About the extended attribute system tables

When you provide application-based information such as the text to use for labels and headings for the columns, validation rules, display formats, and edit styles for a database table, PocketBuilder stores this information in system tables in your database. These system tables are called the extended attribute system tables. The tables contain all the information related to the extended attributes for the tables and columns in the database. The extended attributes are used in DataWindow objects.

The system tables

There are five extended attribute system tables.

**Table A-1: List of extended attribute system tables**
Table	Contains information about
PBCatTbl	Tables in the database
PBCatCol	Columns in the database
PBCatFmt	Display formats
PBCatVld	Validation rules
PBCatEdt	Edit styles

What to do with the tables

You can open and look at these tables just like other tables, in the Database painter. You might want to create a report of the extended attribute information used in your database by building a DataWindow object whose data source is the extended attribute system tables.

Caution You should not change the values in the extended attribute system tables. PocketBuilder maintains this information automatically whenever you change information for a table or column in the Database painter.