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From Archie Cobbs <>
Subject Re: Question about documentation
Date Wed, 06 Oct 2010 02:25:42 GMT
On Tue, Oct 5, 2010 at 12:03 PM, David Sills <>wrote:

>    <dependencies>
>        <dependency org="org.apache.log4j" name="log4j" rev="1.2.15"
> conf="javac,test->default"/>
>        <dependency org="net.sourceforge.jibx" name="jibx" rev="1.2.2"
> conf="base->runtime-xpp3,extras;bind->bind"/>
>        <dependency org="org.xmlpull.xpp3" name="xpp3" rev=""
> conf="javac->default"/>
>    </dependencies>
> I understand that this means:
> 1. There are 3 dependencies for the module.
> 2. The JAR file log4j-1.2.15 is required in some cases.
> 3. The JAR file jibx-1.2.2 is required in some cases.
> 4. The JAR file xpp3- is required in some cases.

Actually that's not quite right. The dependencies are not talking about JAR
files, they are talking about modules.


*module* = some software with a name; has multiple *revisions*

*revision* = a specific release/instance of a module; contains one or more *

*artifact* = a file, often a JAR but can be anything (e.g., XML
file, etc.)

*configuration* = a name that you give to some subset of the *artifacts* in
a *revision*; if none are defined "default" is the default and contains
everything; also determines how *dependencies* are resolved (see *configuration

*dependency* = depend relationship between a *revision* of a *module* and
other *modules*; has a *configuration mapping*

*configuration mapping* = in a given *dependency*, describes which *
configurations* of the other *module* are required for each
*configuration*of the current


Archie L. Cobbs

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