<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">I have written up a short document[1] on initial support for aggregate metrics. Thanks in advance for any feedback.<div class=""><br class=""></div><div class="">[1] <a href="http://bit.ly/1BAfF8d" class="">http://bit.ly/1BAfF8d</a></div><div class=""><br class=""></div><div class="">- John</div></body></html>