From 878026bacc17bb641046a2cf5e672530e71e463e Mon Sep 17 00:00:00 2001
From: Dorian Lesbre <53176929+dlesbre@users.noreply.github.com>
Date: Sun, 22 Oct 2023 14:49:48 +0200
Subject: [PATCH] Add DOI comments

---
 README.md | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 7dbf332..a23c4e4 100644
--- a/README.md
+++ b/README.md
@@ -73,9 +73,11 @@ their databases.
 
 **How does it find matches?**
 
-`btac` queries the websites using the entry DOI if known otherwise the title. So
+`btac` queries the websites using the entry DOI (if known) or its title. So
 entries that don't have one of those two fields *will not* be completed.
-- Titles should be the full title, they are compared excluding case and
+- DOIs are only used if they can be recognized, so the `doi` field should
+  contain "10.xxxx/yyyy" or an URL ending with it.
+- Titles should be the full title. They are compared excluding case and
   punctuation, but titles with missing words will not match.
 - If one or more authors are present, entries with no common authors will not
   match. Authors are compared using lower case last names only. Be sure to use