The Tables contain the data in the database. They are organized in columns and rows.
Here you will be shown the names of these columns, their data type, the data type size, the unit, a short description, a default value (if set), and the Unified Content Descriptor. The latter one is a categorization of any parameter present in a column of a table or catalogue in a predefined scheme (see the UCD page at CDS).
Also a description of the table is given, and a list of the required constraints, ie. the primary key and key references.
Indexed variables are higlighted.