Data Stored as Objects

All Cadence tools use the Design Framework II unified database; a binary database that stores data as “objects.” There are many types of objects, each representing a distinct concept in the world of electronic design automation. Examples of object types include rectangles, terminals, instances, and cellviews.

The Design Framework II database can store both physical and logical information about a design. Physical information is stored in objects such as geometrical shapes and an IC layout. Logical information is stored in objects such as nets or schematics, which can exist without any corresponding physical realizations.

The database allows modification in read-only mode to support upgrade, bookkeeping, and analysis operations on read-only cellviews. However, these cellviews can be saved only when they are re-opened in an editable mode.

Design Framework II supports two database types, CDB and OpenAccess.

Related Topics

dbGetDatabaseType

Object Identifier (dbObject)

Object Types and Classes

Relationships Among Objects

Database Access Function Argument Types

dbIsId

dbValidP

dbobjectp

dbDeleteObject

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