Summary
The titles of many API overview pages don't properly reflect what the pages actually contain. The pages should be renamed, or content should be separated out, or both.

Details

• The "<Qt Module> C++ Classes" page also contain Namespaces
  • It should be called "<Qt Module> C++ Classes and Namespaces"
  • Originally, the plan was to call it "<Qt Module> C++ API (comments, https://codereview.qt-project.org/#change,52610), but then it doesn't cover all C++ API
    • Enums, functions and macros are in the Namespace pages (e.g. http://qt-project.org/doc/qt-5.0/qtconcurrent/qtconcurrent.html)
  • e.g. http://doc-snapshot.qt-project.org/qt5-dev/qtmultimedia/qtmultimedia-module.html
  • https://doc-snapshots.qt.io/qt6-dev/classes.html Updated version
• The "All QML APIs by Module" page lists QML Types
  • https://doc-snapshots.qt.io/qt6-dev/modules-qml.html Updated version
  • Would the "QML Types" page ever grow to include anything other than QML types? If so, the lists should be named "<Qt Module> QML API". If not, the master list should be named "All QML Types by Module" for consistency
• QDoc is getting new variables which should be changed if the "C++ Classes" and "QML Types" pages are renamed
  • https://codereview.qt-project.org/#change,48379
  • navigation.cppclassespage
  • navigation.qmltypespage
• The QtGlobal Header page is like a Namespace page
  • http://qt-project.org/doc/qt-5.0/qtcore/qtglobal.html
  • (Probably not an issue)
• The "Qt Reference Pages" page lumps Modules, Namespaces, and QML API with C++ Classes
  • https://doc-snapshots.qt.io/qt6-dev/reference-overview.html Updated version
• The "Class and Function Documentation" page lumps Modules, Namespaces, and QML API with the C++ Classes
  • http://qt-project.org/doc/qt-5.0/qtdoc/classlists.html
  • Furthermore, its URL is "classlists.html"
  • https://doc-snapshots.qt.io/qt6-dev/reference-overview.html#class-lists Updated version 
• The "All Functions" page lumps Macros with Functions
  • http://qt-project.org/doc/qt-5.0/qtdoc/functions.html
  • https://doc-snapshots.qt.io/qt6-dev/functions.html Updated version
  • They should be separated, or renamed "All Functions and Macros"
• The "All Classes by Module" page includes...
  • The "<Qt Module> C++ Classes" pages (which actually includes Namespaces too)
  • The "Class and Function Documentation" page (which includes Functions, and isn't grouped by Module)
  • https://doc-snapshots.qt.io/qt6-dev/whatsnew60.html#new-classes-and-functions Updated version

Appendix
The current (partial) doc hierarchy is:

- MODULE LANDING PAGE
    - C++ CLASSES
        - C++ class list
        - C++ namespace list
            - C++ type (enum) list
            - C++ function list
            - C++ macro list
    - QML TYPES
        - QML type list