1. ESSnet on Data Warehousing 4th Workshop Maia Ennok 20th. of March 2013
Metadata System
ESSnet on Data Warehousing
4th Workshop
Maia Ennok
20th. of March 2013

2. The S-DWH
Maia Ennok, Metadata System

3. Metadata layer
A metadata layer is a conceptual term that refers to all metadata in a data warehouse, regardless of logical or physical organisation.
A metadata system is a system for all metadata in the metadata layer.
Maia Ennok, Metadata System

4. Goal of the Metadata System of S-DWH
Facilitate and support the operation of the S-DWH
1.4 delivery „Definition of the functionalities of a metadata system to facilitate and support the operation of the S‑DWH“
Maia Ennok, Metadata System

5. Statistical Metadata System of CMF
Model for integrated management of SMS
Maia Ennok, Metadata System

6. Functionalities of Metadata System
Metadata management:
Metadata creation
Metadata usage
Metadata maintenance
Metadata evaluation
…………..functionality groups
Maia Ennok, Metadata System

7. Metadata creation
Metadata creation is implementing metadata to the metadata system by creating or collecting metadata.
List of functionalities:
manual creation;
automated creation;
harvesting from other systems;
manual import from files;
creating links between metadata objects.
Maia Ennok, Metadata System

8. Metadata usage
All the metadata must be deployed meaning metadata must be available to users (people, systems) in the right form and with the right tools.
List of functionalities:
search;
metadata export;
international use.
Maia Ennok, Metadata System

9. Metadata maintenance
The role of metadata maintenance is to ensure that all metadata stored in the metadata repository are up-to-date for ongoing use.
List of functionalities:
maintenance of metadata history (versioning, update);
updating meta models in metadata repository;
updating links between metadata objects;
updating users and rights.
Maia Ennok, Metadata System

10. Metadata evaluation
In metadata system there should be functionalities to evaluate the quality of metadata and to assure that metadata has high quality.
List of functionalities:
metadata validation (for example check links between metadata objects);
standards usage
Maia Ennok, Metadata System

11. The S-DWH
Maia Ennok, Metadata System

12. In which layers you have metadata functionalities(multiple mark)?
Source Layer
Integration Layer
Interpretation and Analysis Layer
Access Layer
None of the above
Maia Ennok, Metadata System

13. Metadata functionalities per layer
Metadata Creation
Metadata Usage
Metadata Maintenance
Metadata Evaluation
Source Layer X
Integration Layer
Interpretation and Analysis Layer
Access Layer
Maia Ennok, Metadata System

14. Metadata Subsets Statistical metadata are data about statistical data
Process metadata are metadata that describe the expected or actual outcome of one or more processes using evaluable and operational metrics
Quality metadata are any kind of metadata that contribute to the description or interpretation of the quality of data.
Technical metadata are metadata that describe or define the physical storage or location of data
Authorisation metadata are administrative data that are used by programmes, systems or subsystems to manage users’ access to data
Maia Ennok, Metadata System

15. Which metadata subsets you have in your metadata system (mark multiple)?
Statistical metadata
Process metadata
Quality metadata
Technical metadata
Authorization metadata
None of the above
Maia Ennok, Metadata System

16. Integrated metadata system (IMETA) Statistics Estonia
MMX Metadata Repository
Metamodels in metadata repository
Statistical metadata(Neuchatel Terminology Model)
Technical metadata (Relational Database Metamodel)
Process metadata (XDTL Metamodel)
Authorization metadata (Role-Based Access Control Model) …
Links between different kind of metadata
Maia Ennok, Metadata System

17. Do you have links between different kind of metadata(multiple mark)?
No links
Links between objects of statistical metadata (ex. variable and classifier)
Links between statistical metadata and technical metadata
Links between statistical metadata and process metadata
Links between all kind of metadata
Maia Ennok, Metadata System

18. Links between columns and variables in iMETA
Maia Ennok, Metadata System

19. Functionalities in iMETA
Metadata creation
manual or automated creation; import from files or from other systems; implementing metadata repository; creating links between metadata objects
Metadata usage
search; metadata export; international use
Metadata maintenance
maintenance of metadata history (versioning, update, etc);updating meta models in metadata repository; updating links between metadata objects; updating users and rights
Metadata evaluation
metadata validation (for example check links between metadata objects);
standards usage
Maia Ennok, Metadata System

20. Thank you!