<metDecl>

<metDecl> 在標記韻文時所用到的結構性元素 (例如lg、l、或seg) 當中，若使用met、real、或rhyme等屬性的屬性值來表示文章的韻律模式，則在此宣告標記韻律模式的方法。 6.5 Metrical Notation Declaration 6.3 Rhyme and Metrical Analysis
組件verse — 6 Verse
屬性 att.declarable (@default)
type指出該標記所傳達的為抽象韻律形式、實際韻律實踐、或者押韻形式，或任幾項之結合。
狀態 可應用時必備的
資料類型 1–3 occurrences of 

<rng:ref name="data.enumerated"/>
data.enumerated
以空白鍵隔開
合法的值是:
met
(屬性met) 屬性 met宣告適用於該屬性所紀錄的抽象韻律形式。屬性rhyme宣告適用於該屬性所紀錄的押韻形式
real
(屬性real) 屬性real宣告適用於該屬性所紀錄的通用韻律結構之實際實踐
rhyme
(rhyme attribute) declaration applies to the rhyme scheme recorded on the rhyme attribute
pattern (regular expression pattern) 標明一種固定表示法，用來定義任何合用於此標記的屬性值。
狀態 非必備的
資料類型 

<rng:ref name="data.pattern"/>
data.pattern
值 the value must be a valid regular expression per the World Wide Web Consortium's XML Schema Part 2: Datatypes Second Edition, Appendix F
屬於
model.encodingPart
可包含
core: note p
linking: ab
textcrit: witDetail
verse: metSym
宣告

<rng:element name="metDecl">
<rng:ref name="att.global.attributes"/>
<rng:ref name="att.declarable.attributes"/>
<rng:optional>
 <rng:attribute name="type" a:defaultValue="met real">
  <rng:list>
   <rng:choice>
    <rng:value>met</rng:value>
    <rng:value>real</rng:value>
    <rng:value>rhyme</rng:value>
   </rng:choice>
   <rng:optional>
    <rng:choice>
     <rng:value>met</rng:value>
     <rng:value>real</rng:value>
     <rng:value>rhyme</rng:value>
    </rng:choice>
   </rng:optional>
   <rng:optional>
    <rng:choice>
     <rng:value>met</rng:value>
     <rng:value>real</rng:value>
     <rng:value>rhyme</rng:value>
    </rng:choice>
   </rng:optional>
  </rng:list>
 </rng:attribute>
</rng:optional>
<rng:optional>
 <rng:attribute name="pattern">
  <rng:ref name="data.pattern"/>
 </rng:attribute>
</rng:optional>
<rng:choice>
 <rng:oneOrMore>
  <rng:choice>
   <rng:ref name="model.pLike"/>
   <rng:ref name="model.noteLike"/>
  </rng:choice>
 </rng:oneOrMore>
 <rng:oneOrMore>
  <rng:ref name="metSym"/>
 </rng:oneOrMore>
</rng:choice>
</rng:element>
element metDecl
{
   att.global.attributes,
   att.declarable.attributes,
   attribute type
   {
      list
      {
         ( "met" | "real" | "rhyme" ),
         ( "met" | "real" | "rhyme" )?,
         ( "met" | "real" | "rhyme" )?
      }
   }?,
   attribute pattern { data.pattern }?,
   ( ( model.pLike | model.noteLike )+ | metSym+ )
}
例子
<metDecl xml:id="zh-tw_ip" type="met" pattern="((SU|US)USUSUSUS/)">
 <metSym value="S">仄聲</metSym>
 <metSym value="U">平聲</metSym>
 <metSym value="/">詩行分界線</metSym>
</metDecl>