Migration and continuous delivery in documentation
The Db2® 13 migration process affects how you will use this information.
The Db2 13 migration process and continuous delivery of new capabilities can affect how you use this information. Before you activate new function in Db2 13, you might need to continue to refer to the documentation for the previous release.
Documentation updates for continuous delivery
Most documentation topics for Db2 13 for z/OS® assume that the highest available function level is activated and that your applications are running with the highest available application compatibility level, with the following exceptions:
- The following documentation sections describe the Db2 13 migration process and how to activate new capabilities in function levels:
- FL 500 A label like this one usually marks documentation changed for function level 500 or higher, with a link to the description of the function level that introduces the change in Db2 13. For more information, see How Db2 function levels are documented.
The availability of new function in Db2 13 depends on the type of enhancement, the activated function level, and the application compatibility levels of the applications. For a list of all available function levels in Db2 13, see Db2 13 function levels.
- Function level 100
- Db2 starts at function level 100 (V13R1M100) during migration to Db2 13, and fallback and coexistence with Db2 12 in data sharing remain possible. Many new capabilities in Db2 13 remain unavailable. For more information, see Function level 100 (for migrating to Db2 13 - May 2022).
- Function level 500
- Activating function level 500 (V13R1M500) prevents coexistence with and fallback to Db2 12. Function level 500 is also the first opportunity for applications to use many of the new capabilities in Db2 13. However, new capabilities that depend on Db2 13 catalog changes remain unavailable. For more information, see Function level 500 (for migrating to Db2 13 - May 2022).
- Function level 501
- Function level 501 (V13R1M501) is the first opportunity after migration to Db2 13 for applications to use new features and capabilities that depend on catalog changes in Db2 13. For more information, see Function level 501 (Db2 13 installation or migration - May 2022).
Some virtual storage and optimization enhancements take effect in function level 100. Optimization enhancements become available after full prepare of the SQL statements, depending on the statement type:
- For static SQL statements, after bind or rebind of the package.
- For non-stabilized dynamic SQL statements, immediately, unless the statement is in the dynamic statement cache.
- For stabilized dynamic SQL statements, after invalidation, free, or changed application compatibility level.
Revision marks for changed content
Technical revisions are marked like this paragraph to identify any of the following types of changes: 
- Changes that are introduced at general availability (GA) in the Db2 13 release.
- Changes that are introduced by maintenance after the GA of Db2 13.
- Changes introduced in new Db2 13 function levels.
- Clarifications in response to customer and internal feedback.
Editorial and organizational changes that do not affect the technical meaning of the content are generally not marked.