<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Dec 5, 2017, at 4:02 PM, Nathaniel Smith <<a href="mailto:njs@pobox.com" class="">njs@pobox.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">I haven't followed this so sorry if this is an annoying comment, but having read this description I still don't really understand what Provides-Extra is doing. Don't packages already include extra information? What problem motivated this?</span></div></blockquote></div><br class=""><div class=""><br class=""></div><div class="">I’m pretty sure this field is literally what wheel already does. <a href="https://packaging.python.org/specifications/core-metadata/#provides-extra-optional-multiple-use" class="">https://packaging.python.org/specifications/core-metadata/#provides-extra-optional-multiple-use</a></div></body></html>