Re: [xsl] Bibliography author repetition handling

["Eliot Kimber ekimber@xxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

No argument with Wendellbs general solution, just one small coding style
twiddle:

Instead of this:

       <xsl:apply-templates select="current-group() except .">
          <xsl:with-param tunnel="yes" name="repeat" select="true()"/>
       </xsl:apply-templates>

I would probably use a distinct mode for the repeated items:

       <xsl:apply-templates select="current-group() except ."
mode=brepeated-bib-itemsb/>

Ibve come to accept that preferring templates and modes over passing state
is the best XSLT style.

All the items that have no difference in behavior in the two modes can simply
match in both modes:

<xsl:template match=bbiblb mode=b#default repeated-bib-itemsb>
  <xsl:apply-templates mode=b#current-modeb/>
</xsl:template>

Otherwise therebs going to have to be a choose instruction to check the
brepeatb parameter:

<xsl:template b&>
  <xsl:param name=brepeatb tunnel=byesb select=bfalse()b/>
 <xsl:choose>
   <xsl:when test=b$repeatb>
     b&
  </xsl:when>
  <xsl:otherwise>
    b&
  </xsl:otherwise>
</choose>
</xsl:template>

Better to put the choice in the mode and/or match expression.

Cheers,

E.
--
Eliot Kimber
http://contrext.com



On 10/9/17, 9:58 AM, "Wendell Piez wapiez@xxxxxxxxxxxxxxx"
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:

    Hi,

    I think Chuck wants group-adjacent.

    Chuck, what Martin is hinting is that rather than testing each bibl
    (each as you match it) to see whether it is a "repeat" or not, you
    first group all the bibls by their (analytic) author, then every
    member of the group after the first is a repeat.

    (Define "repeat" as "bibl that should get '----' instead of a lead
    author's name by virtue of its having the same lead author as its
    immediate predecessor".)

    This means that most of your groups will have only one member, but
    once in a while (when authors are repeated in runs) you will have a
    group of two or even more members, only the first of which is not a
    repeat.

    Due to a design quirk in XSLT (semantics of "." inside groups), you
    can code this fairly elegantly:

    <xsl:for-each-group select="bibl" group-adjacent="gimme-author()">
       <!-- apply templates to the first member -->
       <xsl:apply-templates select=".">
       <!-- apply templates to the rest w/ a param -->
       <xsl:apply-templates select="current-group() except .">
          <xsl:with-param tunnel="yes" name="repeat" select="true()"/>
       </xsl:apply-templates>
    </xsl:for-each-group>

    Notes:

    * No element is created for the group since the grouping is only to
    sort them into categories.

    * gimme-author() will be whatever XPath (path or other expression)
    indicates the value to be grouped on (i.e. the leading author name
    however normalized).

    * inside the group, "." refers only to the first member of the group,
    so "current-group() except ." returns all the others.

    * Leaving it to you to figure out what to do at the receiving end with
    the Boolean parameter $repeat ... although I've indicated
    "tunnel='yes'" to leave another clue as to how it might be done. Or
    instead of a parameter you could also use a mode here to distinguish
    between handling the normal cases and the repeat cases. (Presumably
    they are the same except for how they treat that author.)

    * group-by will have a similar effect to group-adjacent but only if
    the nodes are already in their final sorted order; if there is some
    anomaly in the listing, group-adjacent is more robust (and will
    reflect that anomaly not reorder around it).

    It's been a few days, so you may already have tackled this. Still it's
    a fun little problem.

    Cheers, Wendell



    On Wed, Oct 4, 2017 at 4:18 AM, Martin Honnen martin.honnen@xxxxxx
    <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
    > Am 04.10.2017 um 08:25 schrieb Charles Muller acmuller@xxxxxxxxxxxxxxx:
    >>
    >> In a TEI <biblStruct> bibliography that uses
biblStruct/*/author/surname
    >> (etc), I have managed to write the code that checks if the author name
in
    >> the prior <biblStruct> is the same, in which case the output is ---.
rather
    >> than the author's name. It works fine, but I'm running into a problem
where
    >> there the first author name is the same as that of the prior
<biblStruct>
    >> entry, but there are also multiple authors, in which case the full
name
    >> should be printed out.
    >>
    >> I thought that one way I might resolve this is to test if the number
of
    >> authors in the prior entry is the same as this one, but I can't get it
to
    >> work. I also don't know if this is even the best way of handling this.
The
    >> XML is like this:  (present output here:
    >> http://www.acmuller.net/articles-shisou.html)
    >
    >
    > To me this sounds like a grouping problem where you want to group your
    > biblStruct elements with a composite key mad up of analytic/author, I am
not
    > sure whether you want group-adjacent or group-by.
    >
    >



    --
    Wendell Piez | http://www.wendellpiez.com
    XML | XSLT | electronic publishing
    Eat Your Vegetables
    _____oo_________o_o___ooooo____ooooooo_^