Chapter 6 Metadata Services
6.1 Metadata Services as an Infrastructure
6.2 Metadata Registries
6.2.1 Functional Requirements
6.2.2 Types
6.2.3 Essential Components
6.3 Metadata Repositories
6.3.2 Metadata Harvesting Model
6.3.3 OAI-PMH Commands
6.3.4 Support for Multiple Description Formats in OAI-PMH
6.4 Metadata as Linked Data
6.4.1 Two Roles of LAMs
6.4.2 Using Knowledge Organization Systems (KOS) as the Connectors of Linked Datasets
6.4.3 Metadata in Information Silos
6.4.4 Factors Impacting Metadata Linkability
6.5 Ensuring Optimal Metadata Discovery, Increasing Findability
6.5.1 Metadata Retrieval
6.5.2 Metadata Exposure Methods
6.6 Summary
Chapter 7: Metadata Quality Measurement and Improvement
7.1 Quality of Metadata
7.2 Meeting the Functional Requirements
7.3 Quality Measurement with Different Granularities
7.4 Measurement Indicators: CCCD
7.4.1 Completeness
7.4.2 Correctness
7.4.3 Consistency
7.4.4 Duplication Analysis
7.5 Metadata Evaluation
7.6 Enhancing Quality of Metadata
7.7 Entity-level Quality for Reusable Metadata