clarification

git-svn-id: file:///home/ksmith/gitmigration/svn/xmpp/trunk@3543 4b5297f7-1745-476d-ba37-a9c6900126ab
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Peter Saint-Andre 2009-10-16 04:39:30 +00:00
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commit 33e231d0ea
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<section1 topic='Business Rules' anchor='bizrules'>
<p>The following business rules apply:</p>
<ol start='1'>
<li>TXT lookups MUST be used only as a fallback after the methods specified in <cite>RFC 3920</cite> have been exhausted.</li>
<li>TXT lookups MUST be used only as a fallback after the methods specified in <cite>RFC 3920</cite> have been exhausted. <note>The point of this rule is to prevent someone from defining a new XEP-0156 connection method like "_xmpp-client-tcp" to override the SRV records defined in the core XMPP specification.</note></li>
<li>A domain SHOULD NOT present information in DNS TXT records that is available via the DNS SRV records defined in <cite>RFC 3920</cite>.</li>
<li>The order of DNS TXT records SHOULD NOT be interpreted as significant by the presenting domain or the receiving entity.</li>
</ol>
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<section1 topic='Examples' anchor='examples'>
<p>The following examples show two DNS TXT resource records: the first indicates support for the XMPP Over BOSH connection method defined in <cite>XEP-0124</cite> and <cite>XEP-0206</cite> and the second indicates support for WAP connections (the latter connection method is not yet defined).</p>
<example caption='TXT Resource Records'><![CDATA[
_xmppconnect IN TXT "_xmpp-client-xbosh=https://web.jabber.org:8080/bind.cgi"
_xmppconnect IN TXT "_xmpp-client-wap=http://wap.jabber.org/connector.cgi"
_xmppconnect IN TXT "_xmpp-client-xbosh=https://bosh.jabber.org:5280/bind"
_xmppconnect IN TXT "_xmpp-client-wap=http://wap.jabber.org/connector"
]]></example>
</section1>
<section1 topic='Security Considerations' anchor='security'>