你可以使用 xsl:choose 语句，类似于常用编程语言中的 switch :

You can use xsl:choose statement, it's something like switch in common programming languages:

示例:

<xsl:variable name="variable_name">
  <xsl:for-each select="product/attributes">
  <xsl:choose>
    <xsl:when test="@attributename='A'">
      1
    </xsl:when>
    <xsl:when test=" @attributename='B'">
      1
    </xsl:when>
    <!--... add other options here-->
    <xsl:otherwise>1</xsl:otherwise>
  </xsl:choose>
  </xsl:for-each>
</xsl:variable> 

这将设置名为 variable_name 的新变量，其值为 product/attributes.

This will set new variable with name variable_name with the value of attribute product/attributes.

欲了解更多信息...http://www.w3schools.comwww.w3schools.com/xsl/el_choose.asp

OP 要求的另一种方式(有点脏):

And another way (a little dirty) by OP's request:

<xsl:variable name="variable_name">
  <xsl:for-each select="product/attributes">
    <xsl:if test="contains(text(), 'A') or contains(text(), 'B')">
       1
    </xsl:if>
  </xsl:for-each>
</xsl:variable> 

如果您提供用于编写​​ xslt 的 xml，将会很有帮助.

It will be helpful if you provide the xml you're writing your xslt against.