1. Common Warehouse Metamodel (CWM)
Torben Bach Pedersen

2. Metadata Integration Using Bridges
[n*(n-1)/2] udvekslinger (uden struktureret metadata skal det gøres i hånden)
Samme argument for data ved DMs uden centralt DW
Operational
Data Store
ETL
Data
Warehouse
Data
Mart
OLAP
ODS
Metadata
ETL
Metadata DW
Metadata DM
Metadata
OLAP
Metadata
BIT netværksmøde 19. september 2005

3. Metadata Integration Using CWM Adapters
Kun n udvekslinger
Som for data med centralt DW
Operational
Data Store
ETL
Data
Warehouse
Data
Mart
OLAP
ODS
Metadata
ETL
Metadata DW
Metadata DM
Metadata
OLAP
Metadata
CWM
(common metamodels,
interchange formats, and APIs)
BIT netværksmøde 19. september 2005

4. CWM (Common Warehouse Metamodel)
An OMG standard for metadata interchange in the data warehousing and business intelligence domain.
Provides a common language (metamodel) for describing metadata.
Provides an XML-based facility for interchanging metadata.
Provides APIs for accessing metadata.
Extends the OMG’s metamodeling architecture to include data warehousing and business intelligence domain concepts.
Supports the OMG’s model-driven approach to software specification and system integration
BIT netværksmøde 19. september 2005

5. OMG Metamodeling Architecture
Meta-level
OMG terms
Examples M3
Meta-metamodel
MOF Model (UML) M2
Metamodel,
meta-metadata
UML Metamodel,
CWM Metamodel M1
Model,
metadata
UML models,
Warehouse/BI metadata M0
Object,
data
Modeled systems,
Warehouse data
BIT netværksmøde 19. september 2005

6. CWM Layered Package Architecture
Warehouse
Process
Warehouse
Operation
Management
Transformation
OLAP
Data
Mining
Information
Visualization
Business
Nomenclature
Analysis
Object
(Core+Behavioral+
Relationships)
Relational
Record
Multi-
Dimensional
XML
Resource
Business
Information
Data
Types
Expressions
Keys
Index
Type
Mapping
Software
Deployment
Foundation
Core
Behavioral
Relationships
Instance
Object Model
BIT netværksmøde 19. september 2005

7. Table, Column and View (Rltnl)
BIT netværksmøde 19. september 2005

8. XMI Overview XML Metadata Interchange An XML vocabulary for
interchanging metadata in software systems
Specify a precise MOF to XML mapping
Enables automatic generation of XML documents that can be validated with generated DTDs
Allows interchange of any MOF based metamodel and corresponding models/metadata
CWM metamodel
CWM based metadata
BIT netværksmøde 19. september 2005

9. XMI Example: UML Model CarModel.xml <Class name=" Car ">
make
owns
owner
Person
<Class name="
Car
">
model
<Class.ownedElements>
drive()
<Attribute name="
make
"/>
<Attribute name="
model
"/>
<Operation name="
drive
"/>
</Class.ownedElements>
Convertible
</Class>
BIT netværksmøde 19. september 2005

10. CWM facts CWM stiftet i Initiel konkurrent: Meta Data Coalition (MDC)
IBM, Oracle, Unisys, Hyperion, Genesis, NCR, …
Initiel konkurrent: Meta Data Coalition (MDC)
BMC, Informatica, CA, NCR, Microsoft, SAS,…
Open Information Model (OIM)
Annoncerer fusion med CWM i september 2000
Version 1.0
Februar 2001
BIT netværksmøde 19. september 2005

11. CWM status Version 1.1 Meget aktiv i 2001-2003
Marts 2003 (nyeste)
De fleste store leverandører (vil i hvert fald gerne…)
576 sider basisstandard
218 sider udvidelser (IMS, COBOL, Express, Essbase,…)
Meget aktiv i
Leverandører hopper på
CWM Enablement showcases
Ikke meget aktivitet siden
Langsom standardiserings/adapterings process for V1.1
SAS og Informatica er nu med på CWM vognen
Microsoft har ikke vist noget endnu
BIT netværksmøde 19. september 2005

12. CWM Leverandør support
IBM
Metadata imp/export for Warehouse Manager,DB2 UDB+Connect
Hyperion
Essbase metadata import/export
Oracle
Oracle 9i+Warehouse Builder 3i og frem
SAS
Support for CWM i SAS System 9
Meta Integration
Meta Integration Model Bridge understøtter mange værktøjer
Business Objects
Data Integrator 6.0 data extraction and transformation værktøj
Informatica
Metadata Exchange for Data Models: bi-directional meta data exchange between Informatica Repository og CWM-baserede relationelle skemaer
BIT netværksmøde 19. september 2005

13. CWM Enablement Showcase 2001
BIT netværksmøde 19. september 2005

14. CWM Showcase 2002
BIT netværksmøde 19. september 2005