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| author | Björn Gustavsson <[email protected]> | 2014-03-25 06:58:48 +0100 |
|---|---|---|
| committer | Björn Gustavsson <[email protected]> | 2014-03-28 10:06:45 +0100 |
| commit | 70c48be27e74916dfbcee48343ede1882658832c (patch) | |
| tree | f6b77b0e204507282d54abe4d544ffc918d0171c /lib/asn1/doc/src | |
| parent | c2b4eab25c907f453a394d382c04cd04e6c06b49 (diff) | |
| download | otp-70c48be27e74916dfbcee48343ede1882658832c.tar.gz otp-70c48be27e74916dfbcee48343ede1882658832c.tar.bz2 otp-70c48be27e74916dfbcee48343ede1882658832c.zip | |
Document the asn1_OPENTYPE wrapper
Diffstat (limited to 'lib/asn1/doc/src')
| -rw-r--r-- | lib/asn1/doc/src/asn1_ug.xml | 17 | ||||
| -rw-r--r-- | lib/asn1/doc/src/asn1ct.xml | 9 |
2 files changed, 22 insertions, 4 deletions
diff --git a/lib/asn1/doc/src/asn1_ug.xml b/lib/asn1/doc/src/asn1_ug.xml index ee54fdffd7..cef7945226 100644 --- a/lib/asn1/doc/src/asn1_ug.xml +++ b/lib/asn1/doc/src/asn1_ug.xml @@ -1438,6 +1438,23 @@ StartMessage ::= SEQUENCE { <c><![CDATA[&Message]]></c> in the class. The <c>msgId</c> field is always encoded as a PrintableString, since the field refers to a fixed type in the class.</p> + <p>In practice, object sets are usually declared to be extensible so + so that more objects can be added to the set later. Extensibility is + indicated like this:</p> + <pre> +GENERAL-PROCEDURES GENERAL-PROCEDURE ::= { + object1 | object2, ...} </pre> + <p>When decoding a type that uses an extensible set constraint, + there is always the possibility that the value in the UNIQUE + field is unknown (i.e. the type has been encoded with a later + version of the ASN.1 specification). When that happens, the + unencoded data will be returned wrapped in a tuple like this:</p> + + <pre> +{asn1_OPENTYPE,Binary}</pre> + <p>where <c>Binary</c> is an Erlang binary that contains the encoded + data. (If the option <c>legacy_erlang_types</c> has been given, + just the binary will be returned.)</p> </section> <section> diff --git a/lib/asn1/doc/src/asn1ct.xml b/lib/asn1/doc/src/asn1ct.xml index 4d5a1a402a..32ff2d52cf 100644 --- a/lib/asn1/doc/src/asn1ct.xml +++ b/lib/asn1/doc/src/asn1ct.xml @@ -45,10 +45,11 @@ <p>By default in OTP 17, the representation of the BIT STRING and OCTET STRING types as Erlang terms have changed. BIT STRING values are now Erlang bitstrings and OCTET STRING values - are binaries. For details see <seealso - marker="asn1_ug#BIT STRING">BIT STRING</seealso> and <seealso - marker="asn1_ug#OCTET STRING">OCTET STRING</seealso> in User's - Guide.</p> + are binaries. Also, an undecoded open type will now be wrapped in + a <c>asn1_OPENTYPE</c> tuple. For details see <seealso + marker="asn1_ug#BIT STRING">BIT STRING</seealso>, <seealso + marker="asn1_ug#OCTET STRING">OCTET STRING</seealso>, and + <seealso marker="asn1_ug#Information%20Object">ASN.1 Information Objects</seealso> in User's Guide.</p> <p>To revert to the old representation of the types, use the <c>legacy_erlang_types</c> option.</p> </note> |