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Subject: Re: [docbook-apps] column spanning issue


As you discovered, the current DocBook XSL stylesheets are written to the 
XSLT 1.0 spec.  Although there is a backwards-compatibility mode for XSLT 
2.0 processors, I think it is risky to use a 2.0 processor such as Saxon 8.

Theoretically the use of <xsl:stylesheet version="1.0"> should tell the 2.0 
processor to treat the variables as numbers when numbers are called for in 
an expression.  I think that is what Saxon 8 should do in this case, but 
apparently it needs the data type to be explicit.

Bob Stayton
Sagehill Enterprises
DocBook Consulting
bobs@sagehill.net


----- Original Message ----- 
From: "Jay Bryant" <jay@bryantcs.com>
To: "Bob Stayton" <bobs@sagehill.net>; <docbook-apps@lists.oasis-open.org>
Sent: Wednesday, August 23, 2006 1:18 PM
Subject: Re: [docbook-apps] column spanning issue


> Well, it took some tracking, but I figured out that the issue arises 
> because
> I'm using Saxon 8 for the XSLT processor.
>
> The culprit is the calculate.colspan template, scol and ecol, which
> contains:
>
>      <xsl:choose>
>        <xsl:when test="$ecol &gt;= $scol">
>          <xsl:value-of select="$ecol - $scol + 1"/>
>        </xsl:when>
>        <xsl:otherwise>
>          <xsl:value-of select="$scol - $ecol + 1"/>
>        </xsl:otherwise>
>      </xsl:choose>
>
> It worked when I made the following change:
>
>      <xsl:choose>
>        <xsl:when test="number($ecol) &gt;= number($scol)">
>          <xsl:value-of select="$ecol - $scol + 1"/>
>        </xsl:when>
>        <xsl:otherwise>
>          <xsl:value-of select="$scol - $ecol + 1"/>
>        </xsl:otherwise>
>      </xsl:choose>
>
> Apparently, XSLT 2.0 (or perhaps just Saxon 8) has different rules for
> converting strings to numbers. I'll post a message in the Saxon help list
> and see what Mike Kay has to say. (Personally, I think the &gt;= operator
> should imply conversion from strings to numbers, but perhaps there's some
> bit of the spec that says otherwise.)
>
> FWIW
>
> Jay Bryant
> Bryant Communication Services
>
>
> ----- Original Message ----- 
> From: "Bob Stayton" <bobs@sagehill.net>
> To: "Jay Bryant" <jay@bryantcs.com>; <docbook-apps@lists.oasis-open.org>
> Sent: Wednesday, August 23, 2006 2:10 PM
> Subject: Re: [docbook-apps] column spanning issue
>
>
>> Hi Jay,
>> I'm unable to duplicate your problem.  I cut and pasted your table into 
>> a
>> document and processed with the fo/docbook.xsl stylesheet from 1.70.1 
>> (and
>> 1.69.1 and 1.68.1) and I got this output:
>>
>>             <fo:table-body start-indent="0pt">
>>               <fo:table-row>
>>                 <fo:table-cell padding-left="2pt" padding-right="2pt"
>> padding-top="2pt" padding-bottom="2pt" border-right-width="0.5pt"
>> border-right-style="solid" border-right-color="black" 
>> text-align="center"
>> number-columns-spanned="4">
>>                   <fo:block>VER</fo:block>
>>                 </fo:table-cell>
>>                 <fo:table-cell padding-left="2pt" padding-right="2pt"
>> padding-top="2pt" padding-bottom="2pt" border-right-width="0.5pt"
>> border-right-style="solid" border-right-color="black" 
>> text-align="center"
>> number-columns-spanned="4">
>>                   <fo:block>FAM</fo:block>
>>                 </fo:table-cell>
>>                 <fo:table-cell padding-left="2pt" padding-right="2pt"
>> padding-top="2pt" padding-bottom="2pt" text-align="center"
>> number-columns-spanned="8">
>>                   <fo:block>PARTNO</fo:block>
>>                 </fo:table-cell>
>>               </fo:table-row>
>>             </fo:table-body>
>>
>>
>> Bob Stayton
>> Sagehill Enterprises
>> DocBook Consulting
>> bobs@sagehill.net
>>
>>
>> ----- Original Message ----- 
>> From: "Jay Bryant" <jay@bryantcs.com>
>> To: <docbook-apps@lists.oasis-open.org>
>> Sent: Wednesday, August 23, 2006 11:31 AM
>> Subject: [docbook-apps] column spanning issue
>>
>>
>> > Note that I have removed all attributes except number-columns-spanned,
>> > for
>> > brevity's sake. I have also removed rows around the one causing the
>> > problem.
>> >
>> > Given the following docbook fragment:
>> >
>> > <informaltable frame="none">
>> >  <tgroup cols="16" align="left" colsep="1" rowsep="0">
>> >    <colspec colname="c1" colwidth=".4in"/>
>> >    <colspec colname="c2" colwidth=".4in"/>
>> >    <colspec colname="c3" colwidth=".4in"/>
>> >    <colspec colname="c4" colwidth=".4in"/>
>> >    <colspec colname="c5" colwidth=".4in"/>
>> >    <colspec colname="c6" colwidth=".4in"/>
>> >    <colspec colname="c7" colwidth=".4in"/>
>> >    <colspec colname="c8" colwidth=".4in"/>
>> >    <colspec colname="c9" colwidth=".4in"/>
>> >    <colspec colname="c10" colwidth=".4in"/>
>> >    <colspec colname="c11" colwidth=".4in"/>
>> >    <colspec colname="c12" colwidth=".4in"/>
>> >    <colspec colname="c13" colwidth=".4in"/>
>> >    <colspec colname="c14" colwidth=".4in"/>
>> >    <colspec colname="c15" colwidth=".4in"/>
>> >    <colspec colname="c16" colwidth=".4in"/>
>> >    <tbody>
>> >      <row>
>> >        <entry align="center" namest="c1" nameend="c4">VER</entry>
>> >        <entry align="center" namest="c5" nameend="c8">FAM</entry>
>> >        <entry align="center" namest="c9" nameend="c16">PARTNO</entry>
>> >      </row>
>> >    </tbody>
>> >  </tgroup>
>> > </informaltable>
>> >
>> > I expect the following output from the docbook.fo stylesheet:
>> >
>> > <!-- table markup trimmed for brevity's sake -->
>> > <fo:table-cell number-columns-spanned="4">
>> >  <fo:block>VER</fo:block>
>> > </fo:table-cell>
>> > <fo:table-cell number-columns-spanned="4">
>> >  <fo:block>FAM</fo:block>
>> > </fo:table-cell>
>> > <fo:table-cell number-columns-spanned="8">
>> >  <fo:block>PARTNO</fo:block>
>> > </fo:table-cell>
>> >
>> > <!-- table markup trimmed for brevity's sake -->
>> >
>> > Instead, I get this:
>> >
>> > <!-- table markup trimmed for brevity's sake -->
>> > <fo:table-cell number-columns-spanned="4">
>> >  <fo:block>VER</fo:block>
>> > </fo:table-cell>
>> > <fo:table-cell number-columns-spanned="4">
>> >  <fo:block>FAM</fo:block>
>> > </fo:table-cell>
>> > <fo:table-cell>
>> >  <fo:block>PARTNO</fo:block>
>> > </fo:table-cell>
>> > <fo:table-cell>
>> >  <fo:block/>
>> > </fo:table-cell>
>> > <fo:table-cell>
>> >  <fo:block/>
>> > </fo:table-cell>
>> > <fo:table-cell>
>> >  <fo:block/>
>> > </fo:table-cell>
>> > <fo:table-cell>
>> >  <fo:block/>
>> > </fo:table-cell>
>> > <fo:table-cell>
>> >  <fo:block/>
>> > </fo:table-cell>
>> > <fo:table-cell>
>> >  <fo:block/>
>> > </fo:table-cell>
>> > <fo:table-cell>
>> >  <fo:block/>
>> > </fo:table-cell>
>> > <fo:table-cell>
>> >  <fo:block/>
>> > </fo:table-cell>
>> > <!-- table markup trimmed for brevity's sake -->
>> >
>> > Note that, in addition to not spanning, the number of cells is wrong 
>> > (9
>> > rather than 8).
>> >
>> > What caused this and what can I do about it?
>> >
>> > Thanks.
>> >
>> > Jay Bryant
>> > Bryant Communication Services
>> >
>> >
>> >
>> > ---------------------------------------------------------------------
>> > To unsubscribe, e-mail: docbook-apps-unsubscribe@lists.oasis-open.org
>> > For additional commands, e-mail: 
>> > docbook-apps-help@lists.oasis-open.org
>> >
>> >
>> >
>>
>>
>>
>> ---------------------------------------------------------------------
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>>
>
>
>
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