+The optional `among` parameter limits the pages whose outgoing links are
+considered. For instance, to display a cloud of tags used on blog
+entries, while ignoring other pages that use those tags, you could use:
+
+ \[[!pagestats pages="tags/*" among="blog/posts/*"]]
+
+Or to display a cloud of tags related to Linux, you could use:
+
+ \[[!pagestats pages="tags/* and not tags/linux" among="tagged(linux)"]]
+