This is not the responsibility only of the author, but the publisher as well.
inkscape bug filed: https://bugs.launchpad.net/inkscape/+bug/209199
According to the SVG specification:
Authors should always provide a 'title' child element to the outermost 'svg' element within a stand-alone SVG document.
according to a recent grep search of over 6000 openclipart images only around 6 had titles.
titles are a critical requirement for accessibility similar to alt in html.
http://iconomy.org for a demonstration of their use.
not sure what checks are already included by openclipart, however this SVG validator checks for w3c validation, inclusion of title and other requirements, before registering on the database.
also filed as bug with W3 validator:
Created attachment 15641 [details]
update with title and SVG1.2 checks
Created attachment 15642 [details] [review]
also with copyright...
the check for title now needs to be tied into ccHost to advise the user if there is no title on upload
Closing all openclipart bugs as openclipart is now on launchpad, as per request from Jon Philips.