Re: [xsl] Grouping to Separate Out Block Level Elements from Mixed Content

["Imsieke, Gerrit, le-tex gerrit.imsieke@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

Hi Don,

I haven't looked at your grouping approach in detail. The spec [1] 
contains a similar example that employs group-adjacent instead of 
group-starting-with/group-ending-with. Maybe you can adapt this approach 
to your situation?

Gerrit

[1] https://www.w3.org/TR/xslt-30/#d7e42443

On 05.02.2022 16:20, Don Smith dsmith_lockesmith@xxxxxxxxx wrote:
> The sample XML file has two paragraphs ("p" element) that contain mixed 
> content. However, some of the child elements of "p" are block level 
> elements. I need to separate these block level elements out from the 
> mixed content and place each component of the paragraph content in their 
> own consecutive blocks, as appropriate. So, in the first example input 
> paragraph (see attached for complete input file):
> <p>In Boolean algebra, the algebraic normal form <i>(ANF)</i> is a way 
> of writing logical formulas in
>  B  B  one of three subforms: <list list-type="simple">
>  B  B  B <list-item>
>  B  B  B  <p>The entire formula is purely true or false</p>
>  B  B  B </list-item>
>  B  B  B <list-item>
>  B  B  B  <p>One or more variables are ANDed together into a term</p>
>  B  B  B </list-item>
>  B  B  B <list-item>
>  B  B  B  <p>The previous subform with a purely true term</p>
>  B  B  B </list-item>
>  B  B  </list>Formulas written in ANF are also known as Zhegalkin 
> polynomials and Positive Polarity (or
>  B  B  Parity) ReedbMuller expressions (PPRM).</p>
>
> Should on output be:
>
> <p>In Boolean algebra, the algebraic normal form <i>(ANF)</i> is a way 
> of writing logical formulas in
>  B  B  one of three subforms:<p>
>  B <list list-type="simple">
>  B  B  B <list-item>
>  B  B  B  <p>The entire formula is purely true or false</p>
>  B  B  B </list-item>
>  B  B  B <list-item>
>  B  B  B  <p>One or more variables are ANDed together into a term</p>
>  B  B  B </list-item>
>  B  B  B <list-item>
>  B  B  B  <p>The previous subform with a purely true term</p>
>  B  B  B </list-item>
>  B  B  </list>
> <p>Formulas written in ANF are also known as Zhegalkin polynomials and 
> Positive Polarity (or
>  B  B  Parity) ReedbMuller expressions (PPRM).</p>
>
> You'll note in the second example input paragraph a more complex 
> scenario where there are two nested block elements. I think a recursive 
> solution is needed for that but so far I've had no success in achieving it.
>
> The XSLT I've written so far (attached) accomplishes the first needed 
> part by separating the block elements from the mixed content that comes 
> *before* the block using for-each-group and group-starting-with. But 
> attempts to achieve the same result on mixed content that *follows* the 
> block using for-each-group and group-ending-with have not succeeded. I 
> think it's close but am just missing a crucial detail. And, as noted 
> already, the solution does need to account for the possibility of nested 
> blocks.
>
> Embedded XSLT:
>
> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
>  B  B  xmlns:xs="http://www.w3.org/2001/XMLSchema";
>  B  B  xmlns:xlink="http://www.w3.org/1999/xlink";
>  B  B  xmlns:mml="http://www.w3.org/1998/Math/MathML";
>  B  B  exclude-result-prefixes="xs"
>  B  B  version="2.0">
>  B  B  <xsl:template match="p">
>  B  B  B  B  <xsl:for-each-group select="node()" group-starting-with="list | 
> disp-formula | mml:math">
>  B  B  B  B  B  B  <xsl:variable name="group1" as="element()">
>  B  B  B  B  B  B  B  B  <GROUP1>
>  B  B  B  B  B  B  B  B  B  B  <xsl:apply-templates 
> select="current-group()"></xsl:apply-templates>
>  B  B  B  B  B  B  B  B  </GROUP1>
>  B  B  B  B  B  B  </xsl:variable>
>  B  B  B  B  B  B  <xsl:choose>
>  B  B  B  B  B  B  B  B  <xsl:when test="$group1/list |
>  B  B  B  B  B  B  B  B  B  B  $group1/disp-formula |
>  B  B  B  B  B  B  B  B  B  B  $group1/mml:math">
>  B  B  B  B  B  B  B  B  B  B  <xsl:call-template name="end_group">
>  B  B  B  B  B  B  B  B  B  B  B  B  <xsl:with-param name="input" select="$group1"/>
>  B  B  B  B  B  B  B  B  B  B  </xsl:call-template>
>  B  B  B  B  B  B  B  B  </xsl:when>
>  B  B  B  B  B  B  B  B  <xsl:otherwise>
>  B  B  B  B  B  B  B  B  B  B  <xsl:copy-of select="$group1"/>
>  B  B  B  B  B  B  B  B  </xsl:otherwise>
>  B  B  B  B  B  B  </xsl:choose>
>  B  B  B  B  </xsl:for-each-group>
>  B  B  </xsl:template>
>  B  B  <xsl:template name="end_group">
>  B  B  B  B  <xsl:param name="input" >default</xsl:param>
>  B  B  B  B  <xsl:variable name="group2" as="element()" >
>  B  B  B  B  B  B  <xsl:for-each-group select="$input" group-ending-with="list 
> | disp-formula | mml:math">
>  B  B  B  B  B  B  B  B  <PGROUP2>
>  B  B  B  B  B  B  B  B  B  B  <xsl:apply-templates 
> select="current-group()"></xsl:apply-templates>
>  B  B  B  B  B  B  B  B  </PGROUP2>
>  B  B  B  B  B  B  </xsl:for-each-group>
>  B  B  B  B  </xsl:variable>
>  B  B  B  B  <xsl:copy-of select="$group2"/>
>  B  B  </xsl:template>
>
>  B  B  <xsl:template match="/">
>  B  B  B  B  <output>
>  B  B  B  B  B  B  <xsl:apply-templates/>
>  B  B  B  B  </output>
>  B  B  </xsl:template>
>  B  B  <xsl:template match="*">
>  B  B  B  B  <xsl:variable name="name" as="xs:string" select="name()"/>
>  B  B  B  B  <xsl:element name="{$name}">
>  B  B  B  B  B  B  <xsl:apply-templates/>
>  B  B  B  B  </xsl:element>
>  B  B  </xsl:template>
> </xsl:stylesheet>
>
> Thanks in advance,
>
> Don