From 8ac1635491b627d71e5080106382d375e5ead601 Mon Sep 17 00:00:00 2001
From: Anne van Kesteren <annevk@annevk.nl>
Date: Mon, 6 Jul 2020 13:50:28 +0200
Subject: [PATCH] Quota is not supposed to be a function of available space

Also make it clear usage and quota for storage shelves are ultimately implementation-defined.

Helps with #95 and #70.

Closes #106.
---
 storage.bs | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/storage.bs b/storage.bs
index c989039..e573c9e 100644
--- a/storage.bs
+++ b/storage.bs
@@ -471,20 +471,21 @@ locally.
 
 <h2 id=usage-and-quota>Usage and quota</h2>
 
-<p>The <dfn export>storage usage</dfn> of a <a>storage shelf</a> is a rough estimate of the amount
-of bytes used by it.
+<p>The <dfn export>storage usage</dfn> of a <a>storage shelf</a> is an <a>implementation-defined</a>
+rough estimate of the amount of bytes used by it.
 
 <p class=note>This cannot be an exact amount as user agents might, and are encouraged to, use
 deduplication, compression, and other techniques that obscure exactly how much bytes a
 <a>storage shelf</a> uses.
 
-<p>The <dfn export>storage quota</dfn> of a <a>storage shelf</a> is a conservative estimate of the
-total amount of bytes it can hold. This amount should be less than the total available storage space
-on the device to give users some wiggle room.
+<p>The <dfn export>storage quota</dfn> of a <a>storage shelf</a> is an <a>implementation-defined</a>
+conservative estimate of the total amount of bytes it can hold. This amount should be less than the
+total storage space on the device. It must not be a function of the available storage space on the
+device.
 
 <p class=note>User agents are strongly encouraged to consider navigation frequency, recency of
 visits, bookmarking, and <a href="#persistence">permission</a> for {{"persistent-storage"}} when
-evaluating quotas.
+determining quotas.