<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><span>From talking with Patrick Strateman (phantomcircuit), he suggested this idea (which I will elaborate more on in the BIP):</span><div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"><div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"><div id="yiv1943267884"><div><div style="color:#000;background-color:#fff;font-family:times new roman, new york, times, serif;font-size:12pt;"><div><br><span></span></div><div><span>User-agent strings are a good starting point, however they aren't easy for parsing so we'll make a small modification to them.</span></div><div><br><span></span></div><div><span>We need a hierarchy from protocol, variant, gui, flavour,
 build</span></div><div><span><br></span></div><div><span>/Satoshi:314700/bitcoin-qt:0.4/</span></div><div><br><span></span></div><div><span>How does that sound? In BitcoinJ's case:</span></div><div><br><span></span></div><div><span>/BitcoinJ:0.2/AndroidBuild:0.8/</span></div><div><br><span></span></div><div><span>Thoughts:</span></div><div><br><span></span></div><div><span>- Do we need a freely defined comments
 field?</span></div><div><br><span></span></div><div><span>/BitcoinJ:0.2[iPad; U; CPU OS 3_2_1]/AndroidBuild:0.8/</span></div><div><span>/Satoshi:314700/bitcoin-qt:0.4[Ubuntu Oneiric]/<br></span></div><div><br></div><div style="font-family:times new roman, new york, times, serif;font-size:12pt;"><div style="font-family:times new roman, new york, times, serif;font-size:12pt;"><font face="Arial" size="2"><hr size="1"><b><span style="font-weight:bold;">From:</span></b> Christian Decker &lt;decker.christian@gmail.com&gt;<br><b><span style="font-weight:bold;">To:</span></b> Mike Hearn &lt;mike@plan99.net&gt;<br><b><span style="font-weight:bold;">Cc:</span></b> Amir Taaki &lt;zgenjix@yahoo.com&gt;; "bitcoin-development@lists.sourceforge.net" &lt;bitcoin-development@lists.sourceforge.net&gt;<br><b><span style="font-weight:bold;">Sent:</span></b> Saturday, November 5, 2011 2:45 PM<br><b><span style="font-weight:bold;">Subject:</span></b> Re:
 [Bitcoin-development] Lock protocol version numbers<br></font><br>
<div id="yiv1943267884">On BitDroid I stopped updating the protocol version at 31700 and set the string to be both Version and Client, just like BitcoinJ :-)<br><br><div class="yiv1943267884gmail_quote">On Sat, Nov 5, 2011 at 3:32 PM, Mike Hearn <span dir="ltr">&lt;<a rel="nofollow" ymailto="mailto:mike@plan99.net" target="_blank" href="mailto:mike@plan99.net">mike@plan99.net</a>&gt;</span> wrote:<br>

<blockquote class="yiv1943267884gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">BitCoinJ already sets the subver field to its name and version.<br><br>
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