<taxonomy>

<taxonomy> 定義文件分類的類型學，可以是潛在地以書目資料的方式，或是明確地以結構分類法的方式來分類。 [2.3.7 The Classification Declaration]
組件header — The TEI Header
屬性att.global (@xml:id, @n, @xml:lang, @xml:base, @xml:space) (att.global.rendition (@rend, @style, @rendition)) (att.global.linking (@corresp, @synch, @sameAs, @copyOf, @next, @prev, @exclude, @select)) (att.global.analytic (@ana)) (att.global.facs (@facs)) (att.global.change (@change)) (att.global.responsibility (@cert, @resp))
可包含在於
header: classDecl
可包含
core: bibl biblStruct desc gloss listBibl
header: biblFull category
msdescription: msDesc
tagdocs: altIdent equiv
宣告

<rng:element name="taxonomy">
 <rng:ref name="att.global.attributes"/>
 <rng:ref name="att.global.rendition.attributes"/>
 <rng:ref name="att.global.linking.attributes"/>
 <rng:ref name="att.global.analytic.attributes"/>
 <rng:ref name="att.global.facs.attributes"/>
 <rng:ref name="att.global.change.attributes"/>
 <rng:ref name="att.global.responsibility.attributes"/>
 <rng:choice>
  <rng:zeroOrMore>
   <rng:choice>
    <rng:ref name="model.glossLike"/>
    <rng:ref name="model.descLike"/>
   </rng:choice>
  </rng:zeroOrMore>
  <rng:oneOrMore>
   <rng:ref name="category"/>
  </rng:oneOrMore>
  <rng:group>
   <rng:group>
    <rng:ref name="model.biblLike"/>
   </rng:group>
   <rng:zeroOrMore>
    <rng:ref name="category"/>
   </rng:zeroOrMore>
  </rng:group>
 </rng:choice>
</rng:element>
element taxonomy
{
   att.global.attributes,
   att.global.rendition.attributes,
   att.global.linking.attributes,
   att.global.analytic.attributes,
   att.global.facs.attributes,
   att.global.change.attributes,
   att.global.responsibility.attributes,
   (
      ( model.glossLike | model.descLike )*
    | category+
    | ( ( model.biblLike ), category* )
   )
}
例子
<taxonomy xml:id="zh-tw_tax.b">
 <bibl>布朗集</bibl>
 <category xml:id="zh-tw_tax.b.a">
  <catDesc>媒體採訪報導</catDesc>
  <category xml:id="zh-tw_tax.b.a1">
   <catDesc>日報</catDesc>
  </category>
  <category xml:id="zh-tw_tax.b.a2">
   <catDesc>週日</catDesc>
  </category>
  <category xml:id="zh-tw_tax.b.a3">
   <catDesc>全國性</catDesc>
  </category>
  <category xml:id="zh-tw_tax.b.a4">
   <catDesc>地方性</catDesc>
  </category>
  <category xml:id="zh-tw_tax.b.a5">
   <catDesc>政治</catDesc>
  </category>
  <category xml:id="zh-tw_tax.b.a6">
   <catDesc>體育</catDesc>
  </category>
 </category>
 <category xml:id="zh-tw_tax.b.d">
  <catDesc>宗教</catDesc>
  <category xml:id="zh-tw_tax.b.d1">
   <catDesc>藝文</catDesc>
  </category>
  <category xml:id="zh-tw_tax.b.d2">
   <catDesc>期刊與短文</catDesc>
  </category>
 </category>
</taxonomy>