> <p>Some body <b>text</b> some more</p>
>
> And I want to replace the word 'body' only in the text of <p> but ignore
> text in <b> so I've been looking at something like this:
>
> <xsl:template match="p">
>   <p>
>        <xsl:value-of select="substring-before(./text(), 'body')"/>
>        <xsl:value-of select="'replace_body'"/>
>        <xsl:value-of select="substring-after(./text(), 'body')"/>
>   </p>
> </xsl:template>
>
> How do I separately select #text before, between and after an arbitrary
> number of interruptions (could be tables, images etc) and process those
> interruptions in document order?

Use:

<xsl:template match="p/text()">
  <xsl:analyze-string......

instead of your <p> matching template.

If you are stuck with 1.0, then you'll have to use a recursive named
template to process the string.

cheers
-- 
Andrew Welch
http://andrewjwelch.com
Kernow: http://kernowforsaxon.sf.net/