Going on exploring the same idea, here an update. I posted it into en.source
scriptorium, but I think better to post it here too a copy of my
contribution.
Template-generated Dublin Core metadata
We are going on testng (both into it.source and vec.source) a very simple
syntax to inject well-formed Dublin core metadata into html of our ns0
pages. The trick is, to add inside our versions of header templates
somethink like this:
vec.source version:
<pre><span
class="metadata"><dc:title>{{{titolo|}}}</dc:title></span>
<span class="metadata"><dc:creator
opt:role="aut">{{{autor|Anonimo}}}</dc:creator></span>
(..other..)
</pre>
it.source version:
<pre><span
class="metadata"><dc:title>{{{Titolo|}}}</dc:title></span>
<span class="metadata"><dc:creator
opt:role="aut">{{{{{#ifeq:{{lc:{{{Progetto|}}}}}|diritto|Organismo
emittente|Nome e cognome
dell'autore}}|Anonimo}}}</dc:creator></span></pre>
As you guess, data are managed in different ways and formats from header
templates of vec.source and it.source, but they produce an identical Dublin
Core code.
Obviously there's a span.metadata {display:none} directive into both
Common.css files, so that such data are completely hidden; nevertheless they
can be easily found and used parsing the html of the page by a js script or
a bot script. This means, that good, well-formatted Dublin core metadata can
be added into any ns0 wikisource page of any language, without any user
work, without any extension, with a extremely low server load (almost
nothing!), producing a shared, identical set of metadata from any wikisource
project perfectly machine-usable; i.e. what's needed as a basic step to
build good epub version of source works, but many other applications can be
thought
Alex brollo