threads-in-node. This text key doesn't exist in our community, though scoped variations of it do (e.g. rss.livelink.threads-in-node@place:board). I would like to be able to display the text dynamically so that it would say something like "New topics in Category Name" where "Category Name" is replaced with the actual name of the category identified in the URL.

I see some values in the text editor like this:

rss.livelink.threads-in-node@place:board           = New ${general.board} ${general.threads} in {0}

I assume that this @place:board is a scoping similar to what is indicated here, but it does have a different syntax so I am not sure if that is due to version differences between what was documented in that post and the current release (14.4) or something else (I suspect it's something else).

Also, is it the case that the {0} refers to the value of the scoped place (in this case @place:board)? For example, if I use the following, will it give me what I'm after (which is "New topics in Category Name?", assuming that the value of ${general.threads} = topics)?

rss.livelink.threads-in-node@place:category           = New ${general.threads} in {0}