dfdl:initiator=&quot;Message-ID Message-Id&quot;<br><br>i.e., it&#39;s a whitespace separated list of alternatives.<br><br>There&#39;s also a property called dfdl:ignoreCase=&quot;yes&quot;, but that would allow &quot;mEssAge-iD&quot; as well, which you probably don&#39;t want.<br>
<br><div class="gmail_quote">On Wed, Feb 27, 2013 at 12:48 PM, Garriss Jr., James P. <span dir="ltr">&lt;<a href="mailto:jgarriss@mitre.org" target="_blank">jgarriss@mitre.org</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">






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<p class="MsoNormal"><span style="font-size:12.0pt">Consider the following IMF headers:<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Message-ID: &lt;<a href="mailto:CACQ76nh2VDypuwm1aHc1-s8ZmmyXg8XEosS6af6yurkVdT%2B8QQ@mail.gmail.com" target="_blank">CACQ76nh2VDypuwm1aHc1-s8ZmmyXg8XEosS6af6yurkVdT+8QQ@mail.gmail.com</a>&gt;<u></u><u></u></span></p>

<p class="MsoNormal"><span style="font-size:12.0pt">Message-Id: &lt;<a href="mailto:208E8372-A9D9-468A-9B4B-BD97ED28F64C@garriss.org" target="_blank">208E8372-A9D9-468A-9B4B-BD97ED28F64C@garriss.org</a>&gt;<u></u><u></u></span></p>

<p class="MsoNormal"><span style="font-size:12.0pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Notice the difference:  <u></u>
<u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">    Message-ID: <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">    vs <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">    Message-Id:<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Per the RFC, only the first is legal, but both are used in practice, and we’d like to allow either.  In our DFDL schema, “Message-ID” is an initiator, but suddenly we have two alternate initiators for the
 same element.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">How we model this in DFDL?<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">TIA<u></u><u></u></span></p>
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<br>--<br>
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  <a href="https://www.ogf.org/mailman/listinfo/dfdl-wg" target="_blank">https://www.ogf.org/mailman/listinfo/dfdl-wg</a><br></blockquote></div><br><br clear="all"><br>-- <br>Mike Beckerle | OGF <span>DFDL</span> Workgroup Co-<span>Chair</span> | Tresys Technology | <a href="http://www.tresys.com" target="_blank">www.tresys.com</a><br>
<br>