diff --git a/.gitignore b/.gitignore
index 1833712..161bbd8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 *.p
 .env
 __pycache__
+explanations
diff --git a/README.md b/README.md
index 4cdbdd5..3fed9c1 100644
--- a/README.md
+++ b/README.md
@@ -154,6 +154,24 @@ If you want to force re-importing, run `rm last_updates/rapid7_*.txt`.
 For the tracking list, use `./export_lists.sh`, the output will be in the `dist` forlder (please change the links before distributing them).
 For other purposes, tinker with the `./export.py` program.
 
+#### Explanations
+
+Note that if you created an `explanations` folder at the root of the project, a file with a timestamp will be created in it.
+It contains every rule in the database and the reason of their presence (i.e. their dependency).
+This might be useful to track changes between runs.
+
+Every rule has an associated tag with four components:
+
+1. A number: the level of the rule (1 if it is a rule present in the `rules*` folders)
+2. A letter: `F` if first-party, `M` if multi-party.
+3. A letter: `D` if a dupplicate (e.g. `foo.bar.com` if `*.bar.com` is already a rule), `_` if not.
+4. A number: the number of rules relying on this one
+
+### Generate the index webpage
+
+This is the one served on <https://hostfiles.frogeye.fr>.
+Just run `./generate_index.py`.
+
 ### Everything
 
 Once you've made sure every step runs fine, you can use `./eulaurarien.sh` to run every step consecutively.
diff --git a/export_lists.sh b/export_lists.sh
index bdd4365..0c4eb98 100755
--- a/export_lists.sh
+++ b/export_lists.sh
@@ -101,3 +101,8 @@ do
 
     done
 done
+
+if [ -d explanations ]
+then
+    ./export.py --explain > "explanations/$(date -Isec).txt"
+fi