Use of variables in XSLT

Why do I have to use the variables in my XSLT stylesheet in at least three
different ways?
Assuming I have declared my variable as
<xsl:variable name="type" select="one" />

I some where must refer to is as:

1. <xsl:value-of select="$type"/>

somewhere else as

2. {$type}

and somewhere as

3. $type

regards
Kaarle Kaila

--
Kaarle Kaila
email: kaarle dot kaila at iki dot fi
www.iki.fi/kaila


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