Add XML validation scripts

The basic structure of the regular translation file has been codified as
schema/translation.xsd while the structure of the one-per-locale
properties.xml is codified in schema/properties.xsd.

A validation shell script has been included as ./validate.sh that checks
that all the XML files are valid and match the corresponding schema.
More checks can be added later such as making keys corresponding to
known integral values also have (sane?) integral values.

Author: mqudsi

schema/properties.xsd

@@ -0,0 +1,17 @@
+<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
+  <xs:element name="localization">
+	<xs:complexType>
+	  <xs:sequence>
+		<xs:element name="locale">
+		  <xs:complexType>
+			<xs:sequence>
+			  <xs:element name="name" type="xs:string"/>
+			  <xs:element name="rtl" type="xs:boolean"/>
+			  <xs:element name="parentLocale" type="xs:string"/>
+			</xs:sequence>
+		  </xs:complexType>
+		</xs:element>
+	  </xs:sequence>
+	</xs:complexType>
+  </xs:element>
+</xs:schema>

schema/translation.xsd

@@ -0,0 +1,30 @@
+<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
+  <xs:attributeGroup name="entryGroup">
+	<xs:attribute name="key" type="xs:string"/>
+	<xs:attribute name="value" type="xs:string"/>
+	<xs:attribute name="version" type="xs:byte"/>
+	<xs:attribute name="clone" type="xs:string"/>
+	<xs:attribute name="derive" type="xs:boolean"/>
+  </xs:attributeGroup>
+  <xs:element name="localization">
+	<xs:complexType>
+	  <xs:sequence>
+		<xs:element name="strings">
+		  <xs:complexType>
+			<xs:sequence>
+			  <xs:element name="string" maxOccurs="unbounded" minOccurs="1">
+				<xs:complexType>
+				  <xs:simpleContent>
+					<xs:extension base="xs:string">
+					  <xs:attributeGroup ref="entryGroup"/>
+					</xs:extension>
+				  </xs:simpleContent>
+				</xs:complexType>
+			  </xs:element>
+			</xs:sequence>
+		  </xs:complexType>
+		</xs:element>
+	  </xs:sequence>
+	</xs:complexType>
+  </xs:element>
+</xs:schema>

validate.sh

@@ -0,0 +1,20 @@
+#!/bin/sh
+
+xmlvalidate() {
+	schema=$1
+	file=$2
+
+	result=$(xmllint --schema $schema --encode utf-8 --noout "$file" 2>&1)
+	status=$?
+	if test $status -ne 0; then
+		echo $result 1>&2
+	fi
+}
+
+for file in $(find . -iname "*.xml" ! -iname "properties.xml"); do
+	xmlvalidate ./schema/translation.xsd  $file
+done
+
+for file in $(find -iname "properties.xml"); do
+	xmlvalidate ./schema/properties.xsd $file
+done