SDB_ST - Instance type

Enumarators overview

• ST_BASE (3) - Basic type
  
• ST_CLASS (7) - Class Structure
  
• ST_CODE (5) - 16 bit enumeration
  
• ST_KEY (2) - Key structure
  
• ST_SYS (4) - System Structure Definitions
  
• ST_USER (1) - Application structures
  
• ST_VIEW (6) - View structure
  

Enumerator details

1. ST_USER - Application structures
   

   Application structures are defined in the context of an application.

   Code: 1
   to list
2. ST_KEY - Key structure
   

   Key structures are usually defined as substructures (subset of properties for a given structure) in the context of a structure. Key structures may contain, however, also properties, which are defined in related structures, or operations.

   Code: 2
   to list
3. ST_BASE - Basic type
   

   Basic types are elementary types as INT or DATE. Those types do have structure definitions as well, even though they do not have members.

   Code: 3
   to list
4. ST_SYS - System Structure Definitions
   

   System structure definitions are structures that are defined in the ODABA kernel. System structures are defined as part of the ODABA library (OPAnn.DLL) and are available in any application. An application may specialize system structures, but cannot change them.

   Code: 4
   to list
5. ST_CODE - 16 bit enumeration
   

   Code sets or enumerations are usually simple classifications, which define categories (classes) for a group of objects.16 bit enumerations allow 16 bit code values, only, which are stored externally in 2 bytes. Internally, enumerator codes use 32 bit numbers, always.

   Notes:

   16 bit enumerations are supported for compatibility reasons, only.

   Code: 5
   to list
6. ST_VIEW - View structure
   

   View structures are structures that are defined as view.

   Code: 6
   to list
7. ST_CLASS - Class Structure
   

   Class structures are structures, which are not stored in the database but implemented as classes only (C++, document, window, expression classes etc.)

   Code: 7
   to list