+* `path` -- uses the value of the _n_th component of the URL path, as specified by the value. For example
+`!path!3` will auto-search for the word "dinosaur" if the page containing that widget is
+invoked from the URL `http://example.com/magic/lookup/dinosaur`
+
+* `var` -- uses the value of the named JavaScript global variable. This is a very powerful and general mechanism. For example, to
+ search for the reversed value of the query parameter called `reverseTerm`, you might write a JavaScript function to do the
+ extraction and reversing, the use the HTML:
+
+<!--- Due to a bug in pandoc, we need this comment to force the following code-block to be recognised -->
+
+ <script>var _reversedParam = extractAndReverse("term");</script>
+ <div class="mkws-results" autosearch="!var!_reversedParam">