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<p class="MsoNormal">Hi,</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><span lang="EN-US">I’ve created my own extension of DITA. Amongst others I have added an element “predicate”, like this:</span></p>
<p class="MsoNormal"><span lang="EN-US"> <xs:element name="predicate"></span></p>
<p class="MsoNormal"><span lang="EN-US"> <xs:annotation></span></p>
<p class="MsoNormal"><span lang="EN-US"> <xs:documentation>A &lt;predicate> element marks the predicate, e.g. GROOT(Jan). (TP-ELEMENT)</xs:documentation></span></p>
<p class="MsoNormal"><span lang="EN-US"> </xs:annotation></span></p>
<p class="MsoNormal"><span lang="EN-US"> <xs:complexType></span></p>
<p class="MsoNormal"><span lang="EN-US"> <xs:complexContent></span></p>
<p class="MsoNormal"><span lang="EN-US"> <xs:extension base="predicate.class"></span></p>
<p class="MsoNormal"><span lang="EN-US"> <xs:attribute ref="class" default="- ling-d/pred "/></span></p>
<p class="MsoNormal"><span lang="EN-US"> </xs:extension></span></p>
<p class="MsoNormal"><span lang="EN-US"> </xs:complexContent></span></p>
<p class="MsoNormal"><span lang="EN-US"> </xs:complexType></span></p>
<p class="MsoNormal"><span lang="EN-US"> </xs:element></span></p>
<p class="MsoNormal"><span lang="EN-US"> <xs:complexType name="predicate.class" mixed="true"/></span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US">Now when I create a new ling topic, oXygen tells me
</span></p>
<p class="MsoNormal"><span lang="EN-US">E [Xerces] cos-nonambig: predicate and predicate (or elements from their substitution group) violate "Unique Particle Attribution". During validation against this schema, ambiguity would be created for those two particles.</span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US">My lingGrp.xsd contains:</span></p>
<p class="MsoNormal"><span lang="EN-US"> <xs:group name="predicate"></span></p>
<p class="MsoNormal"><span lang="EN-US"> <xs:sequence></span></p>
<p class="MsoNormal"><span lang="EN-US"> <xs:choice></span></p>
<p class="MsoNormal"><span lang="EN-US"> <xs:element ref="predicate" /></span></p>
<p class="MsoNormal"><span lang="EN-US"> </xs:choice></span></p>
<p class="MsoNormal"><span lang="EN-US"> </xs:sequence></span></p>
<p class="MsoNormal"><span lang="EN-US"> </xs:group></span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US">My lingDomain.xsd contains:</span></p>
<p class="MsoNormal"><span lang="EN-US"> <xs:group name="ling-d-pred"></span></p>
<p class="MsoNormal"><span lang="EN-US"> <xs:choice></span></p>
<p class="MsoNormal"><span lang="EN-US"> <xs:group ref="predicate" /></span></p>
<p class="MsoNormal"><span lang="EN-US"> </xs:choice></span></p>
<p class="MsoNormal"><span lang="EN-US"> </xs:group></span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US">And my ling.xsd contains:</span></p>
<p class="MsoNormal"><span lang="EN-US"> <xs:group ref="ling-d-pred" /></span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:9.0pt; font-family:"Arial","sans-serif"">No other references are made to predicate.</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:9.0pt; font-family:"Arial","sans-serif"">What am I doing wrong?</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:9.0pt; font-family:"Arial","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:9.0pt; font-family:"Arial","sans-serif"">Kind regards,</span></p>
<p class="MsoNormal"><span style="font-size:9.0pt; font-family:"Arial","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:9.0pt; font-family:"Arial","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:9.0pt; font-family:"Arial","sans-serif"">Ing. Roderik Dernison<br>
<br>
</span><span style="font-size:8.5pt; font-family:"Arial","sans-serif"; color:gray"></span></p>
<p class="MsoNormal"> </p>
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