NGDF
Metadata Gateway
Architecture V1.2
April 2000

CONTENTS

Introduction

1. Overview
2. Architecture
3. Metadata Management Systems
   • Metadata Collection
   • XML
   • Metadata Validation
4. Distributed Directories
   • Z39.50
   • Distributed Metadata Indexes
   • Distributed Search Engines
5. Distributed Search Interface
6. Internet Browser
7. Metadata Specifications
   • NGDF Discovery Metadata
   • NGDF Metadata Transfer Format
   • NGDF Communications Protocol
   • Implementation of NGDF Guidelines

APPENDICES

1. Metadata Management and Collection Tools
2. Distributed Search Engines
3. NGDF Discovery Metadata mapped to GEO