-.\" $OpenBSD: d2i_ASN1_BOOLEAN.3,v 1.1 2021/11/21 15:11:01 schwarze Exp $
+.\" $OpenBSD: d2i_ASN1_BOOLEAN.3,v 1.2 2021/11/21 15:16:45 schwarze Exp $
.\"
.\" Copyright (c) 2021 Ingo Schwarze <schwarze@openbsd.org>
.\"
.Xr ASN1_get_object 3 ,
.Xr ASN1_item_d2i 3 ,
.Xr ASN1_put_object 3
+.Sh STANDARDS
+ITU-T Recommendation X.690, also known as ISO/IEC 8825-1:
+Information technology - ASN.1 encoding rules:
+Specification of Basic Encoding Rules (BER), Canonical Encoding
+Rules (CER) and Distinguished Encoding Rules (DER),
+section 8.2: Encoding of a boolean value
.Sh HISTORY
.Fn d2i_ASN1_BOOLEAN
and