From 21c2fb8ff41267334fd0469de26d493f3fe4ef3b Mon Sep 17 00:00:00 2001
From: Aron Roberts <aron@socrates.berkeley.edu>
Date: Mon, 16 Mar 2009 20:12:40 +0000
Subject: [PATCH] Removed extraneous files, leaving just one set of current
 files - RELAX NG schema, generated W3C XML Schema, and sample XML instance
 document - for collectionObject, collectionObjects (a list of zero or more
 collectionObject(s)), and serviceErrorResponse. Added a utility script for
 validating W3C XML Schema documents via XMLStarlet. Made all
 defaultCollectionObject elements required, although their values may be blank
 (empty).

---
 .../aron/schema/collectionObject-full-ns.rng  | 277 ------------------
 sandbox/aron/schema/collectionObject-full.rng | 270 -----------------
 .../schema/collectionObject-ns-no-prefix.xsd  | 166 -----------
 sandbox/aron/schema/collectionObject-ns.xml   |  86 ------
 sandbox/aron/schema/collectionObject-ns.xsd   | 165 -----------
 sandbox/aron/schema/collectionObject.rng      | 239 ++++++++++++++-
 sandbox/aron/schema/collectionObject.xml      |  18 +-
 sandbox/aron/schema/collectionObject.xsd      |  32 +-
 sandbox/aron/schema/collectionObjects.rng     |   5 +-
 .../aron/schema/defaultCollectionObject.rng   | 120 --------
 sandbox/aron/schema/rng-to-xsd.sh             |   4 +
 .../aron/schema/sampleMmiCollectionObject.rng | 102 -------
 sandbox/aron/schema/serviceMetadata.rng       | 133 ---------
 sandbox/aron/schema/validate-rng.sh           |   4 +
 sandbox/aron/schema/validate-xsd.sh           |  23 ++
 15 files changed, 289 insertions(+), 1355 deletions(-)
 delete mode 100644 sandbox/aron/schema/collectionObject-full-ns.rng
 delete mode 100644 sandbox/aron/schema/collectionObject-full.rng
 delete mode 100644 sandbox/aron/schema/collectionObject-ns-no-prefix.xsd
 delete mode 100644 sandbox/aron/schema/collectionObject-ns.xml
 delete mode 100644 sandbox/aron/schema/collectionObject-ns.xsd
 delete mode 100644 sandbox/aron/schema/defaultCollectionObject.rng
 delete mode 100644 sandbox/aron/schema/sampleMmiCollectionObject.rng
 delete mode 100644 sandbox/aron/schema/serviceMetadata.rng
 create mode 100644 sandbox/aron/schema/validate-xsd.sh

diff --git a/sandbox/aron/schema/collectionObject-full-ns.rng b/sandbox/aron/schema/collectionObject-full-ns.rng
deleted file mode 100644
index 90bb33583..000000000
--- a/sandbox/aron/schema/collectionObject-full-ns.rng
+++ /dev/null
@@ -1,277 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-
-<!--
-
-	collectionObject-full-ns.rng
-	
-	A schema defining the structure of an CollectionObject entity.
-		
-	This schema includes all of its components, rather than referring
-	to them via 'externalRef' references. As such, it can be used as the
-	basis for generating a W3C XML Schema (XSD) schema, via
-	James Clark's Trang utility (http://http://www.thaiopensource.com/relaxng/trang.html).
-	(Trang version 20081028 can't resolve such references.) 
-	
-	As a convenience, a 'rng-to-xsd.sh' script file, which trivially wraps Trang
-	to generate XSD from a RELAX NG schema, is provided elsewhere in this distribution.
-	
-	This schema also includes one rudimentary root namespace, scoped for the Release 0.1
-	"Hello World" demo.  We'll need to determine whether, and if so how, we can
-	accommodate multiple namespaces to compose entity objects from various schemas,
-	such as service metadata, and declarations for the default entity, a domain- or community-
-	provided entity, and site- or instance-specific version of an entity.
-
-	This schema was created for the CollectionSpace system,
-	http://www.collectionspace.org/
-	
-	It is written in the XML syntax of the RELAX NG schema language,
-	http://relaxng.org/
-	
-  $Author: aron $
-  $Revision: 57 $
-  $Date: 2009-03-05 16:06:06 -0800 (Thu, 05 Mar 2009) $
-
--->
-
-<element
-	name="collectionObject"
-	ns="http://collectionspace.org/hello"
-	xmlns="http://relaxng.org/ns/structure/1.0"
-	datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
-	
-	
-	<!-- ######################################################################## -->
-	<!-- Service Metadata                                                         -->
-	<!-- ######################################################################## -->
-	
-	<!--
-		Data elements common to every entity object in the CollectionSpace system.
-		
-		This is an quickly conceived-of list for the Release 0.1 "Hello World" demo,
-		and is not intended to be definitive going forward; further definition
-		will be required.
-	-->
-	
-	<element
-		name="serviceMetadata">
-		
-		<!--
-			A unique CollectionSpace system identifier (ID) for this
-			entity record.  This is distinguished from any museum-created
-			or other identifiers that might also be associated with it.
-				
-			Note: We may wish to think further about what this element name should be.
-		-->
-		<element name="collectionSpaceId">
-			<!--
-				Note: We may potentially wish to specify a regex-type pattern
-				here for further validating these IDs.
-			-->
-			<data type="string" />
-		</element>
-		
-		<!--
-			All of the data elements after this point are fully optional.
-			
-			It's possible we may never want or need to pass these in
-			routine message payloads, and if so, this merely constitutes
-			notes/documentation on a few representative types of data that
-			we might additionally store as system metadata, beyond an identifier.
-			
-			It's also possible that we might offer a service to provide this
-			system metadata for any object, so that, for instance, a client
-			might be able to retrieve the full modification history for an object.
-			This *may* even already be envisioned for an already defined or
-			candidate service ...
-		-->
-		
-			<!-- ######################### -->
-			<!-- Creation                  -->
-			<!-- ######################### -->
-		
-			<!--
-				A timestamp for the creation of this entity record, as specified in
-				http://www.w3.org/TR/xmlschema-2/#dateTime
-			-->
-			<optional>
-				<element name="created">
-					<choice>
-						<data type="dateTime" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-		
-			<!-- The system Principal that created this entity record -->
-			<optional>
-				<element name="createdBy">
-					<choice>
-						<data type="string" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-	
-			<!-- 
-				Note: Do we also need 'acting as designate for' information here,
-				for cases where one system Principal created this entity while
-				acting as a designate for another Principal?
-			-->
-		
-			<!-- ######################### -->
-			<!-- Last modification         -->
-			<!-- ######################### -->
-			
-			<!--
-				A timestamp for the last modification of this entity record, as specified in
-				http://www.w3.org/TR/xmlschema-2/#dateTime
-			-->
-			<optional>
-				<element name="lastModified">
-					<choice>
-						<data type="dateTime" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-		
-			<!-- The system Principal that created this entity record -->
-			<optional>
-				<element name="lastModifiedBy">
-					<choice>
-						<data type="string" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-	
-			<!-- 
-				Note: Do we also need 'acting as designate for' information here,
-				for cases where one system Principal modified this entity while
-				acting as a designate for another Principal?
-			-->
-	
-			<!-- ######################### -->
-			<!-- Valid from/to             -->
-			<!-- ######################### -->
-			
-			<!--
-				Patrick mentioned the concept of 'valid to/from' timestamps.
-				If this applied to entity objects, not to schema, we might
-				explore that further as another possible type of system metadata. 
-			-->
-			
-	</element>
-
-
-	<!-- ######################################################################## -->
-	<!-- Default CollectionObject                                                 -->
-	<!-- ######################################################################## -->
-
-	<!-- The default CollectionSpace schema for an entity object (extremely simplified). -->
-
-	<element
-		name="defaultCollectionObject">
-		
-		<!--
-			The following data elements are taken from the Basic section,
-			Object ID Information sub-section, of the Object Data Entry wireframe
-			
-			See:
-			
-			http://wiki.collectionspace.org/display/collectionspace/Wireframes+-+Object+Data+Entry
-			and
-			http://wiki.collectionspace.org/display/collectionspace/Hello+World+(Release+0.1)+Functionality+Requirements
-			
-		-->
-	
-		<!-- Allows child elements to appear in any order -->
-		<interleave>
-		
-			<element name="objectNumber">
-				<!--
-					This declaration specifies that the value of this element must never be empty (blank).
-					If that's not accurate, it should be redefined, perhaps to match other elements below.
-					
-					Note: In a site- or instance-specific declaration - not in the default
-					definition here - we might wish to specify a regex-type pattern here for
-					further constraining valid object numbers.
-				-->
-				<data type="normalizedString">
-					<param name="minLength">1</param>
-				</data>
-			</element>
-	
-			<optional>
-				<element name="otherNumber">
-					<choice>
-						<data type="string" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-			
-			<optional>
-				<element name="briefDescription">
-					<choice>
-						<data type="string" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-			
-			<optional>
-				<element name="comments">
-					<choice>
-						<data type="string" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-			
-			<optional>
-				<element name="distinguishingFeatures">
-					<choice>
-						<data type="string" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-			
-			<optional>
-				<element name="objectName">
-					<choice>
-						<data type="string" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-			
-			<optional>
-				<element name="responsibleDepartment">
-					<choice>
-						<data type="string" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-			
-			<optional>
-				<element name="title">
-					<choice>
-						<data type="string" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-	
-		</interleave>
-				
-	</element>	
-
-	<!-- A domain- or community-provided schema, if available, would go here -->
-	
-	<!-- An site- or instance-provided schema, if available, would go here. -->
-	
-    
-</element>
diff --git a/sandbox/aron/schema/collectionObject-full.rng b/sandbox/aron/schema/collectionObject-full.rng
deleted file mode 100644
index 2c59821ab..000000000
--- a/sandbox/aron/schema/collectionObject-full.rng
+++ /dev/null
@@ -1,270 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-
-<!--
-
-	collectionObject-full.rng
-	
-	A schema defining the structure of an CollectionObject entity.
-	
-	This schema includes all of its components, rather than referring
-	to them via 'externalRef' references. As such, it can be used as the
-	basis for generating a W3C XML Schema (XSD) schema, via
-	James Clark's Trang utility (http://http://www.thaiopensource.com/relaxng/trang.html).
-	(Trang version 20081028 can't resolve such references.) 
-	
-	As a convenience, a 'rng-to-xsd.sh' script file, which trivially wraps Trang
-	to generate XSD from a RELAX NG schema, is provided elsewhere in this distribution.
-
-	This schema was created for the CollectionSpace system,
-	http://www.collectionspace.org/
-	
-	It is written in the XML syntax of the RELAX NG schema language,
-	http://relaxng.org/
-	
-  $Author: aron $
-  $Revision: 57 $
-  $Date: 2009-03-05 16:06:06 -0800 (Thu, 05 Mar 2009) $
-
--->
-
-<element
-	name="collectionObject"
-	xmlns="http://relaxng.org/ns/structure/1.0"
-	datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
-
-	
-	<!-- ######################################################################## -->
-	<!-- Service Metadata                                                         -->
-	<!-- ######################################################################## -->
-	
-	<!--
-		Data elements common to every entity object in the CollectionSpace system.
-		
-		This is an quickly conceived-of list for the Release 0.1 "Hello World" demo,
-		and is not intended to be definitive going forward; further definition
-		will be required.
-	-->
-	
-	<element
-		name="serviceMetadata">
-		
-		<!--
-			A unique CollectionSpace system identifier (ID) for this
-			entity record.  This is distinguished from any museum-created
-			or other identifiers that might also be associated with it.
-				
-			Note: We may wish to think further about what this element name should be.
-		-->
-		<element name="collectionSpaceId">
-			<!--
-				Note: We may potentially wish to specify a regex-type pattern
-				here for further validating these IDs.
-			-->
-			<data type="string" />
-		</element>
-		
-		<!--
-			All of the data elements after this point are fully optional.
-			
-			It's possible we may never want or need to pass these in
-			routine message payloads, and if so, this merely constitutes
-			notes/documentation on a few representative types of data that
-			we might additionally store as system metadata, beyond an identifier.
-			
-			It's also possible that we might offer a service to provide this
-			system metadata for any object, so that, for instance, a client
-			might be able to retrieve the full modification history for an object.
-			This *may* even already be envisioned for an already defined or
-			candidate service ...
-		-->
-		
-			<!-- ######################### -->
-			<!-- Creation                  -->
-			<!-- ######################### -->
-		
-			<!--
-				A timestamp for the creation of this entity record, as specified in
-				http://www.w3.org/TR/xmlschema-2/#dateTime
-			-->
-			<optional>
-				<element name="created">
-					<choice>
-						<data type="dateTime" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-		
-			<!-- The system Principal that created this entity record -->
-			<optional>
-				<element name="createdBy">
-					<choice>
-						<data type="string" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-	
-			<!-- 
-				Note: Do we also need 'acting as designate for' information here,
-				for cases where one system Principal created this entity while
-				acting as a designate for another Principal?
-			-->
-		
-			<!-- ######################### -->
-			<!-- Last modification         -->
-			<!-- ######################### -->
-			
-			<!--
-				A timestamp for the last modification of this entity record, as specified in
-				http://www.w3.org/TR/xmlschema-2/#dateTime
-			-->
-			<optional>
-				<element name="lastModified">
-					<choice>
-						<data type="dateTime" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-		
-			<!-- The system Principal that created this entity record -->
-			<optional>
-				<element name="lastModifiedBy">
-					<choice>
-						<data type="string" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-	
-			<!-- 
-				Note: Do we also need 'acting as designate for' information here,
-				for cases where one system Principal modified this entity while
-				acting as a designate for another Principal?
-			-->
-	
-			<!-- ######################### -->
-			<!-- Valid from/to             -->
-			<!-- ######################### -->
-			
-			<!--
-				Patrick mentioned the concept of 'valid to/from' timestamps.
-				If this applied to entity objects, not to schema, we might
-				explore that further as another possible type of system metadata. 
-			-->
-			
-	</element>
-
-
-	<!-- ######################################################################## -->
-	<!-- Default CollectionObject                                                 -->
-	<!-- ######################################################################## -->
-
-	<!-- The default CollectionSpace schema for an entity object (extremely simplified). -->
-
-	<element
-		name="defaultCollectionObject">
-		
-		<!--
-			The following data elements are taken from the Basic section,
-			Object ID Information sub-section, of the Object Data Entry wireframe
-			
-			See:
-			
-			http://wiki.collectionspace.org/display/collectionspace/Wireframes+-+Object+Data+Entry
-			and
-			http://wiki.collectionspace.org/display/collectionspace/Hello+World+(Release+0.1)+Functionality+Requirements
-			
-		-->
-	
-		<!-- Allows child elements to appear in any order -->
-		<interleave>
-		
-			<element name="objectNumber">
-				<!--
-					This declaration specifies that the value of this element must never be empty (blank).
-					If that's not accurate, it should be redefined, perhaps to match other elements below.
-					
-					Note: In a site- or instance-specific declaration - not in the default
-					definition here - we might wish to specify a regex-type pattern here for
-					further constraining valid object numbers.
-				-->
-				<data type="normalizedString">
-					<param name="minLength">1</param>
-				</data>
-			</element>
-	
-			<optional>
-				<element name="otherNumber">
-					<choice>
-						<data type="string" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-			
-			<optional>
-				<element name="briefDescription">
-					<choice>
-						<data type="string" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-			
-			<optional>
-				<element name="comments">
-					<choice>
-						<data type="string" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-			
-			<optional>
-				<element name="distinguishingFeatures">
-					<choice>
-						<data type="string" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-			
-			<optional>
-				<element name="objectName">
-					<choice>
-						<data type="string" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-			
-			<optional>
-				<element name="responsibleDepartment">
-					<choice>
-						<data type="string" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-			
-			<optional>
-				<element name="title">
-					<choice>
-						<data type="string" />
-						<empty />
-					</choice>
-				</element>
-			</optional>
-	
-		</interleave>
-				
-	</element>	
-
-	<!-- A domain- or community-provided schema, if available, would go here -->
-	
-	<!-- An site- or instance-provided schema, if available, would go here. -->
-	
-    
-</element>
diff --git a/sandbox/aron/schema/collectionObject-ns-no-prefix.xsd b/sandbox/aron/schema/collectionObject-ns-no-prefix.xsd
deleted file mode 100644
index afeeac6c2..000000000
--- a/sandbox/aron/schema/collectionObject-ns-no-prefix.xsd
+++ /dev/null
@@ -1,166 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" targetNamespace="http://collectionspace.org/hello" xmlns="http://collectionspace.org/hello"
-version="0.1">
-  <xs:element name="collectionObject">
-    <xs:complexType>
-      <xs:sequence>
-        <xs:element ref="serviceMetadata"/>
-        <xs:element ref="defaultCollectionObject"/>
-      </xs:sequence>
-    </xs:complexType>
-  </xs:element>
-  <xs:element name="serviceMetadata">
-    <xs:complexType>
-      <xs:sequence>
-        <xs:element ref="collectionSpaceId"/>
-        <xs:element minOccurs="0" ref="created"/>
-        <xs:element minOccurs="0" ref="createdBy"/>
-        <xs:element minOccurs="0" ref="lastModified"/>
-        <xs:element minOccurs="0" ref="lastModifiedBy"/>
-      </xs:sequence>
-    </xs:complexType>
-  </xs:element>
-  <xs:element name="collectionSpaceId" type="xs:string"/>
-  <xs:element name="created">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:dateTime">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="createdBy">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:string">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="lastModified">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:dateTime">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="lastModifiedBy">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:string">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="defaultCollectionObject">
-    <xs:complexType>
-      <xs:all>
-        <xs:element ref="objectNumber"/>
-        <xs:element minOccurs="0" ref="otherNumber"/>
-        <xs:element minOccurs="0" ref="briefDescription"/>
-        <xs:element minOccurs="0" ref="comments"/>
-        <xs:element minOccurs="0" ref="distinguishingFeatures"/>
-        <xs:element minOccurs="0" ref="objectName"/>
-        <xs:element minOccurs="0" ref="responsibleDepartment"/>
-        <xs:element minOccurs="0" ref="title"/>
-      </xs:all>
-    </xs:complexType>
-  </xs:element>
-  <xs:element name="objectNumber">
-    <xs:simpleType>
-      <xs:restriction base="xs:normalizedString">
-        <xs:minLength value="1"/>
-      </xs:restriction>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="otherNumber">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:string">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="briefDescription">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:string">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="comments">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:string">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="distinguishingFeatures">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:string">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="objectName">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:string">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="responsibleDepartment">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:string">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="title">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:string">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-</xs:schema>
diff --git a/sandbox/aron/schema/collectionObject-ns.xml b/sandbox/aron/schema/collectionObject-ns.xml
deleted file mode 100644
index 4fdd9d488..000000000
--- a/sandbox/aron/schema/collectionObject-ns.xml
+++ /dev/null
@@ -1,86 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-
-<!--
-
-	collectionObject-ns.xml
-
-	A hypothetical, skeletal instance of an CollectionObject payload,
-	represented as an XML document, in a rudimentary root namespace,
-	scoped for the Release 0.1 "Hello World" demo.
-	
-	This is	created for the CollectionSpace system, http://www.collectionspace.org/
-
-  $Author: aron $
-  $Revision: 509 $
-  $Date: 2008-10-27 13:55:56 -0700 (Mon, 27 Oct 2008) $
-
--->
-
-<collectionObject
-	xmlns="http://collectionspace.org/hello">
-
-	<serviceMetadata>
-	
-		<!-- An entirely arbitrary examle -->
-		<collectionSpaceId>org.collectionspace.797220effa5fa160</collectionSpaceId>
-		
-	</serviceMetadata>
-	
-	
-	<!--
-		Data below was taken from the following item in the online catalog
-		of the Museum of the Moving Image in Astoria, NY:
-		
-		http://collection.movingimage.us/index.php?g=detail&object_id=64117
-		
-		The choice of this item was in turn inspired by William Gibson's short story,
-		The Gernsback Continuum:
-		
-		http://www.americanheritage.com/articles/magazine/it/1988/1/1988_1_34.shtml
-	-->
-
-
-	<defaultCollectionObject>
-	
-		<objectNumber>1984.021.0049</objectNumber>
-	
-		<objectName> Radio News, vol. 10, no. 2, August 1928</objectName>
-	
-		<!-- Linebreaks were added to the following description for readability -->
-		<briefDescription>Radio News, August 1928. The cover of this issue features an
-illustration of a man and woman watching an early "radio movie." Text on
-the cover reads, "Radio's Greatest Magazine / Radio News / August 25
-Cents / Over 200 illustrations / Edited by Hugo Gernsback / Radio Movies
-and Television for the Home / Experimenter Publishing Company, 230 Fifth
-Avenue, New York."
-
-In addition to articles about radios and radio technology, the magazine
-also contains several articles about developments in the field of
-television. The issue begins with an editorial about the future of
-television by the magazine's editor, Hugo Gernsback, which is followed
-by an article about the radio movie receiver system invented by C.
-Francis Jenkins. The article includes drawings illustrating the layout
-of the sytem.</briefDescription>
-
-	</defaultCollectionObject>
-	
-
-<!--
-  <sampleMmiCollectionObject>
-  
-  	<artifactClass>Books, literature, and periodicals</artifactClass>
-  	
-  	<format>Magazine</format>
-  	
-  	<material>Paper</material>
-  	
-  	<overallDimensions>
-  		<height>11.75</height>
-  		<width>8.75</width>
-  		<measurementUnit>in</measurementUnit>
-  	</overallDimensions>
-  	
-  </sampleMmiCollectionObject>
--->  
-  
-</collectionObject>
diff --git a/sandbox/aron/schema/collectionObject-ns.xsd b/sandbox/aron/schema/collectionObject-ns.xsd
deleted file mode 100644
index 49c10ee86..000000000
--- a/sandbox/aron/schema/collectionObject-ns.xsd
+++ /dev/null
@@ -1,165 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" targetNamespace="http://collectionspace.org/hello" xmlns:hello="http://collectionspace.org/hello">
-  <xs:element name="collectionObject">
-    <xs:complexType>
-      <xs:sequence>
-        <xs:element ref="hello:serviceMetadata"/>
-        <xs:element ref="hello:defaultCollectionObject"/>
-      </xs:sequence>
-    </xs:complexType>
-  </xs:element>
-  <xs:element name="serviceMetadata">
-    <xs:complexType>
-      <xs:sequence>
-        <xs:element ref="hello:collectionSpaceId"/>
-        <xs:element minOccurs="0" ref="hello:created"/>
-        <xs:element minOccurs="0" ref="hello:createdBy"/>
-        <xs:element minOccurs="0" ref="hello:lastModified"/>
-        <xs:element minOccurs="0" ref="hello:lastModifiedBy"/>
-      </xs:sequence>
-    </xs:complexType>
-  </xs:element>
-  <xs:element name="collectionSpaceId" type="xs:string"/>
-  <xs:element name="created">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:dateTime">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="createdBy">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:string">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="lastModified">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:dateTime">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="lastModifiedBy">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:string">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="defaultCollectionObject">
-    <xs:complexType>
-      <xs:all>
-        <xs:element ref="hello:objectNumber"/>
-        <xs:element minOccurs="0" ref="hello:otherNumber"/>
-        <xs:element minOccurs="0" ref="hello:briefDescription"/>
-        <xs:element minOccurs="0" ref="hello:comments"/>
-        <xs:element minOccurs="0" ref="hello:distinguishingFeatures"/>
-        <xs:element minOccurs="0" ref="hello:objectName"/>
-        <xs:element minOccurs="0" ref="hello:responsibleDepartment"/>
-        <xs:element minOccurs="0" ref="hello:title"/>
-      </xs:all>
-    </xs:complexType>
-  </xs:element>
-  <xs:element name="objectNumber">
-    <xs:simpleType>
-      <xs:restriction base="xs:normalizedString">
-        <xs:minLength value="1"/>
-      </xs:restriction>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="otherNumber">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:string">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="briefDescription">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:string">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="comments">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:string">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="distinguishingFeatures">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:string">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="objectName">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:string">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="responsibleDepartment">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:string">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-  <xs:element name="title">
-    <xs:simpleType>
-      <xs:union memberTypes="xs:string">
-        <xs:simpleType>
-          <xs:restriction base="xs:token">
-            <xs:length value="0"/>
-          </xs:restriction>
-        </xs:simpleType>
-      </xs:union>
-    </xs:simpleType>
-  </xs:element>
-</xs:schema>
diff --git a/sandbox/aron/schema/collectionObject.rng b/sandbox/aron/schema/collectionObject.rng
index 69491cd8c..e1d3c32ed 100644
--- a/sandbox/aron/schema/collectionObject.rng
+++ b/sandbox/aron/schema/collectionObject.rng
@@ -2,9 +2,24 @@
 
 <!--
 
-	collectionObject.rng
+	collectionObject-full-ns.rng
 	
 	A schema defining the structure of an CollectionObject entity.
+		
+	This schema includes all of its components, rather than referring
+	to them via 'externalRef' references. As such, it can be used as the
+	basis for generating a W3C XML Schema (XSD) schema, via
+	James Clark's Trang utility (http://http://www.thaiopensource.com/relaxng/trang.html).
+	(Trang version 20081028 can't resolve such references.) 
+	
+	As a convenience, a 'rng-to-xsd.sh' script file, which trivially wraps Trang
+	to generate XSD from a RELAX NG schema, is provided elsewhere in this distribution.
+	
+	This schema also includes one rudimentary root namespace, scoped for the Release 0.1
+	"Hello World" demo.  We'll need to determine whether, and if so how, we can
+	accommodate multiple namespaces to compose entity objects from various schemas,
+	such as service metadata, and declarations for the default entity, a domain- or community-
+	provided entity, and site- or instance-specific version of an entity.
 
 	This schema was created for the CollectionSpace system,
 	http://www.collectionspace.org/
@@ -12,25 +27,225 @@
 	It is written in the XML syntax of the RELAX NG schema language,
 	http://relaxng.org/
 	
-  $Author$
-  $Revision$
-  $Date$
+  $Author: aron $
+  $Revision: 57 $
+  $Date: 2009-03-05 16:06:06 -0800 (Thu, 05 Mar 2009) $
 
 -->
 
 <element
-	name="collectionObject" 
-	xmlns="http://relaxng.org/ns/structure/1.0">
+	name="collectionObject"
+	ns="http://collectionspace.org/hello"
+	xmlns="http://relaxng.org/ns/structure/1.0"
+	datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
+	
+	
+	<!-- ######################################################################## -->
+	<!-- Service Metadata                                                         -->
+	<!-- ######################################################################## -->
 	
-	<!-- Data elements common to every entity object in the CollectionSpace system. -->
-	<externalRef href="serviceMetadata.rng"/>
+	<!--
+		Data elements common to every entity object in the CollectionSpace system.
+		
+		This is an quickly conceived-of list for the Release 0.1 "Hello World" demo,
+		and is not intended to be definitive going forward; further definition
+		will be required.
+	-->
 	
+	<element
+		name="serviceMetadata">
+		
+		<!--
+			A unique CollectionSpace system identifier (ID) for this
+			entity record.  This is distinguished from any museum-created
+			or other identifiers that might also be associated with it.
+				
+			Note: We may wish to think further about what this element name should be.
+		-->
+		<element name="collectionSpaceId">
+			<!--
+				Note: We may potentially wish to specify a regex-type pattern
+				here for further validating these IDs.
+			-->
+			<data type="string" />
+		</element>
+		
+		<!--
+			All of the data elements after this point are fully optional.
+			
+			It's possible we may never want or need to pass these in
+			routine message payloads, and if so, this merely constitutes
+			notes/documentation on a few representative types of data that
+			we might additionally store as system metadata, beyond an identifier.
+			
+			It's also possible that we might offer a service to provide this
+			system metadata for any object, so that, for instance, a client
+			might be able to retrieve the full modification history for an object.
+			This *may* even already be envisioned for an already defined or
+			candidate service ...
+		-->
+		
+			<!--
+				A timestamp for the creation of this entity record, as specified in
+				http://www.w3.org/TR/xmlschema-2/#dateTime
+			-->
+			<optional>
+				<element name="created">
+					<choice>
+						<data type="dateTime" />
+						<empty />
+					</choice>
+				</element>
+			</optional>
+		
+			<!-- The system Principal that created this entity record -->
+			<optional>
+				<element name="createdBy">
+					<choice>
+						<data type="string" />
+						<empty />
+					</choice>
+				</element>
+			</optional>
+	
+			<!-- 
+				Note: Do we also need 'acting as designate for' information here,
+				for cases where one system Principal created this entity while
+				acting as a designate for another Principal?
+			-->
+		
+			<!--
+				A timestamp for the last modification of this entity record, as specified in
+				http://www.w3.org/TR/xmlschema-2/#dateTime
+			-->
+			<optional>
+				<element name="lastModified">
+					<choice>
+						<data type="dateTime" />
+						<empty />
+					</choice>
+				</element>
+			</optional>
+		
+			<!-- The system Principal that created this entity record -->
+			<optional>
+				<element name="lastModifiedBy">
+					<choice>
+						<data type="string" />
+						<empty />
+					</choice>
+				</element>
+			</optional>
+	
+			<!-- 
+				Note: Do we also need 'acting as designate for' information here,
+				for cases where one system Principal modified this entity while
+				acting as a designate for another Principal?
+			-->
+			
+			<!--
+				Patrick mentioned the concept of 'valid to/from' timestamps.
+				If this applied to entity objects, not to schema, we might
+				explore that further as another possible type of system metadata. 
+			-->
+			
+	</element>
+
+
+	<!-- ######################################################################## -->
+	<!-- Default CollectionObject                                                 -->
+	<!-- ######################################################################## -->
+
 	<!-- The default CollectionSpace schema for an entity object (extremely simplified). -->
-	<externalRef href="defaultCollectionObject.rng"/>
+
+	<element
+		name="defaultCollectionObject">
+		
+		<!--
+			The following data elements are taken from the Basic section,
+			Object ID Information sub-section, of the Object Data Entry wireframe
+			
+			See:
+			
+			http://wiki.collectionspace.org/display/collectionspace/Wireframes+-+Object+Data+Entry
+			and
+			http://wiki.collectionspace.org/display/collectionspace/Hello+World+(Release+0.1)+Functionality+Requirements
+			
+		-->
+	
+		<!-- Allows child elements to appear in any order -->
+		<interleave>
+		
+			<element name="objectNumber">
+				<!--
+					This declaration specifies that the value of this element must never be empty (blank).
+					If that's not accurate, it should be redefined, perhaps to match other elements below.
+					
+					Note: In a site- or instance-specific declaration - not in the default
+					definition here - we might wish to specify a regex-type pattern here for
+					further constraining valid object numbers.
+				-->
+				<data type="normalizedString">
+					<param name="minLength">1</param>
+				</data>
+			</element>
+	
+			<element name="otherNumber">
+				<choice>
+					<data type="string" />
+					<empty />
+				</choice>
+			</element>
+		
+			<element name="briefDescription">
+				<choice>
+					<data type="string" />
+					<empty />
+				</choice>
+			</element>
+		
+			<element name="comments">
+				<choice>
+					<data type="string" />
+					<empty />
+				</choice>
+			</element>
+		
+			<element name="distinguishingFeatures">
+				<choice>
+					<data type="string" />
+					<empty />
+				</choice>
+			</element>
+		
+			<element name="objectName">
+				<choice>
+					<data type="string" />
+					<empty />
+				</choice>
+			</element>
+		
+			<element name="responsibleDepartment">
+				<choice>
+					<data type="string" />
+					<empty />
+				</choice>
+			</element>
+		
+			<element name="title">
+				<choice>
+					<data type="string" />
+					<empty />
+				</choice>
+			</element>
+	
+		</interleave>
+				
+	</element>	
+
+	<!-- A domain- or community-provided schema, if available, would go here -->
 	
-	<!-- A reference to a domain- or community-provided schema, if available, would go here -->
+	<!-- An site- or instance-provided schema, if available, would go here. -->
 	
-	<!-- An example of a site- or instance-provided schema (extremely simplified). -->
-	<externalRef href="sampleMmiCollectionObject.rng"/>
     
 </element>
diff --git a/sandbox/aron/schema/collectionObject.xml b/sandbox/aron/schema/collectionObject.xml
index 97615c0c0..4fdd9d488 100644
--- a/sandbox/aron/schema/collectionObject.xml
+++ b/sandbox/aron/schema/collectionObject.xml
@@ -2,10 +2,11 @@
 
 <!--
 
-	collectionObject.xml
+	collectionObject-ns.xml
 
 	A hypothetical, skeletal instance of an CollectionObject payload,
-	represented as an XML document.
+	represented as an XML document, in a rudimentary root namespace,
+	scoped for the Release 0.1 "Hello World" demo.
 	
 	This is	created for the CollectionSpace system, http://www.collectionspace.org/
 
@@ -15,7 +16,8 @@
 
 -->
 
-<collectionObject>
+<collectionObject
+	xmlns="http://collectionspace.org/hello">
 
 	<serviceMetadata>
 	
@@ -27,11 +29,14 @@
 	
 	<!--
 		Data below was taken from the following item in the online catalog
-		of the Museum of the Moving Image in Astoria, NY.
+		of the Museum of the Moving Image in Astoria, NY:
 		
 		http://collection.movingimage.us/index.php?g=detail&object_id=64117
 		
-		and in turn by William Gibson's short story, The Gernsback Continuum.
+		The choice of this item was in turn inspired by William Gibson's short story,
+		The Gernsback Continuum:
+		
+		http://www.americanheritage.com/articles/magazine/it/1988/1/1988_1_34.shtml
 	-->
 
 
@@ -60,6 +65,7 @@ of the sytem.</briefDescription>
 	</defaultCollectionObject>
 	
 
+<!--
   <sampleMmiCollectionObject>
   
   	<artifactClass>Books, literature, and periodicals</artifactClass>
@@ -75,6 +81,6 @@ of the sytem.</briefDescription>
   	</overallDimensions>
   	
   </sampleMmiCollectionObject>
-  
+-->  
   
 </collectionObject>
diff --git a/sandbox/aron/schema/collectionObject.xsd b/sandbox/aron/schema/collectionObject.xsd
index 1d8bbe89b..cc8d30e17 100644
--- a/sandbox/aron/schema/collectionObject.xsd
+++ b/sandbox/aron/schema/collectionObject.xsd
@@ -1,21 +1,21 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" targetNamespace="http://collectionspace.org/hello" xmlns:hello="http://collectionspace.org/hello">
   <xs:element name="collectionObject">
     <xs:complexType>
       <xs:sequence>
-        <xs:element ref="serviceMetadata"/>
-        <xs:element ref="defaultCollectionObject"/>
+        <xs:element ref="hello:serviceMetadata"/>
+        <xs:element ref="hello:defaultCollectionObject"/>
       </xs:sequence>
     </xs:complexType>
   </xs:element>
   <xs:element name="serviceMetadata">
     <xs:complexType>
       <xs:sequence>
-        <xs:element ref="collectionSpaceId"/>
-        <xs:element minOccurs="0" ref="created"/>
-        <xs:element minOccurs="0" ref="createdBy"/>
-        <xs:element minOccurs="0" ref="lastModified"/>
-        <xs:element minOccurs="0" ref="lastModifiedBy"/>
+        <xs:element ref="hello:collectionSpaceId"/>
+        <xs:element ref="hello:created"/>
+        <xs:element ref="hello:createdBy"/>
+        <xs:element ref="hello:lastModified"/>
+        <xs:element ref="hello:lastModifiedBy"/>
       </xs:sequence>
     </xs:complexType>
   </xs:element>
@@ -67,14 +67,14 @@
   <xs:element name="defaultCollectionObject">
     <xs:complexType>
       <xs:all>
-        <xs:element ref="objectNumber"/>
-        <xs:element minOccurs="0" ref="otherNumber"/>
-        <xs:element minOccurs="0" ref="briefDescription"/>
-        <xs:element minOccurs="0" ref="comments"/>
-        <xs:element minOccurs="0" ref="distinguishingFeatures"/>
-        <xs:element minOccurs="0" ref="objectName"/>
-        <xs:element minOccurs="0" ref="responsibleDepartment"/>
-        <xs:element minOccurs="0" ref="title"/>
+        <xs:element ref="hello:objectNumber"/>
+        <xs:element minOccurs="0" ref="hello:otherNumber"/>
+        <xs:element minOccurs="0" ref="hello:briefDescription"/>
+        <xs:element minOccurs="0" ref="hello:comments"/>
+        <xs:element minOccurs="0" ref="hello:distinguishingFeatures"/>
+        <xs:element minOccurs="0" ref="hello:objectName"/>
+        <xs:element minOccurs="0" ref="hello:responsibleDepartment"/>
+        <xs:element minOccurs="0" ref="hello:title"/>
       </xs:all>
     </xs:complexType>
   </xs:element>
diff --git a/sandbox/aron/schema/collectionObjects.rng b/sandbox/aron/schema/collectionObjects.rng
index 4e84991b8..d0116e585 100644
--- a/sandbox/aron/schema/collectionObjects.rng
+++ b/sandbox/aron/schema/collectionObjects.rng
@@ -35,8 +35,9 @@
 	datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
 
 	<!--
-		Sanjay's used a different naming convention in the Person prototype,
-		which would be equivalent here to "collection-object-list-item".
+		Sanjay has used a different naming convention in the Person prototype,
+		which would be equivalent here to "collection-object-list-item", rather than
+		to "collectionObjectListItem", as used below.
 		
 		We may want to standardize on use of CamelCase or hyphenated lowercase throughout, or
 		else establish a convention for list items which is distinct from that convention.
diff --git a/sandbox/aron/schema/defaultCollectionObject.rng b/sandbox/aron/schema/defaultCollectionObject.rng
deleted file mode 100644
index 368279864..000000000
--- a/sandbox/aron/schema/defaultCollectionObject.rng
+++ /dev/null
@@ -1,120 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-
-<!--
-
-	defaultCollectionObject.rng
-	
-	A schema defining the structure of an default, "out of the box" CollectionObject.
-
-	This schema was created for the CollectionSpace system,
-	http://www.collectionspace.org/
-	
-	It is written in the XML syntax of the RELAX NG schema language,
-	http://relaxng.org/
-
-  $Author$
-  $Revision$
-  $Date$
-
--->
-
-<element
-	name="defaultCollectionObject" 
-	xmlns="http://relaxng.org/ns/structure/1.0"
-	datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
-	
-	<!--
-		The following data elements are taken from the Basic section,
-		Object ID Information sub-section, of the Object Data Entry wireframe
-		
-		See:
-		
-		http://wiki.collectionspace.org/display/collectionspace/Wireframes+-+Object+Data+Entry
-		and
-		http://wiki.collectionspace.org/display/collectionspace/Hello+World+(Release+0.1)+Functionality+Requirements
-		
-	-->
-
-	<!-- Allows child elements to appear in any order -->
-  <interleave>
-  
-		<element name="objectNumber">
-			<!--
-				This declaration specifies that the value of this element must never be empty (blank).
-				If that's not accurate, it should be redefined, perhaps to match other elements below.
-				
-				Note: In a site- or instance-specific declaration - not in the default
-				definition here - we might wish to specify a regex-type pattern here for
-				further constraining valid object numbers.
-			-->
-			<data type="normalizedString">
-				<param name="minLength">1</param>
-			</data>
-		</element>
-
-		<optional>
-			<element name="otherNumber">
-				<choice>
-					<data type="string" />
-					<empty />
-				</choice>
-			</element>
-		</optional>
-		
-		<optional>
-			<element name="briefDescription">
-				<choice>
-					<data type="string" />
-					<empty />
-				</choice>
-			</element>
-		</optional>
-		
-		<optional>
-			<element name="comments">
-				<choice>
-					<data type="string" />
-					<empty />
-				</choice>
-			</element>
-		</optional>
-		
-		<optional>
-			<element name="distinguishingFeatures">
-				<choice>
-					<data type="string" />
-					<empty />
-				</choice>
-			</element>
-		</optional>
-		
-		<optional>
-			<element name="objectName">
-				<choice>
-					<data type="string" />
-					<empty />
-				</choice>
-			</element>
-		</optional>
-		
-		<optional>
-			<element name="responsibleDepartment">
-				<choice>
-					<data type="string" />
-					<empty />
-				</choice>
-			</element>
-		</optional>
-		
-		<optional>
-			<element name="title">
-				<choice>
-					<data type="string" />
-					<empty />
-				</choice>
-			</element>
-		</optional>
-
-	</interleave>
-	    
-</element>
diff --git a/sandbox/aron/schema/rng-to-xsd.sh b/sandbox/aron/schema/rng-to-xsd.sh
index 053b369bc..1d71264d7 100644
--- a/sandbox/aron/schema/rng-to-xsd.sh
+++ b/sandbox/aron/schema/rng-to-xsd.sh
@@ -5,6 +5,10 @@
 # Simple bash shell script to generate a W3C XML Schema (XSD) document
 # from a RELAX NG schema document.
 #
+# Uses James Clark's Trang utility, http://www.thaiopensource.com/relaxng/trang.html
+#
+# Assumes Trang's 'trang.jar' file is located in a 'tools' subdirectory of the current directory.
+#
 # Requires two arguments:
 # - Filename of the RELAX NG schema document.
 #   (Or the full path to this document, if it is not in the current directory.)
diff --git a/sandbox/aron/schema/sampleMmiCollectionObject.rng b/sandbox/aron/schema/sampleMmiCollectionObject.rng
deleted file mode 100644
index 383054185..000000000
--- a/sandbox/aron/schema/sampleMmiCollectionObject.rng
+++ /dev/null
@@ -1,102 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-
-<!--
-
-	sampleMmiCollectionObject.rng
-	
-	A schema defining the structure of a completely hypothetical CollectionObject
-	for the Museum of the Moving Image (MMI) in Astoria, New York.
-	
-	This is a minimal example created for an early system demo, and represents
-	what a site- or instance-specific entity definition might look like. 
-
-	This schema was created for the CollectionSpace system,
-	http://www.collectionspace.org/
-	
-	It is written in the XML syntax of the RELAX NG schema language,
-	http://relaxng.org/
-
-  $Author$
-  $Revision$
-  $Date$
-
--->
-
-<element
-	name="sampleMmiCollectionObject" 
-	xmlns="http://relaxng.org/ns/structure/1.0"
-	datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
-	
-	<!--
-		These initial choices for a small subset of site- or instance-specific
-		data elements were inspired by the following item in themuseum's online catalog:
-		
-		http://collection.movingimage.us/index.php?g=detail&object_id=64117
-		
-		and in turn by William Gibson's short story, The Gernsback Continuum.
-	-->
-
-	<!-- Allows child elements to appear in any order -->
-  <interleave>
-
-		<optional>
-			<element name="artifactClass">
-				<choice>
-					<data type="string" />
-					<empty />
-				</choice>
-			</element>
-		</optional>
-	
-		<optional>
-			<element name="format">
-				<choice>
-					<data type="string" />
-					<empty />
-				</choice>
-			</element>
-		</optional>
-	
-		<optional>
-			<element name="material">
-				<choice>
-					<data type="string" />
-					<empty />
-				</choice>
-			</element>
-		</optional>
-			
-		<!--
-			The following was constructed somewhat awkwardly, because I
-			don't know how yet to make the value of an attribute dependent on
-			the value of its corresponding element, as in the case where "if the
-			value of the 'height' element is non-empty, then the value of its
-			corresponding 'measurementUnit' attribute must also be non-empty." - Aron.
-		-->
-		<optional>
-			<element name="overallDimensions">
-				<element name="height">
-					<choice>
-						<data type="decimal" />
-						<empty />
-					</choice>
-				</element>
-				<element name="width">
-					<choice>
-						<data type="decimal" />
-						<empty />
-					</choice>
-				</element>
-				<element name="measurementUnit">
-					<choice>
-						<value>in</value>
-						<value>mm</value>
-						<empty />
-					</choice>
-				</element>
-			</element>
-		</optional>
- 	
- 	</interleave>
-	    
-</element>
diff --git a/sandbox/aron/schema/serviceMetadata.rng b/sandbox/aron/schema/serviceMetadata.rng
deleted file mode 100644
index b6f1ae85d..000000000
--- a/sandbox/aron/schema/serviceMetadata.rng
+++ /dev/null
@@ -1,133 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-
-<!--
-
-	serviceMetadata.rng
-	
-	A schema defining the structure of service metadata:
-	data elements that are associated with every entity object.
-
-	This schema was created for the CollectionSpace system,
-	http://www.collectionspace.org/
-	
-	It is written in the XML syntax of the RELAX NG schema language,
-	http://relaxng.org/
-
-  $Author$
-  $Revision$
-  $Date$
-
--->
-
-<element
-	name="serviceMetadata" 
-	xmlns="http://relaxng.org/ns/structure/1.0"
-	datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
-	
-	<!--
-		A unique CollectionSpace system identifier (ID) for this
-		entity record.  This is distinguished from any museum-created
-		or other identifiers that might also be associated with it.
-			
-		Note: We may wish to think further about what this element name should be.
-	-->
-	<element name="collectionSpaceId">
-		<!--
-			Note: We may potentially wish to specify a regex-type pattern
-			here for further validating these IDs.
-		-->
-		<data type="string" />
-	</element>
-	
-	<!--
-		All of the data elements after this point are fully optional.
-		
-		It's possible we may never want or need to pass these in
-		routine message payloads, and if so, this merely constitutes
-		notes/documentation on a few representative types of data that
-		we might additionally store as system metadata, beyond an identifier.
-		
-		It's also possible that we might offer a service to provide this
-		system metadata for any object, so that, for instance, a client
-		might be able to retrieve the full modification history for an object.
-		This *may* even already be envisioned for an already defined or
-		candidate service ...
-	-->
-	
-		<!-- ######################### -->
-		<!-- Creation                  -->
-		<!-- ######################### -->
-	
-		<!--
-			A timestamp for the creation of this entity record, as specified in
-			http://www.w3.org/TR/xmlschema-2/#dateTime
-		-->
-		<optional>
-			<element name="created">
-				<choice>
-					<data type="dateTime" />
-					<empty />
-				</choice>
-			</element>
-		</optional>
-	
-		<!-- The system Principal that created this entity record -->
-		<optional>
-			<element name="createdBy">
-				<choice>
-					<data type="string" />
-					<empty />
-				</choice>
-			</element>
-		</optional>
-
-		<!-- 
-			Note: Do we also need 'acting as designate for' information here,
-			for cases where one system Principal created this entity while
-			acting as a designate for another Principal?
-		-->
-	
-		<!-- ######################### -->
-		<!-- Last modification         -->
-		<!-- ######################### -->
-		
-		<!--
-			A timestamp for the last modification of this entity record, as specified in
-			http://www.w3.org/TR/xmlschema-2/#dateTime
-		-->
-		<optional>
-			<element name="lastModified">
-				<choice>
-					<data type="dateTime" />
-					<empty />
-				</choice>
-			</element>
-		</optional>
-	
-		<!-- The system Principal that created this entity record -->
-		<optional>
-			<element name="lastModifiedBy">
-				<choice>
-					<data type="string" />
-					<empty />
-				</choice>
-			</element>
-		</optional>
-
-		<!-- 
-			Note: Do we also need 'acting as designate for' information here,
-			for cases where one system Principal modified this entity while
-			acting as a designate for another Principal?
-		-->
-
-		<!-- ######################### -->
-		<!-- Valid from/to             -->
-		<!-- ######################### -->
-		
-		<!--
-			Patrick mentioned the concept of 'valid to/from' timestamps.
-			If this applied to entity objects, not to schema, we might
-			explore that further as another possible type of system metadata. 
-		-->
-    
-</element>
diff --git a/sandbox/aron/schema/validate-rng.sh b/sandbox/aron/schema/validate-rng.sh
index 5cc51a9bf..517b9d62c 100644
--- a/sandbox/aron/schema/validate-rng.sh
+++ b/sandbox/aron/schema/validate-rng.sh
@@ -3,6 +3,10 @@
 # Simple bash shell script to validate an XML instance document
 # against a RELAX NG schema.
 #
+# Uses James Clark's Jing utility, http://www.thaiopensource.com/relaxng/jing.html
+#
+# Assumes Jing's 'jing.jar' file is located in a 'tools' subdirectory of the current directory.
+#
 # Requires two arguments:
 # - Filename of the RELAX NG schema document.
 #   (Or the full path to this document, if it is not in the current directory.)
diff --git a/sandbox/aron/schema/validate-xsd.sh b/sandbox/aron/schema/validate-xsd.sh
new file mode 100644
index 000000000..3e9da9dc4
--- /dev/null
+++ b/sandbox/aron/schema/validate-xsd.sh
@@ -0,0 +1,23 @@
+#!/bin/sh
+#
+# Simple bash shell script to validate an XML instance document
+# against a W3C XML Schema.
+#
+# Uses the XMLStarlet utility, http://xmlstar.sourceforge.net/
+#
+# Assumes the 'xmlstarlet' executable is located within the shell's executable path.
+#
+# Note that XMLStarlet's support for XML Schema is "not yet fully supported", due to
+# incomplete support in a dependency, the XML C toolkit for Gnome (http://xmlsoft.org/).
+#
+# Requires two arguments:
+# - Filename of the W3C XML Schema document.
+#   (Or the full path to this document, if it is not in the current directory.)
+# - Filename of the XML instance document.
+#   (Or the full path to this document, if it is not in the current directory.)
+#
+# $Author: aron $
+# $Revision: 57 $
+# $Date: 2009-03-05 16:06:06 -0800 (Thu, 05 Mar 2009) $
+
+xmlstarlet val --err --xsd $1 $2
\ No newline at end of file
-- 
2.47.3