The ABAP - Keyword Documentation describes the syntax and meaning of the keywords of the ABAP language and its object-oriented part ABAP Objects.
To enable the language help, the corresponding ICF service needs to be activated. For more information, see the chapter "3.1 ABAP Language Help, ABAP Problem Help, ABAP Element Info" in the corresponding Configuration Guide for Configuring the ABAP Back-end for ABAP.
While editing ABAP source code, you will generally need to fall back on the ABAP language help. Here, you can to find more information about the syntax and meaning an ABAP keyword. For this, ABAP Development Tools provides a context-sensitive link from within the ABAP source editor. The help content is displayed in a separate help view.
The content comes from the back-end system, so it is correct for the release of the ABAP project in which you are working.