Spaces

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I'm customizing the footer and header of my document, so, I want my name to be 
in some footers, so, I put this:
<xsl:value-of select="ancestor-or-self::book/bookinfo/author/firstname"/>
<xsl:value-of select="ancestor-or-self::book/bookinfo/author/othername"/>
<xsl:value-of select="ancestor-or-self::book/bookinfo/author/surname"/>
The problem is that there's no white (blank) space between the data of each 
tag. How do I put a white space between them ?
Thank.
- -- 
Pupeno:  - http://www.pupeno.com
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