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notes.xml
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notes.xml
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<?xml version="1.0" encoding="latin1" ?>
<!DOCTYPE chapter SYSTEM "chapter.dtd">
<chapter>
<header>
<copyright>
<year>2004</year><year>2011</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>asn1 Release Notes</title>
<prepared>otp_appnotes</prepared>
<docno>nil</docno>
<date>nil</date>
<rev>nil</rev>
<file>notes.xml</file>
</header>
<p>This document describes the changes made to the asn1 application.</p>
<section><title>Asn1 1.7</title>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
Some ASN.1 INTEGER type and SEQUENCE constructor variants
previously not handled by the ASN.1 compiler are now
correctly handled</p>
<p>
Own Id: OTP-9688</p>
</item>
<item>
<p>
An INTEGER with a value constraint where unions are used
e.g. X1 ::= INTEGER (1..4 | 6 | 8 | 10 | 20) is not
handled correctly. For PER the value is encoded in wrong
number of bits.</p>
<p>
Own Id: OTP-9946</p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6.19</title>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
The linked-in driver used for ber decode and per encode
has been replaced with nifs. To enable the usage of nifs
pass the nif option to erlc or asn1rt:compile when
compiling. If you previously used the linked-in driver,
you have to recompile your ASN1 modules with the current
version of asn1 application as the linked-in driver
modules have been removed.</p>
<p>
*** POTENTIAL INCOMPATIBILITY ***</p>
<p>
Own Id: OTP-9419</p>
</item>
<item>
<p>
A few of the heavy calculations which are done for
encoding and decoding operations when dealing with
SEQUENCE OF and DEFAULT in runtime have been moved to be
done in compile time instead.</p>
<p>
Own Id: OTP-9440</p>
</item>
<item>
<p>
When compiling an ASN.1 ber module with the +nif option,
the module will use a new nif for ber encoding,
increasing performance by about 5%.</p>
<p>
Own Id: OTP-9441</p>
</item>
<item>
<p>
Tuple funs (a two-element tuple with a module name and a
function) are now officially deprecated and will be
removed in R16. Use '<c>fun M:F/A</c>' instead. To make
you aware that your system uses tuple funs, the very
first time a tuple fun is applied, a warning will be sent
to the error logger.</p>
<p>
Own Id: OTP-9649</p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6.18</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
Implement or fix -Werror option</p>
<p>
If -Werror is enabled and there are warnings no output
file is written. Also make sure that error/warning
reporting is consistent. (Thanks to Tuncer Ayaz)</p>
<p>
Own Id: OTP-9536</p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6.17</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
Test cases which started failing when timer:tc was
changed to not catch are corrected.</p>
<p>
Own Id: OTP-9286</p>
</item>
<item>
<p>
The bounds checking in the asn1_erl_driver when the
length value of a TLV is a Long Definite Length is
corrected. Thanks to Vance Shipley.</p>
<p>
Own Id: OTP-9303</p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6.16</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
asn1ct: Make formatting of errors and warnings consistent</p>
<p>
Consistently format warning and error reports. Warning
and error options from erlc now also work in asnc1ct.
(thanks to Tuncer Ayaz)</p>
<p>
Own Id: OTP-9062</p>
</item>
<item>
<p>
Shut off some dialyzer warnings</p>
<p>
Own Id: OTP-9063</p>
</item>
</list>
</section>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
Crash in asn1ct_check, componentrelation_leadingattr
fixed. (Thanks to Stephane Pamelard for finding the bug)</p>
<p>
Own Id: OTP-9092</p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6.15</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
The encoding of ExtensionAdditionGroup (for PER and UPER)
is corrected.</p>
<p>
Own Id: OTP-8866 Aux Id: OTP-8797, SEQ-11557 </p>
</item>
<item>
<p>
A race condition when several processes in parallel start
to do encode/decode using the driver could cause an error
log regarding crashing port owner process. This race is
now eliminated.</p>
<p>
Own Id: OTP-8948 Aux Id: seq11733 </p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6.14.1</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
Extension Addition Groups are now supported by the parser
and in all backends.</p>
<p>
Own Id: OTP-8598 Aux Id: seq-11557 </p>
</item>
<item>
<p>
Extension Addition Groups are now supported in nested
types within a SEQUENCE and CHOICE as well (missed that
in previous fix)</p>
<p>
Own Id: OTP-8797 Aux Id: seq-11557 </p>
</item>
</list>
</section>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
Bug in UNALIGNED PER regarding encoding and decoding of
constrained numbers with a valuerange > 1024. (Thanks to
Vincent de Phily)</p>
<p>
Own Id: OTP-8779</p>
</item>
<item>
<p>
Minor corrections in the User Guide.</p>
<p>
Own Id: OTP-8829</p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6.14</title>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
By default, the ASN.1 compiler is now silent in the
absence of warnings or errors. The new '<c>verbose</c>'
option or the '<c>-v</c>' option for <c>erlc</c> can be
given to show extra information (for instance, about the
files that are generated). (Thanks to Tuncer Ayaz.)</p>
<p>
Own Id: OTP-8565</p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6.13</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
Harmless buffer overflow by one byte in asn1 and
ram_file_drv.</p>
<p>
Own Id: OTP-8451</p>
</item>
</list>
</section>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>Cross compilation improvements and other build system
improvements.</p>
<p>Most notable:</p> <list><item> Lots of cross
compilation improvements. The old cross compilation
support was more or less non-existing as well as broken.
Please, note that the cross compilation support should
still be considered as experimental. Also note that old
cross compilation configurations cannot be used without
modifications. For more information on cross compiling
Erlang/OTP see the <c>$ERL_TOP/INSTALL-CROSS.md</c> file.
</item><item> Support for staged install using <url
href="http://www.gnu.org/prep/standards/html_node/DESTDIR.html">DESTDIR</url>.
The old broken <c>INSTALL_PREFIX</c> has also been fixed.
For more information see the <c>$ERL_TOP/INSTALL.md</c>
file. </item><item> Documentation of the <c>release</c>
target of the top <c>Makefile</c>. For more information
see the <c>$ERL_TOP/INSTALL.md</c> file. </item><item>
<c>make install</c> now by default creates relative
symbolic links instead of absolute ones. For more
information see the <c>$ERL_TOP/INSTALL.md</c> file.
</item><item> <c>$ERL_TOP/configure --help=recursive</c>
now works and prints help for all applications with
<c>configure</c> scripts. </item><item> Doing <c>make
install</c>, or <c>make release</c> directly after
<c>make all</c> no longer triggers miscellaneous
rebuilds. </item><item> Existing bootstrap system is now
used when doing <c>make install</c>, or <c>make
release</c> without a preceding <c>make all</c>.
</item><item> The <c>crypto</c> and <c>ssl</c>
applications use the same runtime library path when
dynamically linking against <c>libssl.so</c> and
<c>libcrypto.so</c>. The runtime library search path has
also been extended. </item><item> The <c>configure</c>
scripts of <c>erl_interface</c> and <c>odbc</c> now
search for thread libraries and thread library quirks the
same way as <c>erts</c> do. </item><item> The
<c>configure</c> script of the <c>odbc</c> application
now also looks for odbc libraries in <c>lib64</c> and
<c>lib/64</c> directories when building on a 64-bit
system. </item><item> The <c>config.h.in</c> file in the
<c>erl_interface</c> application is now automatically
generated in instead of statically updated which reduces
the risk of <c>configure</c> tests without any effect.
</item></list>
<p>(Thanks to Henrik Riomar for suggestions and
testing)</p>
<p>(Thanks to Winston Smith for the AVR32-Linux cross
configuration and testing)</p>
<p>
*** POTENTIAL INCOMPATIBILITY ***</p>
<p>
Own Id: OTP-8323</p>
</item>
<item>
<p>
Add support for prefixing macro names generated by the
compiler</p>
<p>
This is useful when multiple protocols that contains
macros with identical names are included in a single
module.</p>
<p>
Add the missing <c>record_name_prefix</c> compiler option
to the documentation.</p>
<p>
Own Id: OTP-8453</p>
</item>
<item>
<p>
Cleanups suggested by tidier and modernization of types
and specs.</p>
<p>
Own Id: OTP-8455</p>
</item>
<item>
<p>
Support for <c>EXTENSIBILITY IMPLIED</c> and <c>SET/SEQ
OF NamedType</c> is added.</p>
<p>
Own Id: OTP-8463</p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6.12</title>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
The documentation is now built with open source tools
(xsltproc and fop) that exists on most platforms. One
visible change is that the frames are removed.</p>
<p>
Own Id: OTP-8256</p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6.11</title>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
A new option <c>{n2n,TypeName}</c> can be used to
enable generation of conversion functions from name to number
and vice versa for selected ENUMERATION types.
The option can be repeated many times in order to specify several
types in the same file.<br/>
If the <c>TypeName</c> specified does not exists or is not an
ENUMERATION type, the compilation will be terminated with an
error code.<br/>
Below follows an example on how to use the option from the command line with <c>erlc</c>:<br/>
<c>erlc -bper_bin +optimize +driver +"{n2n,'CauseMisc'}" +"{n2n,'CausePcl'}" MyModyle.asn</c>
</p>
<p>
Own Id: OTP-8136 Aux Id: seq11347 </p>
</item>
<item>
<p>
Range checks added for BIT STRING with fixed SIZE
constraint.</p>
<p>
Own Id: OTP-7972 Aux Id: seq11280 </p>
</item>
<item>
<p>
Now support multiple-line comments in asn1-specs as
specified in ASN1 X.680 (07/2002), section 11.6.4</p>
<p>
Own Id: OTP-8043</p>
</item>
<item>
<p>
Now parses and adds abstract syntax for PATTERN subtype
constraint. No other action is taken on this type of
constraint.</p>
<p>
Own Id: OTP-8046</p>
</item>
<item>
<p>
The ASN1 subtype constraint <c>CONTAINING Type</c>,
<c>CONTAINING Type ENCODED BY Value</c> and <c>ENCODED BY
Value</c> now is parsed. Abstract syntax is added but no
further action in generated code is taken.</p>
<p>
Own Id: OTP-8047</p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6.10</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
A faulty receive case that catch-ed all messages in the
initialization of the driver has been removed, the
initialization has been restructured.</p>
<p>
Own Id: OTP-7954 Aux Id: seq11220 </p>
</item>
</list>
</section>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
The anonymous part of the decode that splits the ASN1 TLV
into Tag Value tuples has been optimized.</p>
<p>
Own Id: OTP-7953</p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6.9</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
Error that caused crash when drivers were loaded is now
corrected. Parallel driver for asn1 now enabled.</p>
<p>
Own Id: OTP-7904 Aux Id: seq11220 </p>
</item>
</list>
</section>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
Optimized code for ENUMERATION type in encoder/decoder.</p>
<p>
Own Id: OTP-7909</p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6.8.1</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
Removed parallel-driver functionality due to failure
when loading the driver.</p>
<p>
Own Id: OTP-7900 Aux Id: seq11220 </p>
</item>
</list>
</section>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
Generated code now uses guards that is not obsolete, e.g.
<c>is_integer/1</c> instead of <c>integer/1</c>.</p>
<p>
Own Id: OTP-7910</p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6.8</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
A BIT STRING with a size constraint that has a single
value and an extension as in <c> BIT STRING (SIZE
(16,...))</c> was erroneous encoded/decoded. This is now
corrected and follows X.691 Section 15.6.</p>
<p>
Own Id: OTP-7876 Aux Id: seq11220 </p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6.7</title>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
Now asn1 starts multiple drivers to enable simultaneous
encode/decode in different processes for the
asn1-backends using linked-in driver.</p>
<p>
Own Id: OTP-7801</p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6.6</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
Decode of an open_type when the value was empty tagged
type encoded with indefinite length failed. This is now
corrected.</p>
<p>
Own Id: OTP-7759 Aux Id: seq11166 </p>
</item>
<item>
<p>
Encode of BIT STRING with size of exact length, on
compact_bit_string format in UNALIGNED PER failed when
value had the right size, i.e. no padding needed.</p>
<p>
Own Id: OTP-7763 Aux Id: seq11182 </p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6.5</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
For a BIT STRING with SIZE constraint higher than 255
compiled with <c>[per_bin,optimize,
compact_bit_string]</c> an improper io-list was created
and sent to the c-driver for complete encoding. This
error has been resolved.</p>
<p>
Own Id: OTP-7734 Aux Id: seq11170 </p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6.4</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
A a SEQUENCE OF with a type that is a CHOICE with
ellipses occurred falsely a compile error. The error
causing that is now removed.</p>
<p>
Own Id: OTP-7708 Aux Id: seq11136 </p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6.3</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
constrained number with a value-range greater than 512 now
has the proper interpretation of the values that causes
shift to the next number of units (bits), According to
limit condition <c>2^m < "range" =< 2^(m + 1)</c> then the
number of bits are m + 1.</p>
<p>
Own Id: OTP-7681 Aux Id: seq11114 </p>
</item>
</list>
</section>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
Can now handle default values of simple types that is
provided on its own format, i.e. not just as
asn1_DEFAULT.</p>
<p>
Own Id: OTP-7678 Aux Id: seq11114 </p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6.2</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
comparison of two value definitions failed due to new
module name field in valuedef record. It is now
corrected.</p>
<p>
Own Id: OTP-7608</p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6.1</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
Bug regarding propagation of parameters of parameterized
type fixed.</p>
<p>
Own Id: OTP-7174 Aux Id: seq10864 </p>
</item>
<item>
<p>
A bug, related to instantiation of a parameterized type
with a type definition in the parameter-list, has been
removed. The definition of the parameter type was in
another module than the instance definition causing
limited module info.</p>
<p>
Own Id: OTP-7299 Aux Id: seq10864 </p>
</item>
<item>
<p>
Removed hard-coded name that may cause name collision.</p>
<p>
Own Id: OTP-7322 Aux Id: seq10864 </p>
</item>
<item>
<p>
Object set of a class with id with properties UNIQUE
OPTIONAL and the id field is lacking in the object is for
now treated as a object without a unique identifier, i.e.
no table is generated for this object.</p>
<p>
Own Id: OTP-7332 Aux Id: seq10864 </p>
</item>
<item>
<p>
Compiler crashed when failed to handle a OID as
ValueFromObject.</p>
<p>
Own Id: OTP-7476 Aux Id: seq10999 </p>
</item>
<item>
<p>
A corrupted encoding may cause a loop when a buffer of at
least two bytes of zero matches tag and length of a SET
component. This behavior occurred only with decoder
generated with <c>ber</c> or <c>ber_bin</c> options. Now a
control breaks the loop.</p>
<p>
Own Id: OTP-7533</p>
</item>
<item>
<p>
Encode of BIT STRING longer than 255 bits with a
<c>SIZE(integer())</c> constraint caused a crash when
spec was compiled with <c>per_bin, optimize</c> options.</p>
<p>
Own Id: OTP-7602 Aux Id: seq11079 </p>
</item>
</list>
</section>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
Now supports REAL type of base 2 and 10</p>
<p>
Own Id: OTP-7166 Aux Id: seq10864 </p>
</item>
<item>
<p>
By the asn1 compiler option <c>{record_name_prefix
Name}</c> a prefix is chosen to the name of the record
generated in the .hrl and used in the generated .erl
files.</p>
<p>
Own Id: OTP-7204 Aux Id: seq10853 </p>
</item>
<item>
<p>
The TypeFromObject production now covered</p>
<p>
Own Id: OTP-7295 Aux Id: seq10468 </p>
</item>
<item>
<p>
Extended support for ObjectSetFromObjects. Production
occurred as a part of the RootElementSetSpec of the
ObjectSetSpec. Added also support for Exclusion of
Element in ObjectSetSpec.</p>
<p>
Own Id: OTP-7306 Aux Id: seq10864 </p>
</item>
<item>
<p>
Now implements RELATIVE-OID</p>
<p>
Own Id: OTP-7334 Aux Id: seq10864 </p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.6</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
Now is ordering, according to the canonical order, of
components in a SET added. Canonical order is described
in X.691 9.2 and X.680 8.6</p>
<p>
Own Id: OTP-7375 Aux Id: unaligned PER </p>
</item>
<item>
<p>
The precedence rules for extended constraints have been
misinterpreted. The rule says for instance that if there
are more than one constraint on a type that have
extension-mark, only the last of the extension-marks would
be kept. This affects the encoding of PER and is now
corrected.</p>
<p>
Own Id: OTP-7400 Aux Id: OTP-7335 </p>
</item>
<item>
<p>
A constrained number with a single-value constraint that
is extensible was falsely encoded/decoded in
aligned/unaligned PER. This is now corrected.</p>
<p>
Own Id: OTP-7403</p>
</item>
</list>
</section>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
The ASN.1 compiler has got a new backend supporting PER
UNALIGNED. Previously it was only support for PER
ALIGNED.</p>
<p>
Own Id: OTP-7335</p>
</item>
<item>
<p>
Now the asn1-compiler handles unions and intersections of
PermittedAlphabet constraints.</p>
<p>
Own Id: OTP-7374 Aux Id: unaligned PER </p>
</item>
<item>
<p>
With the undocumented option <c>no_final_padding</c> the
whole encoded message is not padded to a border of a
byte. Thus the returned encoded message is a
<c>bitstring</c>.</p>
<p>
Own Id: OTP-7407</p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.5.2</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
When duplicates of object fields were removed only one
table access function for each unique identifier value
was generated. This can occur when several object sets
are merged by use of ObjectSetFromObjects.</p>
<p>
Own Id: OTP-7263 Aux Id: seq10864 </p>
</item>
<item>
<p>
DER: For some complex types and components with reference
to type in several steps the default value check function
was not generated. This is now fixed.</p>
<p>
Own Id: OTP-7268 Aux Id: seq10684 </p>
</item>
<item>
<p>
Now is the tag in a tagged type as parameter propagated
to the instance.</p>
<p>
Own Id: OTP-7273 Aux Id: seq10864 </p>
</item>
</list>
</section>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
Added type T61String that is similar to TeletexString</p>
<p>
Own Id: OTP-7264 Aux Id: seq10864 </p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.5.1</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
A bug related to renaming of types has been fixed.This
occurred using the .set.asn functionality.</p>
<p>
Own Id: OTP-7149 Aux Id: seq10853 </p>
</item>
<item>
<p>
syntax error in ASN1 value now correctly shown</p>
<p>
Own Id: OTP-7154 Aux Id: seq10864 </p>
</item>
<item>
<p>
Now a COMPONENTS OF construct in a parameterized type
is expanded correctly</p>
<p>
Own Id: OTP-7155 Aux Id: seq10864 </p>
</item>
<item>
<p>
Now the asn1-compiler also handles empty SEQUENCE DEFAULT
values as <c>{}</c>.</p>
<p>
Own Id: OTP-7169 Aux Id: seq10864 </p>
</item>
<item>
<p>
Now SelectionType gets the tag of the selected type.</p>
<p>
Own Id: OTP-7171 Aux Id: seq10864 </p>
</item>
<item>
<p>
Correction of generated code for decode of an open type
in a SEQUECNE OF/ SET OF</p>
<p>
Own Id: OTP-7193 Aux Id: seq10875 </p>
</item>
</list>
</section>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
Misc improvements and bug corrections regarding default
values.</p>
<p>
Own Id: OTP-7199 Aux Id: seq10864 </p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.5</title>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
Now generating records in .hrl file for instances of
parameterized SEQUENCE or SET.</p>
<p>
Own Id: OTP-6835</p>
</item>
<item>
<p>
Optimization using bitstr in encode/decode functions. Active with
<c>[per_bin, optimize]</c> options.</p>
<p>
*** POTENTIAL INCOMPATIBILITY ***</p>
<p>
Own Id: OTP-6882</p>
</item>
</list>
</section>
</section>
<section><title>Asn1 1.4.6</title>