Update README.rst

Signed-off-by: Jono Yang <[email protected]>

README.rst

@@ -1,10 +1,10 @@
 MatchCode toolkit
 =================
-MatchCode toolkit is a Python library that provides the directory fingerprinting
-functionality for `ScanCode toolkit <https://github.com/nexB/scancode-toolkit>`_
-and `ScanCode.io <https://github.com/nexB/scancode.io>`_ by implementing the
-HaloHash algorithm and using it in ScanCode toolkit and ScanCode.io plugins and
-pipelines.
+MatchCode toolkit is a Python library that provides the file and directory
+fingerprinting functionality for `ScanCode toolkit
+<https://github.com/nexB/scancode-toolkit>`_ and `ScanCode.io
+<https://github.com/nexB/scancode.io>`_ by implementing the HaloHash algorithm
+and using it in ScanCode toolkit and ScanCode.io plugins and pipelines.
 
 
 Installation
@@ -48,6 +48,8 @@ Resources and computes those values for directories.
 MatchCode toolkit provides the ``scan_and_fingerprint_package`` and
 ``fingerprint_codebase`` pipelines for ScanCode.io.
 
+These pipelines add resource and directory fingerprints to the ``extra_data`` field.
+
 
 License
 -------