update
diff --git a/asn1c/tests/data-70/README b/asn1c/tests/data-70/README
index 4a47a51..91019ad 100644
--- a/asn1c/tests/data-70/README
+++ b/asn1c/tests/data-70/README
@@ -1,8 +1,8 @@
Mode of operation:
- Each of the *.in files is XER-decoded, then converted into DER,
- then decoded from DER and encoded into XER again, and compared
- to the original encoding.
+ Each of the *.in files is XER-decoded, then converted into DER or PER,
+ then decoded back from DER (PER), then encoded into XER again,
+ and finally compared to the original encoding.
Naming conventions: