Add PEP 770 to specifications

Author: sethmlarson

source/specifications/binary-distribution-format.rst

@@ -253,6 +253,20 @@ The .dist-info directory
    installation will fail if any file in the archive is not both
    mentioned and correctly hashed in RECORD.
 
+Subdirectories in :file:`.dist-info/`
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Subdirectories under `.dist-info` are reserved for future use.
+The following subdirectory names under `.dist-info` are reserved for specific usage:
+
+================= ==============
+Subdirectory name PEP / Standard
+================= ==============
+``licenses``      :pep:`639`
+``license_files`` :pep:`639`
+``LICENSES``      `REUSE licensing framework <https://reuse.software>`__
+``sboms``         :pep:`770`
+================= ==============
 
 The :file:`.dist-info/licenses/` directory
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -263,6 +277,12 @@ fields is specified, the :file:`.dist-info/` directory MUST contain a
 ``License-File`` fields in the :file:`METADATA` file at their respective paths
 relative to the :file:`licenses/` directory.
 
+The :file:`.dist-info/sboms/` directory
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+All files contained within the :file:`.dist-info/sboms` directory MUST
+be Software Bill-of-Materials (SBOM) files that describe software contained
+within the distribution archive.
 
 The .data directory
 ^^^^^^^^^^^^^^^^^^^

source/specifications/recording-installed-packages.rst

@@ -66,10 +66,11 @@ The ``METADATA`` file is mandatory.
 All other files may be omitted at the installing tool's discretion.
 Additional installer-specific files may be present.
 
-This :file:`.dist-info/` directory may contain the following directory, described in
+This :file:`.dist-info/` directory may contain the following directories, described in
 detail below:
 
 * :file:`licenses/`: contains license files.
+* :file:`sboms/`: contains Software Bill-of-Materials files (SBOMs).
 
 .. note::
 
@@ -235,6 +236,15 @@ the :file:`METADATA` file at their respective paths relative to the
 Any files in this directory MUST be copied from wheels by the install tools.
 
 
+The :file:`sboms/` subdirectory
+==================================
+
+All files contained within the :file:`.dist-info/sboms` directory MUST
+be Software Bill-of-Materials (SBOM) files that describe software contained
+within the installed package.
+Any files in this directory MUST be copied from wheels by the install tools.
+
+
 Intentionally preventing changes to installed packages
 ======================================================