Re: [xsl] xml to svg graphs

["David Carlisle d.p.carlisle@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

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
>>>>>> XSLT XSL-FO FAQ.
>>>>>> Docbook FAQ.
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>>>>
>>>>
>>>> --
>>>> Dave Pawson
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>>
>>
>> --
>> Dave Pawson
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