The installer supports distributions, applications and packages. When installing a new application, the installer asks the root distribution server for available distributions. After the user chooses a distribution, the installer looks which applications are available for this distribution. When installing an application, the installer downloads the required packages for the application and installs them.
With this relationship between distributions, applications and packages, you have a certain package network, which can be distributed on several servers and mirrored for load balancing.
ZZ/OSS Installer can be seen as a phpdriven, webbased client for this package network. I can also imagine, that there will be a commandline client or a GUI client for X written in C supporting more than just webbased applications.
Distributions
A distribution is a set of applications. In the package network, distribution metadata and the distribution itself are splittet.
Here is an sample for the 
distributions.xml file. This file contains only information which distributions available and where to find the corresponding distribution.xml.
The distribution.xml contains information about the distribution, e.g. where to find the list of applications.
Applications
An application is a set of packages. Again, application metadata and application itself are splittet.
The applications.xml file contains information, which applications are available and where to find the corresponding application.xmlfile, containing more information about the application itself, and packages.xml file, containing available packages for the application.
The application.xml file also defines, which packages are available for this application (a package itself is not application specific !) and where to install them.
Packages
A package contains files, scripts, plugins and data for an application and is the smallest element, the installer supports.
The packages.xml file for an application defines the available packages and where to find information about the package (package.xml file) and the real file source (tgz file).
It is possible to add a package.xml to e.g. an existing pear package, so it will fit for a specific application and use the original pear tgz (which is placed on a mirror somewhere in the net) as filesource. This will reduce bandwith.
The package.xml file contains information about the package, defines the files to copy and plugins to execute!
Last edited on Friday, March 5, 2004 8:51:47 am.
 
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