<?xml version="1.0" encoding="utf-8" ?> <!DOCTYPE chapter SYSTEM "chapter.dtd"> <chapter> <header> <copyright> <year>2014</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>Versions</title> <prepared></prepared> <responsible></responsible> <docno></docno> <approved></approved> <checked></checked> <date>2014-02-19</date> <rev></rev> <file>versions.xml</file> </header> <marker id="versions section"></marker> <section> <title>OTP Version</title> <p>As of OTP release 17, the OTP release number corresponds to the major part of the OTP version. The OTP version as a concept was introduced in OTP 17. The version scheme used is described in detail in <seealso marker="#version_scheme">Version Scheme</seealso>.</p> <p>OTP of a specific version is a set of applications of specific versions. The application versions identified by an OTP version corresponds to application versions that have been tested together by the Erlang/OTP team at Ericsson AB. An OTP system can, however, be put together with applications from different OTP versions. Such a combination of application versions has not been tested by the Erlang/OTP team. It is therefore <em>always preferred to use OTP applications from one single OTP version</em>.</p> <p>Release candidates have an <c>-rc<N></c> suffix. The suffix <c>-rc0</c> is used during development up to the first release candidate.</p> <section> <title>Retrieving Current OTP Version</title> <p>In an OTP source code tree, the OTP version can be read from the text file <c><OTP source root>/OTP_VERSION</c>. The absolute path to the file can be constructed by calling <c>filename:join([<seealso marker="kernel:code#root_dir/0">code:root_dir()</seealso>, "OTP_VERSION"])</c>.</p> <p>In an installed OTP development system, the OTP version can be read from the text file <c><OTP installation root>/releases/<OTP release number>/OTP_VERSION</c>. The absolute path to the file can by constructed by calling <c>filename:join([<seealso marker="kernel:code#root_dir/0">code:root_dir()</seealso>, "releases", <seealso marker="erts:erlang#system_info_otp_release"> erlang:system_info(otp_release)</seealso>, "OTP_VERSION"]).</c></p> <p>If the version read from the <c>OTP_VERSION</c> file in a development system has a <c>**</c> suffix, the system has been patched using the <seealso marker="../installation_guide/OTP-PATCH-APPLY"><c>otp_patch_apply</c></seealso> tool. In this case, the system consists of application versions from multiple OTP versions. The version preceding the <c>**</c> suffix corresponds to the OTP version of the base system that has been patched. Notice that if a development system is updated by other means than <c>otp_patch_apply</c>, the file <c>OTP_VERSION</c> can identify an incorrect OTP version.</p> <p>No <c>OTP_VERSION</c> file is placed in a <seealso marker="create_target">target system</seealso> created by OTP tools. This since one easily can create a target system where it is hard to even determine the base OTP version. You can, however, place such a file there if you know the OTP version.</p> </section> <section> <title>OTP Versions Table</title> <p>The text file <c><OTP source root>/otp_versions.table</c>, which is part of the source code, contains information about all OTP versions from OTP 17.0 up to the current OTP version. Each line contains information about application versions that are part of a specific OTP version, and has the following format:</p> <pre> <OtpVersion> : <ChangedAppVersions> # <UnchangedAppVersions> :</pre> <p><c><OtpVersion></c> has the format <c>OTP-<VSN></c>, that is, the same as the git tag used to identify the source.</p> <p><c><ChangedAppVersions></c> and <c><UnchangedAppVersions></c> are space-separated lists of application versions and has the format <c><application>-<vsn></c>.</p> <list type="bulleted"> <item><c><ChangedAppVersions></c> corresponds to changed applications with new version numbers in this OTP version.</item> <item><c><UnchangedAppVersions></c> corresponds to unchanged application versions in this OTP version.</item> </list> <p>Both of them can be empty, but not at the same time. If <c><ChangedAppVersions></c> is empty, no changes have been made that change the build result of any application. This could, for example, be a pure bug fix of the build system. The order of lines is undefined. All white-space characters in this file are either space (character 32) or line-break (character 10).</p> <p>By using ordinary UNIX tools like <c>sed</c> and <c>grep</c> one can easily find answers to various questions like:</p> <list type="bulleted"> <item><p>Which OTP versions are <c>kernel-3.0</c> part of?</p> <p><c>$ grep ' kernel-3\.0 ' otp_versions.table</c> </p></item> <item><p>In which OTP version was <c>kernel-3.0</c> introduced?</p> <p><c>$ sed 's/#.*//;/ kernel-3\.0 /!d' otp_versions.table</c> </p></item> </list> <p>The above commands give a bit more information than the exact answers, but adequate information when manually searching for answers to these questions.</p> <warning><p>The format of the <c>otp_versions.table</c> might be subject to changes during the OTP 17 release.</p></warning> </section> </section> <section> <title>Application Version</title> <p>As of OTP 17.0 application versions use the same <seealso marker="#version_scheme">version scheme</seealso> as the OTP version. Application versions part of a release candidate will however not have an <c>-rc<N></c> suffix as the OTP version. Also note that a major increment in an application version does not necessarily imply a major increment of the OTP version. This depends on whether the major change in the application is considered as a major change for OTP as a whole or not.</p> </section> <section> <title>Version Scheme</title> <marker id="version_scheme"/> <note><p>The version scheme was changed as of OTP 17.0. This implies that application versions used prior to OTP 17.0 do not adhere to this version scheme. <seealso marker="#otp_17_0_app_versions">A list of application versions used in OTP 17.0</seealso> is included at the end of this section</p></note> <p>In the normal case, a version is constructed as <c><Major>.<Minor>.<Patch></c>, where <c><Major></c> is the most significant part.</p> <p>However, more dot-separated parts than this can exist. The dot-separated parts consist of non-negative integers. If all parts less significant than <c><Minor></c> equals <c>0</c>, they are omitted. The three normal parts <c><Major>.<Minor>.<Patch></c> are changed as follows:</p> <list type="bulleted"> <item><c><Major></c> - Increases when major changes, including incompatibilities, are made.</item> <item><c><Minor></c> - Increases when new functionality is added.</item> <item><c><Patch></c> - Increases when pure bug fixes are made.</item> </list> <p>When a part in the version number increases, all less significant parts are set to <c>0</c>.</p> <p>An application version or an OTP version identifies source code versions. That is, it implies nothing about how the application or OTP has been built.</p> <section> <title>Order of Versions</title> <p>Version numbers in general are only partially ordered. However, normal version numbers (with three parts) as of OTP 17.0 have a total or linear order. This applies both to normal OTP versions and normal application versions.</p> <p>When comparing two version numbers that have an order, one compare each part as ordinary integers from the most significant part to less significant parts. The order is defined by the first parts of the same significance that differ. An OTP version with a larger version includes all changes that are part of a smaller OTP version. The same goes for application versions.</p> <p>In general, versions can have more than three parts. The versions are then only partially ordered. Such versions are only used in exceptional cases. When an extra part (out of the normal three parts) is added to a version number, a new branch of versions is made. The new branch has a linear order against the base version. However, versions on different branches have no order, and therefore one can only conclude that they all include what is included in their closest common ancestor. When branching multiple times from the same base version, <c>0</c> parts are added between the base version and the least significant <c>1</c> part until a unique version is found. Versions that have an order can be compared as described in the previous paragraph.</p> <p>An example of branched versions: The version <c>6.0.2.1</c> is a branched version from the base version <c>6.0.2</c>. Versions on the form <c>6.0.2.<X></c> can be compared with normal versions smaller than or equal to <c>6.0.2</c>, and other versions on the form <c>6.0.2.<X></c>. The version <c>6.0.2.1</c> will include all changes in <c>6.0.2</c>. However, <c>6.0.3</c> will most likely <em>not</em> include all changes in <c>6.0.2.1</c> (note that these versions have no order). A second branched version from the base version <c>6.0.2</c> will be version <c>6.0.2.0.1</c>, and a third branched version will be <c>6.0.2.0.0.1</c>.</p> </section> </section> <section> <title>OTP 17.0 Application Versions</title> <marker id="otp_17_0_app_versions"/> <p>The following list details the application versions that were part of OTP 17.0. If the normal part of an application version number compares as smaller than the corresponding application version in the list, the version number does not adhere to the version scheme introduced in OTP 17.0 and is to be considered as not having an order against versions used as of OTP 17.0.</p> <list> <item><c>asn1-3.0</c></item> <item><c>common_test-1.8</c></item> <item><c>compiler-5.0</c></item> <item><c>cosEvent-2.1.15</c></item> <item><c>cosEventDomain-1.1.14</c></item> <item><c>cosFileTransfer-1.1.16</c></item> <item><c>cosNotification-1.1.21</c></item> <item><c>cosProperty-1.1.17</c></item> <item><c>cosTime-1.1.14</c></item> <item><c>cosTransactions-1.2.14</c></item> <item><c>crypto-3.3</c></item> <item><c>debugger-4.0</c></item> <item><c>dialyzer-2.7</c></item> <item><c>diameter-1.6</c></item> <item><c>edoc-0.7.13</c></item> <item><c>eldap-1.0.3</c></item> <item><c>erl_docgen-0.3.5</c></item> <item><c>erl_interface-3.7.16</c></item> <item><c>erts-6.0</c></item> <item><c>et-1.5</c></item> <item><c>eunit-2.2.7</c></item> <item><c>gs-1.5.16</c></item> <item><c>hipe-3.10.3</c></item> <item><c>ic-4.3.5</c></item> <item><c>inets-5.10</c></item> <item><c>jinterface-1.5.9</c></item> <item><c>kernel-3.0</c></item> <item><c>megaco-3.17.1</c></item> <item><c>mnesia-4.12</c></item> <item><c>observer-2.0</c></item> <item><c>odbc-2.10.20</c></item> <item><c>orber-3.6.27</c></item> <item><c>os_mon-2.2.15</c></item> <item><c>ose-1.0</c></item> <item><c>otp_mibs-1.0.9</c></item> <item><c>parsetools-2.0.11</c></item> <item><c>percept-0.8.9</c></item> <item><c>public_key-0.22</c></item> <item><c>reltool-0.6.5</c></item> <item><c>runtime_tools-1.8.14</c></item> <item><c>sasl-2.4</c></item> <item><c>snmp-4.25.1</c></item> <item><c>ssh-3.0.1</c></item> <item><c>ssl-5.3.4</c></item> <item><c>stdlib-2.0</c></item> <item><c>syntax_tools-1.6.14</c></item> <item><c>test_server-3.7</c></item> <item><c>tools-2.6.14</c></item> <item><c>typer-0.9.6</c></item> <item><c>webtool-0.8.10</c></item> <item><c>wx-1.2</c></item> <item><c>xmerl-1.3.7</c></item> </list> </section> </chapter>