I've just looked at the xdxf-article. It is definitely not filtered.
Code:
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<head><k>leerling</k></head><def><p><span style="font-weight:bold;">leerling</span> <span style="font-style:italic;">(</span><span style="font-style:italic;">de</span><sup>m</sup><span style="font-style:italic;">)</span><span style="font-weight:bold;">, </span><span style="font-weight:bold;">leerlinge</span>*<span style="font-style:italic;">(</span><span style="font-style:italic;">de</span><sup>v</sup><span style="font-style:italic;">)</span><br/>1. <span style="font-style:italic;">scholier(e)</span><br/><span style="font-weight:bold;">élève</span><span style="font-style:italic;"> (</span><span style="font-style:italic;">m. of v.</span><span style="font-style:italic;">)</span><br/><span style="font-style:italic;">(</span><span style="font-style:italic;">lagere school</span><span style="font-style:italic;">)</span>*<span style="font-style:italic;">(</span><span style="font-style:italic;">man</span><span style="font-style:italic;">) </span><span style="font-weight:bold;">écolier</span><span style="font-style:italic;"> (</span><span style="font-style:italic;">m.</span><span style="font-style:italic;">)</span>, <span style="font-style:italic;">(</span><span style="font-style:italic;">vrouw</span><span style="font-style:italic;">) </span><span style="font-weight:bold;">écolière</span><span style="font-style:italic;"> (</span><span style="font-style:italic;">v.</span><span style="font-style:italic;">)</span><br/><span style="font-style:italic;">(</span><span style="font-style:italic;">middelbare school</span><span style="font-style:italic;">)</span>*<span style="font-style:italic;">(</span><span style="font-style:italic;">man</span><span style="font-style:italic;">) </span><span style="font-weight:bold;">collégien</span><span style="font-style:italic;"> (</span><span style="font-style:italic;">m.</span><span style="font-style:italic;">)</span>, <span style="font-style:italic;">(</span><span style="font-style:italic;">vrouw</span><span style="font-style:italic;">) </span><span style="font-weight:bold;">collégienne</span><span style="font-style:italic;"> (</span><span style="font-style:italic;">v.</span><span style="font-style:italic;">)</span><br/><span style="font-style:italic;">(</span><span style="font-style:italic;">man</span><span style="font-style:italic;">) </span>lycéen<span style="font-style:italic;"> (</span><span style="font-style:italic;">m.</span><span style="font-style:italic;">)</span>, <span style="font-style:italic;">(</span><span style="font-style:italic;">vrouw</span><span style="font-style:italic;">) </span>lycéenne<span style="font-style:italic;"> (</span><span style="font-style:italic;">v.</span><span style="font-style:italic;">)</span>*<br/>♦ voorbeelden<br/>een briljante leerling<br/><span style="color:#472565;">un brillant sujet, un sujet d'élite</span>*<br/>een externe, niet-inwonende leerling<br/><span style="color:#472565;">un(e) externe</span>*<br/>een interne, inwonende leerling<br/><span style="color:#472565;">un(e) interne</span>*<br/>de nieuwe leerlingen<br/><span style="color:#472565;">les élèves qui entrent, de 1ère année</span>*<br/>een zwakke, trage, middelmatige leerling<br/><span style="color:#472565;">un élève médiocre, lent, moyen</span>*<br/>de zwakste leerling van de klas<br/><span style="color:#472565;">le dernier de la classe</span><br/><span style="font-style:italic;">(</span><span style="font-style:italic;">figuurlijk</span><span style="font-style:italic;">)</span>*<span style="color:#472565;">le mauvais élève</span>*<br/>2. <span style="font-style:italic;">volgeling</span><br/><span style="font-weight:bold;">élève</span><span style="font-style:italic;"> (</span><span style="font-style:italic;">m. of v.</span><span style="font-style:italic;">)</span><br/>disciple<span style="font-style:italic;"> (</span><span style="font-style:italic;">m. of v.</span><span style="font-style:italic;">)</span>*<br/>♦ voorbeelden<br/><span style="font-style:italic;">(</span><span style="font-style:italic;">Bijbel</span><span style="font-style:italic;">)</span>*de leerlingen van Jezus<br/><span style="color:#472565;">les disciples de Jésus</span>*<br/>3. <span style="font-style:italic;">aspirant(-)</span><br/><span style="font-weight:bold;">élève</span><span style="font-style:italic;"> (</span><span style="font-style:italic;">m. of v.</span><span style="font-style:italic;">)</span><br/><span style="font-style:italic;">(</span><span style="font-style:italic;">man</span><span style="font-style:italic;">) </span>apprenti<span style="font-style:italic;"> (</span><span style="font-style:italic;">m.</span><span style="font-style:italic;">)</span>, <span style="font-style:italic;">(</span><span style="font-style:italic;">vrouw</span><span style="font-style:italic;">) </span>apprentie<span style="font-style:italic;"> (</span><span style="font-style:italic;">v.</span><span style="font-style:italic;">)</span>*<br/>♦ voorbeelden<br/>een leerling-metselaar<br/><span style="color:#472565;">un apprenti maçon</span>*</p></def>
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After forcing the conversion it looks like this:
Code:
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<head><k>leerling</k></head><def><p><span style="font-weight:bold;">leerling</span> <span style="font-style:italic;">(</span><span style="font-style:italic;">de</span><sup>m</sup><span style="font-style:italic;">)</span><span style="font-weight:bold;">, </span><span style="font-weight:bold;">leerlinge</span>*<span style="font-style:italic;">(</span><span style="font-style:italic;">de</span><sup>v</sup><span style="font-style:italic;">)</span><br/>1. <span style="font-style:italic;">scholier(e)</span><br/><span style="font-weight:bold;">élève</span><span style="font-style:italic;"> (</span><span style="font-style:italic;">m. of v.</span><span style="font-style:italic;">)</span><br/><span style="font-style:italic;">(</span><span style="font-style:italic;">lagere school</span><span style="font-style:italic;">)</span>*<span style="font-style:italic;">(</span><span style="font-style:italic;">man</span><span style="font-style:italic;">) </span><span style="font-weight:bold;">écolier</span><span style="font-style:italic;"> (</span><span style="font-style:italic;">m.</span><span style="font-style:italic;">)</span>, <span style="font-style:italic;">(</span><span style="font-style:italic;">vrouw</span><span style="font-style:italic;">) </span><span style="font-weight:bold;">écolière</span><span style="font-style:italic;"> (</span><span style="font-style:italic;">v.</span><span style="font-style:italic;">)</span><br/><span style="font-style:italic;">(</span><span style="font-style:italic;">middelbare school</span><span style="font-style:italic;">)</span>*<span style="font-style:italic;">(</span><span style="font-style:italic;">man</span><span style="font-style:italic;">) </span><span style="font-weight:bold;">collégien</span><span style="font-style:italic;"> (</span><span style="font-style:italic;">m.</span><span style="font-style:italic;">)</span>, <span style="font-style:italic;">(</span><span style="font-style:italic;">vrouw</span><span style="font-style:italic;">) </span><span style="font-weight:bold;">collégienne</span><span style="font-style:italic;"> (</span><span style="font-style:italic;">v.</span><span style="font-style:italic;">)</span><br/><span style="font-style:italic;">(</span><span style="font-style:italic;">man</span><span style="font-style:italic;">) </span>lycéen<span style="font-style:italic;"> (</span><span style="font-style:italic;">m.</span><span style="font-style:italic;">)</span>, <span style="font-style:italic;">(</span><span style="font-style:italic;">vrouw</span><span style="font-style:italic;">) </span>lycéenne<span style="font-style:italic;"> (</span><span style="font-style:italic;">v.</span><span style="font-style:italic;">)</span>*<br/>♦ voorbeelden<br/>een briljante leerling<br/><span style="color:#472565;">un brillant sujet, un sujet d'élite</span>*<br/>een externe, niet-inwonende leerling<br/><span style="color:#472565;">un(e) externe</span>*<br/>een interne, inwonende leerling<br/><span style="color:#472565;">un(e) interne</span>*<br/>de nieuwe leerlingen<br/><span style="color:#472565;">les élèves qui entrent, de 1ère année</span>*<br/>een zwakke, trage, middelmatige leerling<br/><span style="color:#472565;">un élève médiocre, lent, moyen</span>*<br/>de zwakste leerling van de klas<br/>
<span style="color:#472565;">le dernier de la classe</span><br/><span style="font-style:italic;">(</span><span style="font-style:italic;">figuurlijk</span><span style="font-style:italic;">)</span>*<span style="color:#472565;">le mauvais élève</span>*<br/>2. <span style="font-style:italic;">volgeling</span><br/><span style="font-weight:bold;">élève</span><span style="font-style:italic;"> (</span><span style="font-style:italic;">m. of v.</span><span style="font-style:italic;">)</span><br/>disciple<span style="font-style:italic;"> (</span><span style="font-style:italic;">m. of v.</span><span style="font-style:italic;">)</span>*<br/>♦ voorbeelden<br/><span style="font-style:italic;">(</span><span style="font-style:italic;">Bijbel</span><span style="font-style:italic;">)</span>*de leerlingen van Jezus<br/><span style="color:#472565;">les disciples de Jésus</span>*<br/>3. <span style="font-style:italic;">aspirant(-)</span><br/><span style="font-weight:bold;">élève</span><span style="font-style:italic;"> (</span><span style="font-style:italic;">m. of v.</span><span style="font-style:italic;">)</span><br/><span style="font-style:italic;">(</span><span style="font-style:italic;">man</span><span style="font-style:italic;">) </span>apprenti<span style="font-style:italic;"> (</span><span style="font-style:italic;">m.</span><span style="font-style:italic;">)</span>, <span style="font-style:italic;">(</span><span style="font-style:italic;">vrouw</span><span style="font-style:italic;">) </span>apprentie<span style="font-style:italic;"> (</span><span style="font-style:italic;">v.</span><span style="font-style:italic;">)</span>*<br/>♦ voorbeelden<br/>een leerling-metselaar<br/><span style="color:#472565;">un apprenti maçon</span>*</p></def>
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And the coding agrees that '♦' is a diamond. (As does this forum, that upon saving this post converts '&# 9830;' immediately to '♦'.)