Add experimental RELAX NG schema for skin XML files.

2 files changed, 900 insertions, 0 deletions

diff --git a/Docs/text2skin-1.1.rng b/Docs/text2skin-1.1.rng
new file mode 100644
index 0000000..41ee971
--- /dev/null
+++ b/Docs/text2skin-1.1.rng
@@ -0,0 +1,899 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Experimantal RELAX NG schema for text2skin (skin) version 1.1 skins.
+
+Usage:
+* With jing, <http://code.google.com/p/jing-trang/>:
+  java -jar jing.jar text2skin-1.1.rng foo.skin
+* With msv, <http://msv.dev.java.net/>:
+  java -jar msv.jar text2skin-1.1.rng foo.skin
+* With xmllint, <http://xmlsoft.org/>:
+  xmllint -noout -relaxng text2skin-1.1.rng foo.skin
+* With xmlstarlet, <http://xmlstarlet.sourceforge.net/>:
+  xmlstarlet val -e -r text2skin-1.1.rng foo.skin
+
+jing and msv seem to produce more to-the-point, easier to understand error
+messages than xmllint or xmlstarlet as of jing 20091111, msv 20090415 and
+libxml 2.7.7, YMMV.
+
+Known/potential issues:
+* <block> handling may not be flexible enough, see for example izegrey16.skin
+  (izegrey16 1.0-20050304, <http://skins.vdr-developer.org/text2skin/>)
+    <display id="volume">
+      <block condition="not({VolumeIsMute})">
+        <window ...>
+        ...
+        </window>
+      </block>
+    </display>
+  ...and we may have the same issues with allowing nonsensical element
+  combinations in other cases as well, would probably need some <group>s
+  and <choice>s.
+* See TODO comments below.
+-->
+<grammar ns=""
+         xmlns="http://relaxng.org/ns/structure/1.0"
+         datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
+
+  <start>
+
+    <element name="skin">
+      <attribute name="version">
+        <data type="token">
+          <!-- TODO: or enforce 1.1? -->
+          <param name="pattern">\d+\.\d+</param>
+        </data>
+      </attribute>
+      <attribute name="name">
+        <ref name="nonEmptyNormalizedStringValue"/>
+      </attribute>
+      <attribute name="screenBase">
+        <choice>
+          <value>relative</value>
+          <value>absolute</value>
+          <value>abs1280x720</value>
+          <value>abs1920x1080</value>
+        </choice>
+      </attribute>
+
+      <oneOrMore>
+        <ref name="displayElement"/>
+      </oneOrMore>
+    </element>
+
+  </start>
+
+  <!-- Elements -->
+
+  <define name="blinkElement">
+    <element name="blink">
+      <ref name="textAttributes"/>
+      <optional>
+        <attribute name="blinkColor">
+          <ref name="colorValue"/>
+        </attribute>
+      </optional>
+      <ref name="delayAttribute"/>
+      <ref name="nonEmptyStringValue"/>
+    </element>
+  </define>
+
+  <define name="blockElement">
+    <element name="block">
+      <ref name="commonAttributes"/>
+      <ref name="widthHeightAttributes"/>
+      <interleave>
+          <zeroOrMore>
+            <ref name="blinkElement"/>
+          </zeroOrMore>
+          <!-- TODO: is block allowed here (nested blocks)? -->
+          <zeroOrMore>
+            <ref name="blockElement"/>
+          </zeroOrMore>
+          <zeroOrMore>
+            <ref name="ellipseElement"/>
+          </zeroOrMore>
+          <zeroOrMore>
+            <ref name="imageElement"/>
+          </zeroOrMore>
+          <!-- TODO: is item allowed here? -->
+          <!-- TODO: is list allowed here? -->
+          <zeroOrMore>
+            <ref name="listElement"/>
+          </zeroOrMore>
+          <zeroOrMore>
+            <ref name="marqueeElement"/>
+          </zeroOrMore>
+          <zeroOrMore>
+            <ref name="progressElement"/>
+          </zeroOrMore>
+          <zeroOrMore>
+            <ref name="rectangleElement"/>
+          </zeroOrMore>
+          <zeroOrMore>
+            <ref name="scrollbarElement"/>
+          </zeroOrMore>
+          <zeroOrMore>
+            <ref name="scrolltextElement"/>
+          </zeroOrMore>
+          <zeroOrMore>
+            <ref name="slopeElement"/>
+          </zeroOrMore>
+          <zeroOrMore>
+            <ref name="textElement"/>
+          </zeroOrMore>
+      </interleave>
+    </element>
+  </define>
+
+  <define name="displayElement">
+    <element name="display">
+      <attribute name="id">
+        <choice>
+          <value>channelInfo</value>
+          <value>channelSmall</value>
+          <value>volume</value>
+          <value>audioTracks</value>
+          <value>message</value>
+          <value>replayInfo</value>
+          <value>replaySmall</value>
+          <value>menu</value>
+        </choice>
+      </attribute>
+      <ref name="refreshAttribute"/>
+
+      <oneOrMore>
+        <ref name="windowElement"/>
+      </oneOrMore>
+      <interleave>
+        <zeroOrMore>
+          <ref name="blinkElement"/>
+        </zeroOrMore>
+        <zeroOrMore>
+          <ref name="blockElement"/>
+        </zeroOrMore>
+        <zeroOrMore>
+          <ref name="ellipseElement"/>
+        </zeroOrMore>
+        <zeroOrMore>
+          <ref name="imageElement"/>
+        </zeroOrMore>
+        <zeroOrMore>
+          <ref name="listElement"/>
+        </zeroOrMore>
+        <zeroOrMore>
+          <ref name="marqueeElement"/>
+        </zeroOrMore>
+        <zeroOrMore>
+          <ref name="progressElement"/>
+        </zeroOrMore>
+        <zeroOrMore>
+          <ref name="rectangleElement"/>
+        </zeroOrMore>
+        <zeroOrMore>
+          <ref name="scrollbarElement"/>
+        </zeroOrMore>
+        <zeroOrMore>
+          <ref name="scrolltextElement"/>
+        </zeroOrMore>
+        <zeroOrMore>
+          <ref name="slopeElement"/>
+        </zeroOrMore>
+        <zeroOrMore>
+          <ref name="textElement"/>
+        </zeroOrMore>
+      </interleave>
+    </element>
+  </define>
+
+  <define name="ellipseElement">
+    <element name="ellipse">
+      <ref name="positionAttributes"/>
+      <ref name="commonAttributes"/>
+      <attribute name="color">
+        <ref name="colorValue"/>
+      </attribute>
+      <ref name="arcAttribute"/>
+    </element>
+  </define>
+
+  <define name="imageElement">
+    <element name="image">
+      <optional>
+        <attribute name="x">
+          <ref name="xValue"/>
+        </attribute>
+      </optional>
+      <optional>
+        <attribute name="y">
+          <ref name="yValue"/>
+        </attribute>
+      </optional>
+      <ref name="positionAttributes"/>
+      <ref name="commonAttributes"/>
+      <optional>
+        <attribute name="alpha">
+          <data type="unsignedByte"/>
+        </attribute>
+      </optional>
+      <optional>
+        <attribute name="colors">
+          <data type="positiveInteger"/>
+        </attribute>
+      </optional>
+      <optional>
+        <attribute name="color">
+          <ref name="colorValue"/>
+        </attribute>
+      </optional>
+      <optional>
+        <attribute name="bgColor">
+          <ref name="colorValue"/>
+        </attribute>
+      </optional>
+      <optional>
+        <attribute name="maskColor">
+          <ref name="colorValue"/>
+        </attribute>
+      </optional>
+      <attribute name="path">
+        <data type="string">
+          <param name="minLength">1</param>
+        </data>
+      </attribute>
+    </element>
+  </define>
+
+  <define name="itemElement">
+    <element name="item">
+      <ref name="commonAttributes"/>
+      <optional>
+        <attribute name="height">
+          <data type="positiveInteger"/>
+        </attribute>
+      </optional>
+    </element>
+  </define>
+
+  <define name="listElement">
+    <element name="list">
+      <ref name="positionAttributes"/>
+      <ref name="commonAttributes"/>
+      <ref name="widthHeightAttributes"/>
+      <ref name="itemElement"/>
+      <interleave>
+        <zeroOrMore>
+          <ref name="blinkElement"/>
+        </zeroOrMore>
+        <zeroOrMore>
+          <ref name="blockElement"/>
+        </zeroOrMore>
+        <zeroOrMore>
+          <ref name="ellipseElement"/>
+        </zeroOrMore>
+        <zeroOrMore>
+          <ref name="imageElement"/>
+        </zeroOrMore>
+        <!-- TODO: is list allowed here (nested lists)? -->
+        <zeroOrMore>
+          <ref name="marqueeElement"/>
+        </zeroOrMore>
+        <zeroOrMore>
+          <ref name="progressElement"/>
+        </zeroOrMore>
+        <zeroOrMore>
+          <ref name="rectangleElement"/>
+        </zeroOrMore>
+        <zeroOrMore>
+          <ref name="scrollbarElement"/>
+        </zeroOrMore>
+        <zeroOrMore>
+          <ref name="scrolltextElement"/>
+        </zeroOrMore>
+        <zeroOrMore>
+          <ref name="slopeElement"/>
+        </zeroOrMore>
+        <zeroOrMore>
+          <ref name="textElement"/>
+        </zeroOrMore>
+      </interleave>
+    </element>
+  </define>
+
+  <define name="marqueeElement">
+    <element name="marquee">
+      <ref name="textAttributes"/>
+      <ref name="delayAttribute"/>
+      <ref name="nonEmptyStringValue"/>
+    </element>
+  </define>
+
+  <define name="progressElement">
+    <element name="progress">
+      <ref name="positionAttributes"/>
+      <ref name="commonAttributes"/>
+      <optional>
+        <attribute name="color">
+          <ref name="colorValue"/>
+        </attribute>
+      </optional>
+      <optional>
+        <attribute name="bgColor">
+          <ref name="colorValue"/>
+        </attribute>
+      </optional>
+      <optional>
+        <attribute name="mark">
+          <ref name="colorValue"/>
+        </attribute>
+      </optional>
+      <optional>
+        <attribute name="active">
+          <ref name="colorValue"/>
+        </attribute>
+      </optional>
+      <optional>
+        <attribute name="keep">
+          <ref name="colorValue"/>
+        </attribute>
+      </optional>
+      <optional>
+        <attribute name="current">
+          <ref name="nonEmptyNormalizedStringValue"/>
+        </attribute>
+        <attribute name="total">
+          <ref name="nonEmptyNormalizedStringValue"/>
+        </attribute>
+      </optional>
+    </element>
+  </define>
+
+  <define name="rectangleElement">
+    <element name="rectangle">
+      <ref name="positionAttributes"/>
+      <ref name="commonAttributes"/>
+      <attribute name="color">
+        <ref name="colorValue"/>
+      </attribute>
+    </element>
+  </define>
+
+  <define name="scrollbarElement">
+    <element name="scrollbar">
+      <ref name="positionAttributes"/>
+      <ref name="commonAttributes"/>
+      <optional>
+        <attribute name="color">
+          <ref name="colorValue"/>
+        </attribute>
+      </optional>
+      <optional>
+        <attribute name="bgColor">
+          <ref name="colorValue"/>
+        </attribute>
+      </optional>
+    </element>
+  </define>
+
+  <define name="scrolltextElement">
+    <element name="scrolltext">
+      <ref name="textAttributes"/>
+      <ref name="nonEmptyStringValue"/>
+    </element>
+  </define>
+
+  <define name="slopeElement">
+    <element name="slope">
+      <ref name="positionAttributes"/>
+      <ref name="commonAttributes"/>
+      <attribute name="color">
+        <ref name="colorValue"/>
+      </attribute>
+      <ref name="arcAttribute"/>
+    </element>
+  </define>
+
+  <define name="textElement">
+    <element name="text">
+      <ref name="textAttributes"/>
+      <ref name="nonEmptyStringValue"/>
+    </element>
+  </define>
+
+  <define name="windowElement">
+    <element name="window">
+      <ref name="positionAttributes"/>
+      <attribute name="bpp">
+        <data type="positiveInteger">
+          <param name="maxInclusive">32</param>
+        </data>
+      </attribute>
+    </element>
+  </define>
+
+  <!-- Individual attributes -->
+
+  <define name="arcAttribute">
+    <optional>
+      <attribute name="arc">
+        <data type="byte">
+          <param name="minInclusive">-8</param>
+          <param name="maxInclusive">8</param>
+        </data>
+      </attribute>
+    </optional>
+  </define>
+
+  <define name="delayAttribute">
+    <optional>
+      <attribute name="delay">
+        <data type="positiveInteger"/>
+      </attribute>
+    </optional>
+  </define>
+
+  <define name="refreshAttribute">
+    <optional>
+      <attribute name="refresh">
+        <choice>
+          <value>always</value>
+          <value>full</value>
+          <value>force</value>
+          <!-- TODO: *cough*... but for now generated with Python:
+               from itertools import permutations
+               refresh = ("all", "timeout", "update", "list", "scroll")
+               for i in range(1, len(refresh)+1):
+                   for j in permutations(refresh, i):
+                       print "        <value>%s</value>" % ",".join(j)
+          -->
+          <value>all</value>
+          <value>timeout</value>
+          <value>update</value>
+          <value>list</value>
+          <value>scroll</value>
+          <value>all,timeout</value>
+          <value>all,update</value>
+          <value>all,list</value>
+          <value>all,scroll</value>
+          <value>timeout,all</value>
+          <value>timeout,update</value>
+          <value>timeout,list</value>
+          <value>timeout,scroll</value>
+          <value>update,all</value>
+          <value>update,timeout</value>
+          <value>update,list</value>
+          <value>update,scroll</value>
+          <value>list,all</value>
+          <value>list,timeout</value>
+          <value>list,update</value>
+          <value>list,scroll</value>
+          <value>scroll,all</value>
+          <value>scroll,timeout</value>
+          <value>scroll,update</value>
+          <value>scroll,list</value>
+          <value>all,timeout,update</value>
+          <value>all,timeout,list</value>
+          <value>all,timeout,scroll</value>
+          <value>all,update,timeout</value>
+          <value>all,update,list</value>
+          <value>all,update,scroll</value>
+          <value>all,list,timeout</value>
+          <value>all,list,update</value>
+          <value>all,list,scroll</value>
+          <value>all,scroll,timeout</value>
+          <value>all,scroll,update</value>
+          <value>all,scroll,list</value>
+          <value>timeout,all,update</value>
+          <value>timeout,all,list</value>
+          <value>timeout,all,scroll</value>
+          <value>timeout,update,all</value>
+          <value>timeout,update,list</value>
+          <value>timeout,update,scroll</value>
+          <value>timeout,list,all</value>
+          <value>timeout,list,update</value>
+          <value>timeout,list,scroll</value>
+          <value>timeout,scroll,all</value>
+          <value>timeout,scroll,update</value>
+          <value>timeout,scroll,list</value>
+          <value>update,all,timeout</value>
+          <value>update,all,list</value>
+          <value>update,all,scroll</value>
+          <value>update,timeout,all</value>
+          <value>update,timeout,list</value>
+          <value>update,timeout,scroll</value>
+          <value>update,list,all</value>
+          <value>update,list,timeout</value>
+          <value>update,list,scroll</value>
+          <value>update,scroll,all</value>
+          <value>update,scroll,timeout</value>
+          <value>update,scroll,list</value>
+          <value>list,all,timeout</value>
+          <value>list,all,update</value>
+          <value>list,all,scroll</value>
+          <value>list,timeout,all</value>
+          <value>list,timeout,update</value>
+          <value>list,timeout,scroll</value>
+          <value>list,update,all</value>
+          <value>list,update,timeout</value>
+          <value>list,update,scroll</value>
+          <value>list,scroll,all</value>
+          <value>list,scroll,timeout</value>
+          <value>list,scroll,update</value>
+          <value>scroll,all,timeout</value>
+          <value>scroll,all,update</value>
+          <value>scroll,all,list</value>
+          <value>scroll,timeout,all</value>
+          <value>scroll,timeout,update</value>
+          <value>scroll,timeout,list</value>
+          <value>scroll,update,all</value>
+          <value>scroll,update,timeout</value>
+          <value>scroll,update,list</value>
+          <value>scroll,list,all</value>
+          <value>scroll,list,timeout</value>
+          <value>scroll,list,update</value>
+          <value>all,timeout,update,list</value>
+          <value>all,timeout,update,scroll</value>
+          <value>all,timeout,list,update</value>
+          <value>all,timeout,list,scroll</value>
+          <value>all,timeout,scroll,update</value>
+          <value>all,timeout,scroll,list</value>
+          <value>all,update,timeout,list</value>
+          <value>all,update,timeout,scroll</value>
+          <value>all,update,list,timeout</value>
+          <value>all,update,list,scroll</value>
+          <value>all,update,scroll,timeout</value>
+          <value>all,update,scroll,list</value>
+          <value>all,list,timeout,update</value>
+          <value>all,list,timeout,scroll</value>
+          <value>all,list,update,timeout</value>
+          <value>all,list,update,scroll</value>
+          <value>all,list,scroll,timeout</value>
+          <value>all,list,scroll,update</value>
+          <value>all,scroll,timeout,update</value>
+          <value>all,scroll,timeout,list</value>
+          <value>all,scroll,update,timeout</value>
+          <value>all,scroll,update,list</value>
+          <value>all,scroll,list,timeout</value>
+          <value>all,scroll,list,update</value>
+          <value>timeout,all,update,list</value>
+          <value>timeout,all,update,scroll</value>
+          <value>timeout,all,list,update</value>
+          <value>timeout,all,list,scroll</value>
+          <value>timeout,all,scroll,update</value>
+          <value>timeout,all,scroll,list</value>
+          <value>timeout,update,all,list</value>
+          <value>timeout,update,all,scroll</value>
+          <value>timeout,update,list,all</value>
+          <value>timeout,update,list,scroll</value>
+          <value>timeout,update,scroll,all</value>
+          <value>timeout,update,scroll,list</value>
+          <value>timeout,list,all,update</value>
+          <value>timeout,list,all,scroll</value>
+          <value>timeout,list,update,all</value>
+          <value>timeout,list,update,scroll</value>
+          <value>timeout,list,scroll,all</value>
+          <value>timeout,list,scroll,update</value>
+          <value>timeout,scroll,all,update</value>
+          <value>timeout,scroll,all,list</value>
+          <value>timeout,scroll,update,all</value>
+          <value>timeout,scroll,update,list</value>
+          <value>timeout,scroll,list,all</value>
+          <value>timeout,scroll,list,update</value>
+          <value>update,all,timeout,list</value>
+          <value>update,all,timeout,scroll</value>
+          <value>update,all,list,timeout</value>
+          <value>update,all,list,scroll</value>
+          <value>update,all,scroll,timeout</value>
+          <value>update,all,scroll,list</value>
+          <value>update,timeout,all,list</value>
+          <value>update,timeout,all,scroll</value>
+          <value>update,timeout,list,all</value>
+          <value>update,timeout,list,scroll</value>
+          <value>update,timeout,scroll,all</value>
+          <value>update,timeout,scroll,list</value>
+          <value>update,list,all,timeout</value>
+          <value>update,list,all,scroll</value>
+          <value>update,list,timeout,all</value>
+          <value>update,list,timeout,scroll</value>
+          <value>update,list,scroll,all</value>
+          <value>update,list,scroll,timeout</value>
+          <value>update,scroll,all,timeout</value>
+          <value>update,scroll,all,list</value>
+          <value>update,scroll,timeout,all</value>
+          <value>update,scroll,timeout,list</value>
+          <value>update,scroll,list,all</value>
+          <value>update,scroll,list,timeout</value>
+          <value>list,all,timeout,update</value>
+          <value>list,all,timeout,scroll</value>
+          <value>list,all,update,timeout</value>
+          <value>list,all,update,scroll</value>
+          <value>list,all,scroll,timeout</value>
+          <value>list,all,scroll,update</value>
+          <value>list,timeout,all,update</value>
+          <value>list,timeout,all,scroll</value>
+          <value>list,timeout,update,all</value>
+          <value>list,timeout,update,scroll</value>
+          <value>list,timeout,scroll,all</value>
+          <value>list,timeout,scroll,update</value>
+          <value>list,update,all,timeout</value>
+          <value>list,update,all,scroll</value>
+          <value>list,update,timeout,all</value>
+          <value>list,update,timeout,scroll</value>
+          <value>list,update,scroll,all</value>
+          <value>list,update,scroll,timeout</value>
+          <value>list,scroll,all,timeout</value>
+          <value>list,scroll,all,update</value>
+          <value>list,scroll,timeout,all</value>
+          <value>list,scroll,timeout,update</value>
+          <value>list,scroll,update,all</value>
+          <value>list,scroll,update,timeout</value>
+          <value>scroll,all,timeout,update</value>
+          <value>scroll,all,timeout,list</value>
+          <value>scroll,all,update,timeout</value>
+          <value>scroll,all,update,list</value>
+          <value>scroll,all,list,timeout</value>
+          <value>scroll,all,list,update</value>
+          <value>scroll,timeout,all,update</value>
+          <value>scroll,timeout,all,list</value>
+          <value>scroll,timeout,update,all</value>
+          <value>scroll,timeout,update,list</value>
+          <value>scroll,timeout,list,all</value>
+          <value>scroll,timeout,list,update</value>
+          <value>scroll,update,all,timeout</value>
+          <value>scroll,update,all,list</value>
+          <value>scroll,update,timeout,all</value>
+          <value>scroll,update,timeout,list</value>
+          <value>scroll,update,list,all</value>
+          <value>scroll,update,list,timeout</value>
+          <value>scroll,list,all,timeout</value>
+          <value>scroll,list,all,update</value>
+          <value>scroll,list,timeout,all</value>
+          <value>scroll,list,timeout,update</value>
+          <value>scroll,list,update,all</value>
+          <value>scroll,list,update,timeout</value>
+          <value>all,timeout,update,list,scroll</value>
+          <value>all,timeout,update,scroll,list</value>
+          <value>all,timeout,list,update,scroll</value>
+          <value>all,timeout,list,scroll,update</value>
+          <value>all,timeout,scroll,update,list</value>
+          <value>all,timeout,scroll,list,update</value>
+          <value>all,update,timeout,list,scroll</value>
+          <value>all,update,timeout,scroll,list</value>
+          <value>all,update,list,timeout,scroll</value>
+          <value>all,update,list,scroll,timeout</value>
+          <value>all,update,scroll,timeout,list</value>
+          <value>all,update,scroll,list,timeout</value>
+          <value>all,list,timeout,update,scroll</value>
+          <value>all,list,timeout,scroll,update</value>
+          <value>all,list,update,timeout,scroll</value>
+          <value>all,list,update,scroll,timeout</value>
+          <value>all,list,scroll,timeout,update</value>
+          <value>all,list,scroll,update,timeout</value>
+          <value>all,scroll,timeout,update,list</value>
+          <value>all,scroll,timeout,list,update</value>
+          <value>all,scroll,update,timeout,list</value>
+          <value>all,scroll,update,list,timeout</value>
+          <value>all,scroll,list,timeout,update</value>
+          <value>all,scroll,list,update,timeout</value>
+          <value>timeout,all,update,list,scroll</value>
+          <value>timeout,all,update,scroll,list</value>
+          <value>timeout,all,list,update,scroll</value>
+          <value>timeout,all,list,scroll,update</value>
+          <value>timeout,all,scroll,update,list</value>
+          <value>timeout,all,scroll,list,update</value>
+          <value>timeout,update,all,list,scroll</value>
+          <value>timeout,update,all,scroll,list</value>
+          <value>timeout,update,list,all,scroll</value>
+          <value>timeout,update,list,scroll,all</value>
+          <value>timeout,update,scroll,all,list</value>
+          <value>timeout,update,scroll,list,all</value>
+          <value>timeout,list,all,update,scroll</value>
+          <value>timeout,list,all,scroll,update</value>
+          <value>timeout,list,update,all,scroll</value>
+          <value>timeout,list,update,scroll,all</value>
+          <value>timeout,list,scroll,all,update</value>
+          <value>timeout,list,scroll,update,all</value>
+          <value>timeout,scroll,all,update,list</value>
+          <value>timeout,scroll,all,list,update</value>
+          <value>timeout,scroll,update,all,list</value>
+          <value>timeout,scroll,update,list,all</value>
+          <value>timeout,scroll,list,all,update</value>
+          <value>timeout,scroll,list,update,all</value>
+          <value>update,all,timeout,list,scroll</value>
+          <value>update,all,timeout,scroll,list</value>
+          <value>update,all,list,timeout,scroll</value>
+          <value>update,all,list,scroll,timeout</value>
+          <value>update,all,scroll,timeout,list</value>
+          <value>update,all,scroll,list,timeout</value>
+          <value>update,timeout,all,list,scroll</value>
+          <value>update,timeout,all,scroll,list</value>
+          <value>update,timeout,list,all,scroll</value>
+          <value>update,timeout,list,scroll,all</value>
+          <value>update,timeout,scroll,all,list</value>
+          <value>update,timeout,scroll,list,all</value>
+          <value>update,list,all,timeout,scroll</value>
+          <value>update,list,all,scroll,timeout</value>
+          <value>update,list,timeout,all,scroll</value>
+          <value>update,list,timeout,scroll,all</value>
+          <value>update,list,scroll,all,timeout</value>
+          <value>update,list,scroll,timeout,all</value>
+          <value>update,scroll,all,timeout,list</value>
+          <value>update,scroll,all,list,timeout</value>
+          <value>update,scroll,timeout,all,list</value>
+          <value>update,scroll,timeout,list,all</value>
+          <value>update,scroll,list,all,timeout</value>
+          <value>update,scroll,list,timeout,all</value>
+          <value>list,all,timeout,update,scroll</value>
+          <value>list,all,timeout,scroll,update</value>
+          <value>list,all,update,timeout,scroll</value>
+          <value>list,all,update,scroll,timeout</value>
+          <value>list,all,scroll,timeout,update</value>
+          <value>list,all,scroll,update,timeout</value>
+          <value>list,timeout,all,update,scroll</value>
+          <value>list,timeout,all,scroll,update</value>
+          <value>list,timeout,update,all,scroll</value>
+          <value>list,timeout,update,scroll,all</value>
+          <value>list,timeout,scroll,all,update</value>
+          <value>list,timeout,scroll,update,all</value>
+          <value>list,update,all,timeout,scroll</value>
+          <value>list,update,all,scroll,timeout</value>
+          <value>list,update,timeout,all,scroll</value>
+          <value>list,update,timeout,scroll,all</value>
+          <value>list,update,scroll,all,timeout</value>
+          <value>list,update,scroll,timeout,all</value>
+          <value>list,scroll,all,timeout,update</value>
+          <value>list,scroll,all,update,timeout</value>
+          <value>list,scroll,timeout,all,update</value>
+          <value>list,scroll,timeout,update,all</value>
+          <value>list,scroll,update,all,timeout</value>
+          <value>list,scroll,update,timeout,all</value>
+          <value>scroll,all,timeout,update,list</value>
+          <value>scroll,all,timeout,list,update</value>
+          <value>scroll,all,update,timeout,list</value>
+          <value>scroll,all,update,list,timeout</value>
+          <value>scroll,all,list,timeout,update</value>
+          <value>scroll,all,list,update,timeout</value>
+          <value>scroll,timeout,all,update,list</value>
+          <value>scroll,timeout,all,list,update</value>
+          <value>scroll,timeout,update,all,list</value>
+          <value>scroll,timeout,update,list,all</value>
+          <value>scroll,timeout,list,all,update</value>
+          <value>scroll,timeout,list,update,all</value>
+          <value>scroll,update,all,timeout,list</value>
+          <value>scroll,update,all,list,timeout</value>
+          <value>scroll,update,timeout,all,list</value>
+          <value>scroll,update,timeout,list,all</value>
+          <value>scroll,update,list,all,timeout</value>
+          <value>scroll,update,list,timeout,all</value>
+          <value>scroll,list,all,timeout,update</value>
+          <value>scroll,list,all,update,timeout</value>
+          <value>scroll,list,timeout,all,update</value>
+          <value>scroll,list,timeout,update,all</value>
+          <value>scroll,list,update,all,timeout</value>
+          <value>scroll,list,update,timeout,all</value>
+        </choice>
+      </attribute>
+    </optional>
+  </define>
+
+  <!-- Attribute collections -->
+
+  <define name="commonAttributes">
+    <optional>
+      <attribute name="condition">
+        <ref name="nonEmptyNormalizedStringValue"/>
+      </attribute>
+    </optional>
+    <ref name="refreshAttribute"/>
+    <optional>
+      <attribute name="changed">
+        <ref name="nonEmptyNormalizedStringValue"/>
+      </attribute>
+    </optional>
+  </define>
+
+  <define name="positionAttributes">
+    <optional>
+      <attribute name="x1">
+        <ref name="xValue"/>
+      </attribute>
+    </optional>
+    <optional>
+      <attribute name="y1">
+        <ref name="yValue"/>
+      </attribute>
+    </optional>
+    <optional>
+      <attribute name="x2">
+        <ref name="xValue"/>
+      </attribute>
+    </optional>
+    <optional>
+      <attribute name="y2">
+        <ref name="yValue"/>
+      </attribute>
+    </optional>
+  </define>
+
+  <define name="textAttributes">
+    <ref name="positionAttributes"/>
+    <ref name="commonAttributes"/>
+    <optional>
+      <attribute name="color">
+        <ref name="colorValue"/>
+      </attribute>
+    </optional>
+    <optional>
+      <attribute name="bgColor">
+        <ref name="colorValue"/>
+      </attribute>
+    </optional>
+    <optional>
+      <attribute name="align">
+        <choice>
+          <value>center</value>
+          <value>right</value>
+          <value>left</value>
+        </choice>
+      </attribute>
+    </optional>
+    <optional>
+      <attribute name="font">
+        <data type="normalizedString">
+          <param name="pattern">[^@]+(@\d+(,\d+)?)?</param>
+        </data>
+      </attribute>
+    </optional>
+  </define>
+
+  <define name="widthHeightAttributes">
+    <optional>
+      <attribute name="w">
+        <!-- TODO -->
+        <ref name="xValue"/>
+      </attribute>
+    </optional>
+    <optional>
+      <attribute name="h">
+        <!-- TODO -->
+        <ref name="yValue"/>
+      </attribute>
+    </optional>
+  </define>
+
+  <!-- Values -->
+
+  <define name="colorValue">
+    <!-- #AARRGGBB (hex) or symbolic name from *.colors (can't check) -->
+    <ref name="nonEmptyNormalizedStringValue"/>
+  </define>
+
+  <define name="nonEmptyNormalizedStringValue">
+    <data type="normalizedString">
+      <param name="minLength">1</param>
+    </data>
+  </define>
+
+  <define name="nonEmptyStringValue">
+    <data type="string">
+      <param name="minLength">1</param>
+    </data>
+  </define>
+
+  <define name="xValue">
+    <data type="integer">
+      <!-- TODO -->
+      <param name="minInclusive">-2000</param>
+      <param name="maxInclusive">2000</param>
+    </data>
+  </define>
+
+  <define name="yValue">
+    <data type="integer">
+      <!-- TODO -->
+      <param name="minInclusive">-2000</param>
+      <param name="maxInclusive">2000</param>
+    </data>
+  </define>
+
+</grammar>
diff --git a/HISTORY b/HISTORY
index d68ae1c..c3ba46b 100644
--- a/HISTORY
+++ b/HISTORY
@@ -5,6 +5,7 @@ VDR Plugin 'text2skin' Revision History
 
 - Fix build with ImageMagick >= 6.6.2 (thanks to Anssi Hannula / closes #409)
 - Documentation spelling fixes.
+- Added experimental RELAX NG schema for skin XML files.
 
 2010-06-21: Version 1.3.1