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<?xml version='1.0' encoding='utf-8' ?>
<!DOCTYPE section PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
<!ENTITY % BOOK_ENTITIES SYSTEM "Architecture_and_Design.ent">
%BOOK_ENTITIES;
]>
<section id="sect-Kolab_Product_Series" lang="en-US">
    <title>Kolab Product Series</title>
     <para>
        Kolab Groupware consists of free software components, each of which are available from various upstream development and support project organizations, including Linux distributions.
    </para>
     <para>
        The Kolab Groupware developers, community members and Kolab Systems engineering and support staff maintain many of the packages related to Kolab with the Linux distributions through which those packages are available.
    </para>
    <para>
        The Kolab software repositories can therefor include only those software components, or those specific versions of software components, that differentiate from what is available in the upstream Linux distribution software repositories, and possibly recommended or required additional software repositories.
    </para>
    <para>
        Product series are versioned, each of them created to provide a sustainable stream of updates to the individual software components included in that product serie.
    </para>
    <para>
        The convention for <emphasis>Server Product Versioning</emphasis> is subject to the guidelines proposed and accepted as <ulink url="http://wiki.kolab.org/KEP:5">KEP #5</ulink>.
    </para>
    <section id="sect-Kolab_Product_Series-Product_Streams">
        <title>Product Streams</title>
        <para>
            Two different product streams exist, a <literal>community</literal> edition and an <literal>enterprise</literal> edition.
        </para>
        <para>
            The following are consequences of using the community edition of kolab 2.4 (as opposed to the enterprise edition):
        </para>
        <para>
            <orderedlist>
                <listitem>
                    <para>
                        No debuginfo packages are available, which would be needed in case stack traces need to be generated for binary compiled programs such as mysql, openldap, cyrus-imapd or php.
                    </para>

                </listitem>
                <listitem>
                    <para>
                        The packages are not signed, and therefor the authenticity of the packages cannot be verified.
                    </para>

                </listitem>
                <listitem>
                    <para>
                        The packages are made available through HTTP only, as opposed to HTTPS, and therefor the authenticity cannot be verified.
                    </para>

                </listitem>
                <listitem>
                    <para>
                        No builds other then the latest is made available for any package. Rolling back a software update foo-1.0-2.el5 to previously installed software version foo-1.0-1.el5 after a failed update is therefor not possible unless a copy of foo-1.0-1.el5 had been preserved.
                    </para>

                </listitem>
                <listitem>
                    <para>
                        No security errata is sent out.
                    </para>

                </listitem>

            </orderedlist>

        </para>

    </section>

     <section id="sect-Kolab_Product_Series-Repository_Stages">
        <title>Repository Stages</title>
         <para>
            4 different repository stages exist, each of them indicating the expected level of stability, and point-in-time release.
        </para>
         <para>
            The <literal>release</literal> and <literal>updates</literal> repositories contain the most stable software (community edition) which is supported (enterprise edition).
        </para>

    </section>


</section>