alt

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C 元素

<alt>

<alt> (alternation) identifies an alternation or a set of choices among elements or passages. 16.8 Alternation

組件 linking — 16 Linking, Segmentation, and Alignment

屬性

att.pointing (@type, @evaluate)

targets

specifies the identifiers of the alternative elements or passages.

狀態	必備的
資料類型	2–∞ occurrences of <rng:ref name="data.pointer"/> data.pointer 以空白鍵隔開
值	Each value specified must be the same as that specified as value for an xml:id attribute for some other element in the current document.

mode

states whether the alternations gathered in this collection are exclusive or inclusive.

狀態	推薦的
合法的值是:	excl (exclusive) indicates that the alternation is exclusive, i.e. that at most one of the alternatives occurs. incl (inclusive) indicates that the alternation is not exclusive, i.e. that one or more of the alternatives occur.

weights

If mode is excl, each weight states the probability that the corresponding alternative occurs. If mode is incl each weight states the probability that the corresponding alternative occurs given that at least one of the other alternatives occurs.

狀態	非必備的
資料類型	1–∞ occurrences of <rng:ref name="data.probability"/> data.probability 以空白鍵隔開
值	a whitespace-separated list of probability values in the range from 0 to 1.
註	If mode is `excl`, the sum of weights must be 1. If mode is `incl`, the sum of weights must be in the range from 0 to the number of alternants.

屬於 altGrp model.global.meta

可包含空白元素

宣告


<rng:element name="alt">
<rng:ref name="att.global.attributes"/>
<rng:ref name="att.pointing.attributes"/>
<rng:attribute name="targets">
 <rng:list>
  <rng:ref name="data.pointer"/>
  <rng:oneOrMore>
   <rng:ref name="data.pointer"/>
  </rng:oneOrMore>
 </rng:list>
</rng:attribute>
<rng:optional>
 <rng:attribute name="mode">
  <rng:choice>
   <rng:value>excl</rng:value>
   <rng:value>incl</rng:value>
  </rng:choice>
 </rng:attribute>
</rng:optional>
<rng:optional>
 <rng:attribute name="weights">
  <rng:list>
   <rng:oneOrMore>
    <rng:ref name="data.probability"/>
   </rng:oneOrMore>
  </rng:list>
 </rng:attribute>
</rng:optional>
<rng:empty/>
</rng:element>

element alt
{
   att.global.attributes,
   att.pointing.attributes,
   attribute targets { list { data.pointer, data.pointer+ } },
   attribute mode { "excl" | "incl" }?,
   attribute weights { list { data.probability+ } }?,
   empty
}

例子

P5: TEI指引

<alt>