What Is a Data Catalog
What is called a data catalog, portal, repository and aggregator, and what this book does not cover.
Why Catalogs Exist and Who Uses Them
The catalog owner's motives and the user groups, from people to search engines and software.
Anatomy of a Catalog
What a data catalog is made of: records, datasets, series and versions, distributions and services, publishers and themes, the software inside, and the entrances for people and programs.
The World of Catalogs in Numbers
How many public data catalogs exist in the world, what types they are and what they run on.