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git-svn-id: file:///home/ksmith/gitmigration/svn/xmpp/trunk@2997 4b5297f7-1745-476d-ba37-a9c6900126ab
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Peter Saint-Andre 2009-04-06 03:39:23 +00:00
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xep-0239.xml
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@ -74,7 +74,7 @@
<p>This is an obvious improvement over the traditional representation.</p>
<p>It might be objected that the Binary XMPP representation requires a large number of XML elements. However, because all data is represented using only &lt;zero/&gt; and &lt;one/&gt;, the protocol can be significantly compressed using the standard ZLIB compression algorithm as defined in &rfc1950;, which SHOULD be enabled by default on the bxmpp port. Evidence from preliminary testing indicates that compression of Binary XMPP results in a representation less than 2% of the original size!</p>
<p>As a further simplification, Binary XMPP gets rid of the complicated stream negotiation process defined in RFC 3920. Instead, if a server supports Binary XMPP it advertises a special DNS SRV record _bxmpp._tcp in accordance with &rfc2782;. Furthermore, only one record is needed, thus saving precious port space. The RECOMMENDED port for Binary XMPP communication is 10110, but any port MAY be used.</p>
<p>To start a Binary XMPP stream, the sender simply connects via TCP at the advertised port and starts sending &lt;zero/&gt; and &lt;one/&gt; elements. The lack of a stream header simplifies XML parsing, introducing further performance improvemnets.</p>
<p>To start a Binary XMPP stream, the sender simply connects via TCP at the advertised port and starts sending &lt;zero/&gt; and &lt;one/&gt; elements. The lack of a stream header simplifies XML parsing, introducing further performance improvements.</p>
</section1>
<section1 topic='Examples' anchor='examples'>
<p>The following examples showcase the tremendous efficiency of Binary XMPP using a complete session between a client and a server.</p>