Update README API version section.

README.md

@@ -1,6 +1,6 @@
 [![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://codespaces.new/NVIDIA/cccl?quickstart=1&devcontainer_path=.devcontainer%2Fdevcontainer.json)
 
-|[Contributor Guide](https://github.com/NVIDIA/cccl/blob/main/CONTRIBUTING.md)|[Dev Containers](https://github.com/NVIDIA/cccl/blob/main/.devcontainer/README.md)|[Discord](https://discord.gg/nvidiadeveloper)|[Godbolt](https://godbolt.org/z/x4G73af9a)|[GitHub Project](https://github.com/orgs/NVIDIA/projects/6)|[libcudacxx Docs](https://nvidia.github.io/libcudacxx/)|[Thrust Docs](https://nvidia.github.io/thrust/)|[CUB Docs](https://nvlabs.github.io/cub/)| 
+|[Contributor Guide](https://github.com/NVIDIA/cccl/blob/main/CONTRIBUTING.md)|[Dev Containers](https://github.com/NVIDIA/cccl/blob/main/.devcontainer/README.md)|[Discord](https://discord.gg/nvidiadeveloper)|[Godbolt](https://godbolt.org/z/x4G73af9a)|[GitHub Project](https://github.com/orgs/NVIDIA/projects/6)|[libcudacxx Docs](https://nvidia.github.io/libcudacxx/)|[Thrust Docs](https://nvidia.github.io/thrust/)|[CUB Docs](https://nvlabs.github.io/cub/)|
 |-|-|-|-|-|-|-|-|
 
 # CUDA C++ Core Libraries (CCCL)
@@ -284,20 +284,22 @@ Anything not part of the public API may change at any time without warning.
 
 #### API Versioning
 
-The entirety of CCCL's public API across all components shares a common semantic version of `MAJOR.MINOR.PATCH`.
+The public API of all CCCL's components share a unified semantic version of `MAJOR.MINOR.PATCH`.
 
 Only the most recently released version is supported.
 As a rule, features and bug fixes are not backported to previously released version or branches.
 
-For historical reasons, the library versions are encoded separately in each of Thrust/CUB/libcudacxx as follows:
+The preferred method for querying the version is to use `CCCL_[MAJOR/MINOR/PATCH_]VERSION` as described below.
+For backwards compatibility, the Thrust/CUB/libcudacxxx version definitions are available and will always be consistent with `CCCL_VERSION`.
+Note that Thrust/CUB use a `MMMmmmpp` scheme whereas the CCCL and libcudacxx use `MMMmmmppp`.
 
-|                        | libcudacxx                                | Thrust                        | CUB                        | Incremented when?                                                  |
-|------------------------|-------------------------------------------|-------------------------------|----------------------------|--------------------------------------------------------------------|
-| Header                 | `<cuda/std/version>`                      | `<thrust/version.h>`          | `<cub/version.h>`          | -                                                                  |
-| Major Version          | `_LIBCUDACXX_CUDA_API_VERSION_MAJOR`      | `THRUST_MAJOR_VERSION`        | `CUB_MAJOR_VERSION`        | Public API breaking changes (only at new CTK major release)        |
-| Minor Version          | `_LIBCUDACXX_CUDA_API_VERSION_MINOR`      | `THRUST_MINOR_VERSION`        | `CUB_MINOR_VERSION`        | Non-breaking feature additions                                     |
-| Patch/Subminor Version | `_LIBCUDACXX_CUDA_API_VERSION_PATCH`      | `THRUST_SUBMINOR_VERSION`     | `CUB_SUBMINOR_VERSION`     | Minor changes not covered by major/minor versions                  |
-| Concatenated Version   | `_LIBCUDACXX_CUDA_API_VERSION (MMMmmmppp)`| `THRUST_VERSION (MMMmmmpp)`   | `CUB_VERSION (MMMmmmpp)`   | -                                                                  |
+|                        | CCCL                                   | libcudacxx                                | Thrust                       | CUB                       |
+|------------------------|----------------------------------------|-------------------------------------------|------------------------------|---------------------------|
+| Header                 | `<cuda/version>`                       | `<cuda/std/version>`                      | `<thrust/version.h>`         | `<cub/version.h>`         |
+| Major Version          | `CCCL_MAJOR_VERSION`                   | `_LIBCUDACXX_CUDA_API_VERSION_MAJOR`      | `THRUST_MAJOR_VERSION`       | `CUB_MAJOR_VERSION`       |
+| Minor Version          | `CCCL_MINOR_VERSION`                   | `_LIBCUDACXX_CUDA_API_VERSION_MINOR`      | `THRUST_MINOR_VERSION`       | `CUB_MINOR_VERSION`       |
+| Patch/Subminor Version | `CCCL_PATCH_VERSION`                   | `_LIBCUDACXX_CUDA_API_VERSION_PATCH`      | `THRUST_SUBMINOR_VERSION`    | `CUB_SUBMINOR_VERSION`    |
+| Concatenated Version   | `CCCL_VERSION (MMMmmmppp)`             | `_LIBCUDACXX_CUDA_API_VERSION (MMMmmmppp)`| `THRUST_VERSION (MMMmmmpp)`  | `CUB_VERSION (MMMmmmpp)`  |
 
 ### Application Binary Interface (ABI)
 
@@ -376,7 +378,7 @@ For a detailed overview of the CI pipeline, see [ci-overview.md](ci-overview.md)
 Projects that are related to CCCL's mission to make CUDA C++ more delightful:
 - [cuCollections](https://github.com/NVIDIA/cuCollections) - GPU accelerated data structures like hash tables
 - [NVBench](https://github.com/NVIDIA/nvbench) - Benchmarking library tailored for CUDA applications
-- [stdexec](https://github.com/nvidia/stdexec) - Reference implementation for Senders asynchronous programming model 
+- [stdexec](https://github.com/nvidia/stdexec) - Reference implementation for Senders asynchronous programming model
 
 ## Projects Using CCCL