Such a notation would be much more useful if it were

        1. standardized and
        2. unambiguous

My personal preference would be "something like"

        groupId:artifactId(classifier):version;extension[scope]

This way, the classifier, the extension, and the scope could be optional 
simplifying this to

        groupId:artifactId:version    (defaulting to no classifier, 
extension=jar, scope=compile)

Examples:

        junit:junit:3.8.1
        junit:junit():3.8.1
        junit:junit:3.8.1;jar
        junit:junit:3.8.1;[compile]
        junit:junit:3.8.1;jar[compile]
        junit:junit():3.8.1;jar[compile]

Whatever is done, having multiple conflicting ambiguous versions of this is 
just bad design.  The final choice should probably be consistent with the URI 
specification http://labs.apache.org/webarch/uri/rfc/rfc3986.html   (in this 
case, a path with scheme=GAV, a blank authority, and no query or fragment)  .  
It should be registered.

        i.e., GAV:junit:junit:3.8.1

Stan

PS.  The full set of coordinates falls into two categories:

        1. name the artifact  (group,artifact,version,classifier)
        2. meta-data about the artifact
                - assistance to help find it in a repo  (extension)
                - restrict its use  (scope)

Here, I have deliberately separated (1) from (2) by a ";"

> Luke Patterson wrote:
> I was looking more for a URN for Maven coordinates, which is slightly
> different than the flattened form of <dependency> elements.  e.g. the
> <scope> portion isn't part of what I'm looking for, it is more a statement
> of how I rely upon it

>> Brian Fox-3 wrote:
>> Group:artifact:version:classifier:extension is pretty common
>>



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