[tycho-user] Which repository providing the context of the build?

["V. Mark Lehky" <mark.lehky@xxxxxxxxx>]

Which repository is correct?

The http://www.eclipsecon.org/2013/sessions/building-eclipse-plug-ins-and-rcp-applications-tycho
demo says:
        <repository>
            <id>eclipse-platform-m6</id>
            <layout>p2</layout>
            <url>http://download.eclipse.org/eclipse/updates/4.3</url>
        </repository>
But that URL produces "404 File not found." However, that demo does
run for me with just this URL.

The http://wiki.eclipse.org/Tycho/How_Tos/Dependency_on_pom-first_artifacts
demo says:
        <repository>
            <id>helios</id>
            <layout>p2</layout>
            <url>http://download.eclipse.org/releases/helios</url>
        </repository>
But since I am using Kepler, I guessed it to be:
        <repository>
            <id>kepler</id>
            <layout>p2</layout>
            <url>http://download.eclipse.org/releases/kepler</url>
        </repository>

The http://wiki.eclipse.org/Tycho/Reference_Card says:
        <repository>
            <id>eclipse-indigo</id>
            <layout>p2</layout>
            <url>http://download.eclipse.org/releases/indigo</url>
        </repository>
But, again, since I am using Kepler, I guessed it to be:
        <repository>
            <id>eclipse-kepler</id>
            <layout>p2</layout>
            <url>http://download.eclipse.org/releases/kepler</url>
        </repository>

Are they all just links to the same thing? Or is one "more" correct
than another?
They all download something, but my eclipse-project still fails due to
unresolved dependencies. Since I have no idea why, I am checking every
single thing now.

TIA for all the help. ML.