Edition 3 Metadata registry (MDR) Ray Gates May 12, /05/20151

Agenda MDR Approach Changes in Edition 3 – UML packages and Conformance – Changes to types of Metadata Items – Changes to Identification region – Changes to Designation & Definition region – Changes to Administration/Registration region New in Edition 3 – Concept Systems 14/05/20152

MDR Approach Specification of a metamodel for registering metadata Common facilities apply to all metadata types – Identification, Designation & Definition, Registration Description of specific types of metadata – Data Description – Data Elements and Data Element Concepts, Conceptual and Value Domains – Concept Systems (new in Edition 3) and Classification Schemes 14/05/20153

UML PACKAGES & CONFORMANCE 14/05/20154

Use of UML Packages in MDR Edition 2 divided the metamodel into regions for descriptive purposes only Edition 3 uses UML packages to represent regions of the metamodel – Shows dependencies between regions more clearly – Enables finer-grained conformance criteria to be specified 14/05/20155

MDR package dependencies 14/05/20156

Conformance levels Conformance may be claimed for a set of data structures and/or datatypes for clauses: – clause 7 Identification, Designation and Definition – clause 9 Concepts – clause 10 Binary Relations – clause 11 Data Description. Conformance may be claimed for a registry or for a registry software system for clauses: – clause 8 Registration – clause 12 Basic attributes. 14/05/20157

TYPES OF METADATA ITEMS 14/05/20158

Types of metadata items Finer-grained typing of metadata In Edition 2, every metadata item had to be recorded as an Administered Item – all items subclassed from Administered_Item Edition 3 is more light-weight and supports selective typing – when recording an item in a registry, apply the desired typing, which can be changed over time 14/05/20159

Edition 2 Administered Items In Edition 2, all specified metadata objects are Explicitly subclassed from Administered_Item. 14/05/201510

Edition 3 types of metadata items Registered_Item is an abstract class. Only it’s subclasses can be instantiated. In Edition 3, the specified types are available to be applied to any metadata item, as desired. 14/05/201511

CHANGES TO IDENTIFICATION REGION 14/05/201512

Single vs. Multiple Identifiers Edition 2 allowed only a single identifier per metadata item Edition 3 allows multiple identifiers per metadata item, and requires an associated namespace be specified for each identifier Supporting multiple identifiers allows metadata items to be shared across registries that use different identification schemes Edition 3 simplifies the structure of the identifier and supplements it with a Namespace 14/05/201513

Identification in Edition 2 14/05/201514

Identification in Edition 3 14/05/201515

CHANGES TO DESIGNATION & DEFINITION REGION 14/05/201516

New for Designations and Definitions Edition 2 allowed one Designation and one Definition to be specified as ‘preferred’ Edition 3 supports different Acceptability ratings to be specified in different contexts – preferred – admitted – deprecated – obsolete – superseded Edition 3 supports recording Naming Conventions Edition 3 renames ‘name’ to ‘sign’ 14/05/201517

Edition 2 Designation & Definition 14/05/201518

Edition 3 Designation & Definition 14/05/201519

CHANGES TO REGISTRATION REGION 14/05/201520

Edition 2 Administration region 14/05/201521

Edition 3 Registration region Should we associate Submission_Record with Identified_Item instead of Registered_Item? 14/05/201522

CONCEPT SYSTEMS 14/05/201523

Concept Systems overview (1) Support for Concept Systems – using simple relations and/or complex assertions – with examples using Simple Knowledge Organization System (SKOS) Object Role Modelling (ORM) Web Ontology Language (OWL) Common Logic Interchange Format (CLIF) 14/05/201524

Concept Systems overview (2) Concept System subsumes – Classification Scheme – Representation Class All Concepts must have source Concept System, but it may simply the Registry Concept systems can reference or import other concept systems 14/05/201525

Edition 3 Concept System 14/05/201526