Deprecate isBuiltIn().
Update cache when value type updated.
Simplify handling of built-in properties.
Hide details of database object id.
Fix typos.
Bug fix
Simplify updating of value type.
Simplify updating of schema.
Fix typo.
Fix issue in schema update policy implementation.
Edit javadoc comments.
Refactor SchemaComponent, AttributeDefinition, and SeriesDefinition: pull up isErasing() and deprecate consolidate().
Edit javadoc comments.
Value null now assignment compatible by default.
Simplify schema updating and fix validation issues.
Bug fix.
Eliminate obsolete error messages.
Rename three DatabaseBackend methods findChronicles to findChronicle.
Pull up some diagnostic messages from the low level library.
Eliminate testing support methods.