Not sure if this is official but I found this here.:
<?xml version="1.0" ?>
<!--
Copyright (c) 2004 on behalf of the EU EGEE Project:
The European Organization for Nuclear Research (CERN),
Istituto Nazionale di Fisica Nucleare (INFN), Italy
Datamat Spa, Italy
Centre National de la Recherche Scientifique (CNRS), France
CS Systeme d'Information (CSSI), France
Royal Institute of Technology, Center for Parallel Computers (KTH-PDC), Sweden
Universiteit van Amsterdam (UvA), Netherlands
University of Helsinki (UH.HIP), Finland
University of Bergen (UiB), Norway
Council for the Central Laboratory of the Research Councils (CCLRC), United Kingdom
XML Schema to validate the output of XUnit frameworks
Authors: David Collados <david.collados@cern.ch>
-->
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:targetNamespace="http://www.eu-egee.org/gLite/Tools/Testing">
<xsd:annotation>
<xsd:documentation xml:lang="en">
XML Schema for XUnit tests output
</xsd:documentation>
</xsd:annotation>
<xsd:element name="testsuite">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="properties" type="propertiesType" minOccurs="0" maxOccurs="unbounded" />
<xsd:element name="testcase" type="testCaseType" minOccurs="1" maxOccurs="unbounded" />
<xsd:element name="system-out" type="xsd:string" minOccurs="1" maxOccurs="1" />
<xsd:element name="system-err" type="xsd:string" minOccurs="1" maxOccurs="1" />
</xsd:sequence>
<xsd:attribute name="name" type="xsd:string" />
<xsd:attribute name="tests" type="xsd:integer" />
<xsd:attribute name="failures" type="xsd:integer" />
<xsd:attribute name="errors" type="xsd:integer" />
<xsd:attribute name="time" type="xsd:float" />
</xsd:complexType>
</xsd:element>
<xsd:complexType name="propertiesType">
<xsd:sequence>
<xsd:element name="property" type="propertyType" minOccurs="0" maxOccurs="unbounded" />
</xsd:sequence>
</xsd:complexType>
<xsd:complexType name="propertyType">
<xsd:attribute name="name" type="xsd:string" />
<xsd:attribute name="value" type="xsd:string" />
</xsd:complexType>
<xsd:complexType name="testCaseType">
<xsd:sequence>
<xsd:element name="failure" type="failureType" minOccurs="0" maxOccurs="1" />
<xsd:element name="error" type="errorType" minOccurs="0" maxOccurs="1" />
</xsd:sequence>
<xsd:attribute name="classname" type="xsd:string" />
<xsd:attribute name="name" type="xsd:string" />
<xsd:attribute name="time" type="xsd:float" />
</xsd:complexType>
<xsd:complexType name="failureType">
<xsd:simpleContent>
<xsd:extension base="xsd:string">
<xsd:attribute name="type" type="xsd:string" />
<xsd:attribute name="message" type="xsd:string" />
</xsd:extension>
</xsd:simpleContent>
</xsd:complexType>
<xsd:complexType name="errorType">
<xsd:simpleContent>
<xsd:extension base="xsd:string">
<xsd:attribute name="type" type="xsd:string" />
<xsd:attribute name="message" type="xsd:string" />
</xsd:extension>
</xsd:simpleContent>
</xsd:complexType>
</xsd:schema>
