Subject: Re: [xsl] Finding Only Initial Following Siblings That Meet Some Criteria|
From: "Imsieke, Gerrit, le-tex gerrit.imsieke@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 6 Feb 2020 00:09:06 -0000
In my case, I must start with the first instance of the matching phrase anywhere in the source document (I'm pulling stuff that could be anywhere to a specific location) and then only want to consider things that immediately follow that specific <ph> element.
So unless I'm missing a subtlety of your solution, I don't think it would do quite what I want because it's too inclusive.
o;?On 2/5/20, 5:07 PM, "Imsieke, Gerrit, le-tex gerrit.imsieke@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
Grouping should liberate you from looking ahead or behind. So instead of
matching the first <ph outputclass="x">, you'd match <p> (or more
generally '*[ph[@outputclass]]') and do the group-adjacent grouping for
the child nodes, like this:
<xsl:apply-templates select="@*" mode="#current"/>
This is not shorter in terms of lines of code than what you suggested.
In terms of performance, it could be a bit more efficient than your
solution, depending on the cost of identifying the first
ph[@output-class] and its following siblings, compared to the cost of
identifying a parent of ph[@output-class] and selecting its children.
But as I wanted to say above, in terms of idiomatic XSLT 2+ purity, I'd
always prefer a solution that doesn't look along the preceding/following
axes, even when it is done just once for selecting the for-each-group
On 05.02.2020 23:29, Eliot Kimber ekimber@xxxxxxxxxxxx wrote:
> In my XML I can have adjacent elements that should be processed as a unit, where the adjacent elements all have the same value for a given attribute. Other elements with the same attribute could be following siblings but separated by other elements or text nodes, i.e.:
> <p>Text <ph outputclass="x">1</ph><ph outputclass="x">2</ph> more text <ph outputclass="x">New sequence</ph></p>
> Where the rendered result should combine the first two <ph> elements but not the third, i.e.:
> <p>Text <x>12</x> more text <x>New sequence</x></p>
> Processing is applied to the first element in the document with the @outputclass value "x" and then I want to grab any immediately following siblings with the same @outputclass value and no intervening text or element nodes.
> My solution is to use for-each-group like so:
> <xsl:variable name="this" as="element()" select="."/>
> <xsl:variable name="adjacent-sibs" as="element()+">
> <xsl:for-each-group select="($this, $this/following-sibling::node())"
> <xsl:if test=". is $this">
> <xsl:sequence select="current-group()"/>
> Which works, but I'm thinking there must be a more compact way to do the same selection, but the formulation is escaping me.
> Is there a more compact or more efficient way to make this selection of only immediately-adjacent following siblings?
> Eliot Kimber