title: confusion about spring webflow execution key, what's the semantics behind
body: <p>Recently, I looked at spring 2.3 webflow booking-faces demo, I found it strange that a different flow execution key is assigned every time I click to "browse" hotel detail.</p>
  
  <p>When I search the hotels and page to the 5th page of the search result, I get an URL with <code>execution=e1s2</code>. Then I click to browse a hotel detail, I get an URL with <code>execution=e1s3</code>. But when I click the <em>"back to search"</em> button, I found the page is directed to the first page of the search list with an <code>execution=e1s4</code> URL, and the paging state is missed. However, browsing step is defined in the same flow definition with hotel search act and paging var is defined within flow scope.</p>
  
  <p>My question is whether a new execution key parameter means a new flow execution? What's the semantics? If so, How can I configure to stick into an identical flow execution when I click "back to search" button. </p>
  
  <p>Thanks</p>