* Simon St.Laurent wrote:
>I know I could write this myself, but suspect someone else has already
>done a better job of it - and I just don't know the right Google
>keywords to summon it.

>
>I'm looking for a tool that I can feed an XML document, and it will tell
>me which element names were used in the document.
>

>Attributes used on those elements would be a bonus, as would a frequency
>count for usage, but mostly I'm just trying to survey a collection of
>(DocBook) documents quickly.

As this is turning into a rosetta code excercise,

let me throw in C#:

 var elems = XDocument.Load(path).Root.DescendantsAndSelf();
 var attrs = elems.Attributes()
   .GroupBy(x => new { Attr = x.Name, Elem = http://x.Parent.Name });

 foreach (var elem in elems.GroupBy(x => x.Name))
   Console.WriteLine("{0} {1}", elem.Count(), elem.Key);

 Console.WriteLine();

 foreach (var attr in attrs)
   Console.WriteLine("{0} {1}/@{2}", attr.Count(),
     attr.Key.Elem, attr.Key.Attr);

Though it would seem the GNU-ish way to solve this would be having a
tool that prints out all the element names and attribute/element paths
and then use, say, `sort | uniq -c` on it.