Re: [xsl] xml to svg graphs

["Dave Pawson dave.pawson@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

Noted. Thanks Mike.

regards

On Wed, 28 Jan 2026 at 14:42, Michael Kay michaelkay90@xxxxxxxxx <
xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:

> 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 <
> 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 <
>> 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
>> <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 <
>>> 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 <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 <
>>>>> 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 <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
>>>>>>>
>>>>>>> On Wed, Jan 28, 2026 at 2:48b/PM Dave Pawson dave.pawson@xxxxxxxxx <
>>>>>>> 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
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>>>>>>
>>>>>>
>>>>>> --
>>>>>> Dave Pawson
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> Dave Pawson
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--
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