key
XSLT <xsl:key> elementi
❮ To‘liq XSLT elementlari ma’lumotnomasi
Ta’rif va qo‘llanilishi
<xsl:key> elementi uslublar jadvalida key() funksiyasi bilan ishlatilishi mumkin bo‘lgan nomlangan kalitni e’lon qiluvchi yuqori darajadagi elementdir.
Eslatma: Kalit noyob bo‘lishi shart emas!
Sintaksis
<xsl:key
name="name"
match="pattern"
use="expression"/>Atributlar
| Atribut | Qiymat | Tavsif |
|---|---|---|
| name | name | Majburiy. Kalit nomini belgilaydi |
| match | pattern | Majburiy. Kalit qo‘llaniladigan tugunlarni belgilaydi |
| use | expression | Majburiy. Har bir tugun uchun kalit qiymati |
1-misol
Faraz qilaylik, sizda "persons.xml" nomli XML fayl bor:
<persons>
<person name="Tarzan" id="050676"/>
<person name="Donald" id="070754"/>
<person name="Dolly" id="231256"/>
</persons>XSL faylda kalitni quyidagicha aniqlashingiz mumkin:
<xsl:key name="preg" match="person" use="@id"/>id="050676" bo‘lgan shaxsni topish uchun (XSL faylda) quyidagini yozing:
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:key name="preg" match="person" use="@id"/>
<xsl:template match="/">
<html>
<body>
<xsl:for-each select="key('preg','050676')">
<p>
Id: <xsl:value-of select="@id"/><br />
Name: <xsl:value-of select="@name"/>
</p>
</xsl:for-each>
</body>
</html>
</xsl:template>
</xsl:stylesheet>❮ To‘liq XSLT elementlari ma’lumotnomasi
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