Title: WG2%20Tutorial%20ISO/JTC1/SC32
1WG2 TutorialISO/JTC1/SC32
Larry Fitzwater (202) 260-3071 fitzwater.larry_at_epa
.gov
SDC-0002-021-JE-4029
2WG 2 Areas of Focus
- Metadata Registries.
- IT Enablement.
- Metamodel Framework.
- Conceptual Graphs and Knowledge Interchange
Format.
3Topics to be Covered
- Registries A common interest of SC 32 WGs.
- Registry types.
- Functionality and content issues.
- Registry content examples.
- Metadata management issues.
- A proposed solutionRegistry interoperation.
- Registry standards efforts.
- Conference 2003Demonstrate interoperability.
- Standards, software, practice.
4Registries
- Using this term loosely, there are several types
of registries in the area of data management and
interchange. - The registries have some common, overlapping
content, which is extended and utilized in
different ways. - The registries vary according to the intended
purpose, granularity of contents, the level of
semantics management.
5Types of Registries
6Types of Registries
- OASIS/ebXML (Organization for the Advancement of
Structured Information Standards/electronic
business XML) XML Registries XML Artifacts. - Register XML Artifacts - Includes schemas and
DTDs. XML schema relate to a paper form, EDI
document, or reporting requirement. - Emphasis on syntactic (structure) information.
- ISO 11179 Metadata Registries Data semantics.
- Register Data Elements, components of data
elements and groups of data elements. For
example, country codes for customer place of
residence. Includes data element concepts,
data elements (including representation), value
domains, and (multiple) taxonomies. - Emphasis on semantic information such as
definitions of data elements and value meanings,
and stewardship responsibilities. - UDDI (Universal Description, Discovery, and
Integration) Registries Web-based business
services. - A White page directory of the business activities
of firms. - Emphasis on interface specifications.
7Types of Registries(continued)
- Database System Registries (System Catalogs/Data
Dictionaries/ Repositories) Schema, integrity
operational information. - Includes all elements of database schemas data
elements, relations, integrity constraints. - Emphasis on information required to make database
systems work for queries, etc., not on semantic
management. - Case Tool Registries (Encyclopedias/Repositories)
Data model and application program logic. - Includes information needed to create a database
and potentially the program code for a system.
Contains database schemas. - Emphasis not on semantic management.
- Ontological Registries Concept structures.
- Includes relations among concepts (subsumption,
inheritance,) and axioms for inference among
concepts, e.g., temporal/spatial reasoning, etc. - Emphasis is on semantics.
8Types of Registries(continued)
- Software Component Registries Software
components. - Reuse software components built on specific
vendor platforms such as EJB (Enterprise Java
Beans), COM, and CORBA IDL(Common Object Request
Broker Architecture Interface Definition
Language), etc. - Include basic common elementary objects and
object patterns. - Emphasis on reusability of software component to
build flexible and standardized business
systems.
9RegistriesExample of Common Content
Database Catalogs
Common Content
ISO 11179Registries
UDDIRegistries
Common Content
Common Content
Country Name
OASIS/ebXMLRegistries
CASE Tool Repositories
Common Content
Common Content
OntologicalRegistries
Software Component Registries
Common Content
Common Content
10Registries Management of Common Content
- Overlapping content presents the usual multiple
entry, synchronization, and maintenance problems
for users. - Data management must also accommodate differences
in data representation.
11Example of Common ContentCountry Identifier
Data Elements
DZ BE CN DK EG FR . . . ZW
012 056 156 208 818 250 . . . 716
Algeria Belgium China Denmark Egypt France . .
. Zimbabwe
LAlgérie Belgique Chine Danemark Egypte La
France . . . Zimbabwe
DZA BEL CHN DNK EGY FRA . . . ZWE
Name Context Definition Unique ID 4572 Value
Domain Maintenance Org. Steward Classification
Registration Authority Others
ISO 3166 English Name
ISO 3166 3-Numeric Code
ISO 3166 2-Alpha Code
ISO 3166 French Name
ISO 3166 3-Alpha Code
12ISO 11179 Registry
lt?xml version"1.0"?gt ltshipTo
gt ltnamegtAlice Wilsonlt/namegt
ltstreetgt161 North
Streetlt/streetgt ltcitygtHappy
Valleylt/citygt
ltstategtMOlt/stategt
ltzipgt63105lt/zipgt ltcountry
codegtUSAlt/country codegt
lt/shipTogt
13OASIS/ebXML XML Registry
lt?xml version"1.0"?gt ltshipTo
gt ltnamegtAlice Wilsonlt/namegt
ltstreetgt161 North
Streetlt/streetgt ltcitygtHappy
Valleylt/citygt
ltstategtMOlt/stategt
ltzipgt63105lt/zipgt ltcountry
codegtUSAlt/country codegt
lt/shipTogt
REPOSITORY
VI304
Dollars
X12
Unit Price
EDIFACT
List Price
Collaboration Partner 1
Collaboration Partner 2
Currency
ltRep href http//www.disa.milgtDISAlt/Repgt
ltELEMENT rep DISA nameCountry Biz
VI304 gt
Schema or Template
Schema or Template
ltRep href http//www.disa.milgtDISAlt/Repgt
ltELEMENT rep DISA nameCntryCode Biz
VI304 gt
XML Instance
XML Instance
ltCountrygtJPNlt/Countrygt
ltCntryCodegtJPNlt/CntryCodegt
14UDDI Registry
lt?xml version"1.0"?gt ltshipTogt
ltnamegtAlice Wilsonlt/namegt
ltstreetgt161 North
Streetlt/streetgt ltcitygtHappy
Valleylt/citygt
ltstategtMOlt/stategt
ltzipgt63105lt/zipgt ltcountry
codegtUSAlt/country codegt
lt/shipTogt
Business-to-Business
15Case Tool Repository
16Database Catalog
17Ontological Registry
18 An Example of Software Component Registry
19Needs for Registry Interoperation
ebXML Registry
Business Category
EAN Registry
RosettaNet Registry
GCI Registry
CPFR Registry
Component Registry
Business Negotiation
UDDI
Consumer Profile
Vendor Catalog
Shipper Catalog
System Development
Production Planning
CALS
Customer Support
PDES/STEP Registry
Shipping
Manufacturing
20Consolidation or Interoperation?
- Does one registry acquire all of the key
functionalities? - Do distinct capabilities require multiple
registries with interoperability?
21Consolidation or Interoperation? (continued)
22Consolidation or Interoperation? (continued)
23Consolidation or Interoperation? (continued)
24Consolidation or Interoperation? (continued)
25Interoperation of Registries
Interoperation
26A Look at theDevelopment Efforts
- How can we work toward interoperability?
- Standards developers.
- Software developers.
- Practitioners.
27XML Registry Efforts
- OASIS Registry/Repository Specification.
- OASIS and ebXML have merged into a single OASIS
Technical Committee chaired by NIST. - OASIS specifications strength is in its
classification capabilities. Associations among
objects make it easy to compare versions of
similar objects. - OASIS allows organizations to register, classify,
capture associations and dependencies, and record
additional metadata for their objects of choice. - XML interface provides easy access. Members can
exchange information with one another. - Major advantage is that the interface can remain
stable for each interchange partner.
28XML Registry Efforts (continued)
- OASIS Registry/Repository Specification
(continued). - Registered objects associated with two pieces of
information - An electronic file consisting of a specific
digital instance. The file containing the
registered object is maintained by a repository. - Metadata for naming, describing, and locating the
registered object and identifying its
associations and relationships with other
objects. The metadata is maintained by the
registry. - Registry and repository are tied together in that
the metadata includes a globally unique locator
for a file. - Benefits of storing metadata in a registry
include reuse of data and metadata, efficient
version control, unified understanding of
registered objects, and promotion of consistency
across organizational areas. - May be a driving force in commercial
implementations that are interoperable between
trading partners and meet government needs.
29Speaking the Same Language
Company X publishes an XML Schema in a public
repository.
Company Z retrieves XML Schema from repository
and generates XML document from it.
Company Z sends XML document to Company X over
shared communications link.
Company X verifies correctness of received XML
document by checking it against well-known Schema.
XML Schema provides cross-organizational XML
document interoperability.
30Metadata Registry Efforts
- ISO/IEC 11179 Metadata Registries Background.
- Specifies basic aspects of the kind and quality
of metadata necessary to describe data and the
management and administration of that metadata in
a metadata registry. - Applies to the formulation of data
representations, meanings, and relationships
between them to be shared, independent of the
organization that produces the data. - Focuses on semantics (the meaning of data) and
management of semantic change. - Does not apply to the physical representation of
data as bits and bytes metadata refers to
descriptions of other data.
31Metadata Registry Efforts (continued)
- Major aspects of ISO/IEC 11179 family of
international standards apply to activities
including - The definition, specification and contents of
data element dictionaries or data registries,
including interchanging or referencing among
various collections of data elements. - The design and specification of
application-oriented data models, databases, and
message types for data interchange. - The actual use of data in communications and
information processing systems. - Interchanging or referencing among various
collections of data elements. - Major implementations for ISO/IEC exist for
environment, healthcare, intelligent
transportation system, aviation, demographic and
other programmatic areas. - The desire is to make these metadata registries
interoperate with XML registries and with the
11179 registries handling deeper levels of
semantic management.
32country
SDC-0002-021-JE-4029
33SDC-0002-021-JE-4029
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35Business Registry Efforts
- UDDI effort defines a set of specifications
making business accelerate use of B2B and
commerce over the Internet easier. - This direct application-to-application
integration is a core building block of the
digital economy and will help reduce many of the
configuration and compatibility problems. - UDDI is based on existing Internet standards and
is platform and implementation neutral. - A formal standard is expected. Specification may
have relevance to XML and metadata registries
that could be registered in UDDI registries.
36Database Catalog Efforts
- SQL has the concept of a catalog.
- Has info that database needs to operate.
- Not necessarily sharable.
- SQL has concept of Schema.
- Metadata accessible by SQL.
- Relational systems may have a dictionary, but
not specified by a standard. - Area of possible coordination betweenSC 32 WGs.
37CASE Tool Repository Efforts
- There are several proprietary encyclopedia/reposit
ory products. - Difficult to specify common model.
- SC 7/WG 11 and Crystal Data Identification File
(CDIF), a CASE Tool Interchange Format committee
have established a common core of content and an
interchange specification. - Object Management Group (OMG) Unified Modeling
Language (UML) meta-model describes UML Objects,
the Meta Object Facility (MOF) provides a
container and XMI provides for metadata transfer. - OMG UML Profile (set of stereotypes for
particular domain).
38Software Component Registry Efforts
- A lot of actual commercial base software
component registries are available in the market. - Flashline.com, ComponentAA,
ComponentSquar.com - Sometimes those components are called Business
Objects. - Software components are developed and reused
among specific vendor platforms, such as EJB,
COM, and CORBA with their own manner. - No common framework is available so far, to share
components among registries.
39Interoperability
- Interoperability approaches.
- Standards developers.
- Liaison between standards committees.
- Software developers.
- Interoperability conformance testing.
- Practitioners.
- Single points of data entry, interchange between
software.
40Four General Registry AreasA Work in Progress
Work with NIST and others in the XML Working
Group to prepare report covering registries
including descriptions of
- Discovery mechanisms.
- Repositories of XML artifacts.
- Semantic registriesBusiness content mapping.
- Application Program Interfaces (APIs).
4111179 - OASIS/ebXML Integration Approach
Data Semantic Content
ISO 11179 Registry
Classifications Associations
Extractor
Marked content domain for extraction Classificatio
n synchronization
XML Interface Service
XML Syntactic Content
ebXML Registry
Classifications Associations
42UDDI and Metadata Registry Interoperability
43What is it we need to interoperate?
- A business object framework for the common
content and how the registries might
interoperate - ebXML (electronic business XML).
- UN/CEFACT (United Nations Centre for Trade
Facilitation and Electronic Business). - OMG (Object Management Group).
- CBOP (Consortium for Business Object Promotion).
- SC 32.
44For the Interoperability of Registries
45Close look at Meta-model Framework for the
Interoperability
Software Component Registries
Common Content
Meta-meta model
Meta-model for Registering constructs
Meta-model for Mapping
Registry
46Meta-model Framework
Meta-model Framework
Standard Identification Classification Scheme
Terminology Ontology
Meta-meta-model
Standard Modeling Constructs
Meta-models
Standard Value Domain
Common Meta-models
Standard Modeling Constructs
Standard Value Domain
Standard Modeling Facility
Local meta-model
Local meta-model
Local meta-model
Registry A
Registry B
Registry C
RegistryFederation
User
47Conference 2003Open Forum
- Major topic Interoperability of registries.
- Participants
- Standards developers.
- Software developers.
- Practitioners.
- Related topics
- Tutorials on the standards.
- Tracks for application areas Environment,
Transportation, Healthcare, Energy, Aeronautics
Space, Demographics,
The Conference intends to encourage progress
toward interoperability and showcase progress
made.
48Discussion
- Larry Fitzwater
- fitzwater.larry_at_epa.gov
SDC-0002-021-JE-4029