v3.0 Changes

Summary of changes for version 3.0

• Anonymous types changed to named types (to allow use of xsd:redefine mechanism)
• Version added to xsd:schema.
• SCHEMAVERSION attribute added to element.
• documentIdentifier element added to element (+ documentIdentifierLocation attribute)
• Changed schema version to 3.0
• Changed namespace and targetNamespace to http://www.loc.gov/standards/alto/ns-v3#

ALTO schemas will be updated by whole numbers upon making changes that break backward compatibility (version 1 to version 2), and decimals for changes that will not (2.0 to 2.1). The namespace itself will also only change on major versions (ns-v2 to ns-v3).