determining number of tags in xsl

[persiankamran]

folks i have the following xml file

<?xml version="1.0" version="utf-8"?> 
<main>
 <book>
 <author>A1</author> 
<author>A2</author> 
<year>2000</year>
 </book> 

<book> 
<author>b1</author>
 <author>b2</author>
 <author>b3</author>
 <year>2001</year>
 </book>

 </main>

Now i want to transform it using XSL but problem is, in some book tags, number of authors is 2, in other number of authors is 3... how can i do in XSL so that i dont have to hardcoat it e-g

<xsl:for-each select="main/book"> <xsl:sort select="year"/> <p>Author::<xsl:value-of select="author"/></p> <p>Year::<xsl:value-of select="year"/></p>

The above code returns the first author only.. if i do

<p>Author::<xsl:value-of select="author[1]"/></p> <p>Author::<xsl:value-of select="author[2]"/></p> <p>Author::<xsl:value-of select="author[3]"/></p>

It becomes hardcoated and rong as well since some books have 3 authors and some have 2,.. is there any way to do it better?

[Dormilich]

in this case XPath axes are a valuable means

<xsl:for-each select="main/book">
  <xsl:sort select="year"/>
  <xsl:for-each select="child::author">
    <p>Author::<xsl:value-of select="."/></p>
  </xsl:for-each>
  <p>Year::<xsl:value-of select="year"/></p>
</xsl:for-each>