Re: Wrap changing element sequence into container: wit

What I am having trouble to do is adding a container around a specific
(fixed-order) sequence of those 'p' elements, say, 'p[style="a"]' and 'p[style="b"]', where the first of these may not always occur.

If you can identify a comparison between two adjacent siblings which, if
true, means that they go in different containers, then you can use
group-starting-with. For example, in this case the condition might be that
the element is not immediately preceded by an element with a value for
@style that is alphabetically less than the current element's @style:

group-starting-with="p[not(preceding-sibling::p[1][@style lt
current()/@style])]"

>  <xsl:template match="*[starts-with(name(), 'b')][1]">
>     <container>
>       <xsl:apply-templates
>         select="self::* | following-sibling::*"
>         mode="within_container"/>
>     </container>
>   </xsl:template>
>
>   <xsl:template match="*[starts-with(name(), 'b')]"
>     mode="within_container">
>       <xsl:copy>
>           <xsl:apply-templates select="node() | @*"
>             mode="#current"/>
>       </xsl:copy>
>   </xsl:template>
>
>   <xsl:template match="*[not(starts-with(name(), 'b'))]">
>       <xsl:copy>
>           <xsl:apply-templates select="node() | @*" />
>       </xsl:copy>
>   </xsl:template>