From dc0358cf434deda3ede3f8bdce6f21621804e4d4 Mon Sep 17 00:00:00 2001
From: MarcoGorelli <33491632+MarcoGorelli@users.noreply.github.com>
Date: Thu, 29 Jun 2023 13:54:35 +0100
Subject: [PATCH 1/2] clarify __dataframe_standard__, introduce
 __column_standard__

---
 protocol/purpose_and_scope.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/protocol/purpose_and_scope.md b/protocol/purpose_and_scope.md
index 70dba143..4da6e655 100644
--- a/protocol/purpose_and_scope.md
+++ b/protocol/purpose_and_scope.md
@@ -76,6 +76,13 @@ def somefunc(df, ...):
     # From now on, use `df` methods and `namespace` functions/objects
 ```
 
+Libraries which implement the Standard in a separate namespace
+are required to provide the following methods:
+- ``__dataframe_standard__``: used for converting a non-compliant dataframe to a compliant one;
+- ``__column_standard__``: used for converting a non-compliant column to a compliant one.
+
+For example, pandas would have ``pandas.DataFrame.__dataframe_standard__`` and
+``pandas.Series.__column_standard__``.
 
 ### History
 

From 2a3a964884b56dc3ff7c1e87fc87ab286f95bc69 Mon Sep 17 00:00:00 2001
From: MarcoGorelli <33491632+MarcoGorelli@users.noreply.github.com>
Date: Thu, 29 Jun 2023 17:35:15 +0100
Subject: [PATCH 2/2] move to spec

---
 protocol/purpose_and_scope.md | 8 --------
 spec/purpose_and_scope.md     | 8 ++++++++
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/protocol/purpose_and_scope.md b/protocol/purpose_and_scope.md
index 4da6e655..79c0261b 100644
--- a/protocol/purpose_and_scope.md
+++ b/protocol/purpose_and_scope.md
@@ -76,14 +76,6 @@ def somefunc(df, ...):
     # From now on, use `df` methods and `namespace` functions/objects
 ```
 
-Libraries which implement the Standard in a separate namespace
-are required to provide the following methods:
-- ``__dataframe_standard__``: used for converting a non-compliant dataframe to a compliant one;
-- ``__column_standard__``: used for converting a non-compliant column to a compliant one.
-
-For example, pandas would have ``pandas.DataFrame.__dataframe_standard__`` and
-``pandas.Series.__column_standard__``.
-
 ### History
 
 Dataframe libraries in several programming language exist, such as
diff --git a/spec/purpose_and_scope.md b/spec/purpose_and_scope.md
index a08025a6..01684752 100644
--- a/spec/purpose_and_scope.md
+++ b/spec/purpose_and_scope.md
@@ -359,3 +359,11 @@ completed such an implementation may, and are encouraged to, provide details on
 the level of (non-)conformance. For details on how to do this, see
 [Verification - measuring conformance](verification_test_suite.md).
 
+Libraries which implement the Standard in a separate namespace
+are required to provide the following methods:
+- ``__dataframe_standard__``: used for converting a non-compliant dataframe to a compliant one;
+- ``__column_standard__``: used for converting a non-compliant column to a compliant one.
+
+For example, pandas would have ``pandas.DataFrame.__dataframe_standard__`` and
+``pandas.Series.__column_standard__``.
+