diff options
Diffstat (limited to 'lib/asn1/doc/src/asn1_introduction.xml')
| -rw-r--r-- | lib/asn1/doc/src/asn1_introduction.xml | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/lib/asn1/doc/src/asn1_introduction.xml b/lib/asn1/doc/src/asn1_introduction.xml new file mode 100644 index 0000000000..ae0379684a --- /dev/null +++ b/lib/asn1/doc/src/asn1_introduction.xml @@ -0,0 +1,99 @@ +<?xml version="1.0" encoding="utf-8" ?> +<!DOCTYPE chapter SYSTEM "chapter.dtd"> + +<chapter> + <header> + <copyright> + <year>1997</year><year>2013</year> + <holder>Ericsson AB. All Rights Reserved.</holder> + </copyright> + <legalnotice> + The contents of this file are subject to the Erlang Public License, + Version 1.1, (the "License"); you may not use this file except in + compliance with the License. You should have received a copy of the + Erlang Public License along with this software. If not, it can be + retrieved online at http://www.erlang.org/. + + Software distributed under the License is distributed on an "AS IS" + basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See + the License for the specific language governing rights and limitations + under the License. + + </legalnotice> + + <title>Introduction</title> + <prepared></prepared> + <docno></docno> + <date>2015-03-31</date> + <rev>A</rev> + <file>asn1_introduction.xml</file> + </header> + + <p>The <c>ASN.1</c> application provides the following:</p> + + <list type="bulleted"> + <item>An ASN.1 compiler for Erlang, which generates encode and + decode functions to be used by Erlang programs sending and + receiving ASN.1 specified data.</item> + <item>Runtime functions used by the generated code.</item> + <item>Support for the following encoding rules: + <list><item>Basic Encoding Rules (BER)</item> + <item>Distinguished Encoding Rules (DER), a specialized form of + BER that is used in security-conscious applications</item> + <item>Packed Encoding Rules (PER), both the aligned and + unaligned variant</item> + </list> + </item> + </list> + + <section> + <title>Scope</title> + <p>This application covers all features of ASN.1 up to the 1997 + edition of the specification. In the 2002 edition, + new features were introduced. The following features + of the 2002 edition are fully or partly supported:</p> + <list type="bulleted"> + <item> + <p>Decimal notation (for example, <c>"1.5e3</c>) for REAL values. + The NR1, NR2, and NR3 formats as explained in ISO 6093 are + supported.</p> + </item> + <item> + <p>The <c>RELATIVE-OID</c> type for relative object identifiers is + fully supported.</p> + </item> + <item> + <p>The subtype constraint (<c>CONTAINING</c>/<c>ENCODED BY</c>) to + constrain the content of an octet string or a bit string is + parsed when compiling, but no further action is taken. This + constraint is not a PER-visible constraint.</p> + </item> + <item> + <p>The subtype constraint by regular expressions (<c>PATTERN</c>) + for character string types is parsed when compiling, but no + further action is taken. This constraint is not a + PER-visible constraint.</p> + </item> + <item> + <p>Multiple-line comments as in C, <c>/* ... */</c>, are + supported.</p> + </item> + </list> + </section> + + <section> + <title>Prerequisites</title> + <p>It is assumed that the reader is familiar with the Erlang + programming language, concepts of OTP, and is familiar with the + ASN.1 notation. The ASN.1 notation is documented in the standard + definition X.680, which is the primary text. It can also be + helpful, but not necessary, to read the standard definitions + X.681, X.682, X.683, X.690, and X.691.</p> + <p>A good book explaining those reference texts is + Dubuisson: ASN.1 - Communication Between Heterogeneous Systems, + is free to download at + <url href="http://www.oss.com/asn1/dubuisson.html">http://www.oss.com/asn1/dubuisson.html</url>.</p> + </section> + +</chapter> + |