Re: [xsl] xml to svg graphs

["Michael Kay michaelkay90@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

No, fn is the standard core function namespace.

All of this can now be done using standard functions, no Saxon or other
extensions needed.

Michael Kay

> On 28 Jan 2026, at 14:38, Dave Pawson dave.pawson@xxxxxxxxx
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> Is fn one of yours Mike?
> I was surprised that you hadn't included it in 2.0
> https://www.saxonica.com/documentation12/index.html#!functions/math
>
> I'll trawl through them and try.
>
> regards
>
> regards
>
>
> On Wed, 28 Jan 2026 at 14:35, Michael Kay michaelkay90@xxxxxxxxx
<mailto:michaelkay90@xxxxxxxxx> <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx
<mailto:xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>> wrote:
>> Why not use fn:abs() which has been there since XPath 2.0?
>>
>> Michael Kay
>>
>>> On 28 Jan 2026, at 14:25, David Carlisle d.p.carlisle@xxxxxxxxx
<mailto:d.p.carlisle@xxxxxxxxx> <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx
<mailto:xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>> wrote:
>>>
>>> This works on the one example I tried
>>>
>>> saxon10 examples/gr1.xml use_msgr2svg.xsl
>>>
>>>
>>> It just uses the built in math namespace, renames power ot pow (so it
works0 and adds a definition of abs (to the`m` namespace, as it was there)
>>>
>>>
>>>
>>> 8,9c8
>>> < xmlns:math="http://exslt.org/math";
>>> < extension-element-prefixes="math"
>>> ---
>>> > xmlns:math="http://www.w3.org/2005/xpath-functions/math";
>>> 769c768
>>> < m:Log10(if ((.) != 0) then math:abs(.) else 1) else (.)"/>
>>> ---
>>> > m:Log10(if ((.) != 0) then m:abs(.) else 1) else (.)"/>
>>> 874c873
>>> < <xsl:value-of select="concat('a', math:abs($dx), ',', $hg, ' 0 0,', $sp,
' ', 2*$dx, ',0')"/>
>>> ---
>>> > <xsl:value-of select="concat('a', m:abs($dx), ',', $hg, ' 0 0,', $sp, '
', 2*$dx, ',0')"/>
>>> 1037c1036
>>> < <xsl:variable name="cif" select="$ps div math:power(10, $rad)"/>
>>> ---
>>> > <xsl:variable name="cif" select="$ps div math:pow(10, $rad)"/>
>>> 1043c1042
>>> < <xsl:value-of select="$st * math:power(10, $rad)"/>
>>> ---
>>> > <xsl:value-of select="$st * math:pow(10, $rad)"/>
>>> 1054c1053
>>> < <xsl:value-of select="$pom * math:power(10, $rad)"/-->
>>> ---
>>> > <xsl:value-of select="$pom * math:pow(10, $rad)"/-->
>>> 1063c1062
>>> < <xsl:variable name="pom" select="round($val * math:power(10, - $rad +1))
* math:power(10, $rad - 1)"/>
>>> ---
>>> > <xsl:variable name="pom" select="round($val * math:pow(10, - $rad +1)) *
math:pow(10, $rad - 1)"/>
>>> 1078a1078,1082
>>> >
>>> > <xsl:function name="m:abs">
>>> >  <xsl:param name="val"/>
>>> >  <xsl:sequence select="if($val &lt; 0) then -$val else $val"/>
>>> > </xsl:function>
>>>
>>>
>>> On Wed, 28 Jan 2026 at 14:16, Martynas JuseviD
ius martynas@xxxxxxxxxxxxx
<mailto:martynas@xxxxxxxxxxxxx> <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx
<mailto:xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>> wrote:
>>>> OK, then I misunderstood what you meant with "graphs" :) My bad, ignore
my links...
>>>>
>>>> On Wed, Jan 28, 2026 at 3:13b/PM Dave Pawson dave.pawson@xxxxxxxxx
<mailto:dave.pawson@xxxxxxxxx> <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx
<mailto:xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>> wrote:
>>>>> Sorry, my data is far from a directed graph.
>>>>>   This is one I did get to work, a simple block graph.
>>>>>
>>>>> regards
>>>>>
>>>>> On Wed, 28 Jan 2026 at 14:09, Martynas JuseviD
ius
martynas@xxxxxxxxxxxxx <mailto:martynas@xxxxxxxxxxxxx>
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx
<mailto:xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>> wrote:
>>>>>> Well, the advantage of RDF is that it's a standard :)
>>>>>> https://www.w3.org/TR/rdf11-primer/
>>>>>>
>>>>>> The downside is that its XML-based format (RDF/XML) is rather
convoluted.
>>>>>>
>>>>>> But you don't need to write RDF/XML by hand - you can use Jena's CLI to
transform from a more human-readable Turtle format to RDF/XML.
>>>>>>
>>>>>> Or heck, I think you could give your names/values data to an LLM and
ask it to produce an RDF equivalent :)
>>>>>>
>>>>>> On Wed, Jan 28, 2026 at 3:05b/PM Dave Pawson dave.pawson@xxxxxxxxx
<mailto:dave.pawson@xxxxxxxxx> <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx
<mailto:xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>> wrote:
>>>>>>> Hi Martynas.
>>>>>>>   The simplicity (and coverage) of Jakobs was ( for me) its
advantage?
>>>>>>>   Two simple lists
>>>>>>> <names/>
>>>>>>> <values/>
>>>>>>>   with a whole host of variants.
>>>>>>>   Not the same 'graphs' as RDF?
>>>>>>>
>>>>>>> regards
>>>>>>>
>>>>>>> On Wed, 28 Jan 2026 at 13:56, Martynas JuseviD
ius
martynas@xxxxxxxxxxxxx <mailto:martynas@xxxxxxxxxxxxx>
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx
<mailto:xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>> wrote:
>>>>>>>> Hey Dave,
>>>>>>>>
>>>>>>>> Not a direct replacement, but FWIW I have a stylesheet that
transforms RDF graphs (via the RDF/XML format) to force-directed SVG layouts:
>>>>>>>>
https://github.com/AtomGraph/Web-Client/blob/master/src/main/webapp/static/co
m/atomgraph/client/xsl/converters/RDFXML2SVG.xsl
>>>>>>>>
>>>>>>>> The RDF/XML structure might be specific to "normalised" Jena's
RDF/XML output (can't exactly recall now).
>>>>>>>> https://jena.apache.org/documentation/tools/#riot-and-related
>>>>>>>>
>>>>>>>> Martynas
>>>>>>>> atomgraph.com <http://atomgraph.com/>
>>>>>>>> On Wed, Jan 28, 2026 at 2:48b/PM Dave Pawson dave.pawson@xxxxxxxxx
<mailto:dave.pawson@xxxxxxxxx> <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx
<mailto:xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>> wrote:
>>>>>>>>> A long time ago...
>>>>>>>>>   Jakob wrote some code, now resident (rotting?)
>>>>>>>>> on Google code.
>>>>>>>>> https://code.google.com/archive/p/graph2svg/downloads
>>>>>>>>>
>>>>>>>>> At the time he use fxsl and exsl for the math(s).
>>>>>>>>>
>>>>>>>>> IMHO this is well worth bringing up to date.
>>>>>>>>> I asked Jakob and received no reply.
>>>>>>>>>
>>>>>>>>> Saxon math 'extension' only lacks abs,  from
>>>>>>>>> my early trials?
>>>>>>>>>
>>>>>>>>> If anyone with a mathematical bent has time
>>>>>>>>> to do the xslt world a favour, I would certainly
>>>>>>>>> appreciate it.
>>>>>>>>>
>>>>>>>>> regards
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> Dave Pawson
>>>>>>>>> XSLT XSL-FO FAQ.
>>>>>>>>> Docbook FAQ.
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>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> Dave Pawson
>>>>>>> XSLT XSL-FO FAQ.
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>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Dave Pawson
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>
> --
> Dave Pawson
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