From f61d3988767c105a881ea544eb363d2b3939a1ca Mon Sep 17 00:00:00 2001
From: Colin <colin@uninsane.org>
Date: Sun, 7 Dec 2025 01:25:01 +0000
Subject: [PATCH 1/2] Update .inx schema to ISO Schematron

Schematron has two "flavors"; the pre-2006 Schematron 1.6
(xmlns="http://www.ascc.net/xml/schematron") and the modern ISO
Schematron (xmlns=http://purl.oclc.org/dsdl/schematron).
---
 inkex/tester/inkscape.extension.schema | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/inkex/tester/inkscape.extension.schema b/inkex/tester/inkscape.extension.schema
index 63cb97bc..0fd9834e 100644
--- a/inkex/tester/inkscape.extension.schema
+++ b/inkex/tester/inkscape.extension.schema
@@ -1,9 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<sch:schema xmlns:sch="http://www.ascc.net/xml/schematron">
-<sch:ns uri="http://www.inkscape.org/namespace/inkscape/extension" prefix="inx"/>
-  <sch:pattern name="duplicateOptionValues">
-    <sch:rule context="//inx:param/inx:option">
-      <sch:report test="preceding-sibling::inx:option/@value = @value">Warning: @value values should be unique for a given option.</sch:report>
-    </sch:rule>
-  </sch:pattern>
-</sch:schema>
+<schema xmlns="http://purl.oclc.org/dsdl/schematron">
+<ns uri="http://www.inkscape.org/namespace/inkscape/extension" prefix="inx"/>
+  <pattern>
+    <title>duplicateOptionValues</title>
+    <rule context="//inx:param/inx:option">
+      <report test="preceding-sibling::inx:option/@value = @value">Warning: @value values should be unique for a given option.</report>
+    </rule>
+  </pattern>
+</schema>
-- 
GitLab


From 04b3cc3d2eb592407edbad3b5b43664f700cbac0 Mon Sep 17 00:00:00 2001
From: Colin <colin@uninsane.org>
Date: Sun, 7 Dec 2025 01:26:00 +0000
Subject: [PATCH 2/2] migrate inx schemas validation from `lxml.etree` to
 `lxml.isoschematron`

without this, schema validation is not supported by newer lxml builds.

lxml ships two classes to ingest & validate Schematron files:
- `lxml.etree.Schematron`
- `lxml.isoschematron.Schematron`

the former is a wrapper around libxml2's schematron component,
which is disabled by default as of 2.15 and planned for removal
in 2.16
<https://gitlab.gnome.org/GNOME/libxml2/-/releases#major-changes>

the latter is maintained as part of lxml itself. by using it we can
support schema validation regardless of the user's libxml2 version.
---
 inkex/tester/inx.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/inkex/tester/inx.py b/inkex/tester/inx.py
index 0c2e5d59..e14642a1 100644
--- a/inkex/tester/inx.py
+++ b/inkex/tester/inx.py
@@ -8,7 +8,7 @@ import os
 import sys
 from importlib import resources
 
-from lxml import etree
+from lxml import etree, isoschematron
 
 from ..utils import PY3
 from ..inx import InxFile
@@ -151,7 +151,7 @@ class InxMixin:
 def _load_inx_schemas():
     _SCHEMA_CLASSES = {
         ".rng": etree.RelaxNG,
-        ".schema": etree.Schematron,  # "pre-ISO-Schematron"
+        ".schema": isoschematron.Schematron,
     }
 
     if sys.version_info > (3, 9):
-- 
GitLab