Do ivy dependency revisions have anything to do with svn's?

With no background on ivy dependencies I'm trying to build nutch with solr 4.0, but I'm not sure how to change the nutch ivy dependency on solr in the ivy.xml:开发者_JS百科

<dependency org="org.apache.solr" name="solr-solrj" *rev="**1.4.1**"*
conf="*->default" />

I've no clue on where those revisions are set, as they certainly don't correspond to svn revisions. Neither do they correspond to maven versions (the version would be 4.0-SNAPSHOT). So where would I typically find the available ivy revisions? Also, is it possible to checkout the dependency against a given svn revision? At that revision it works as I want, but I'm not sure about the latest instead.

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Neither do they correspond to maven versions (the version would be 4.0-SNAPSHOT). So where would I typically find the available ivy revisions?

False, they correspond.

So where would I typically find the available ivy revisions? 

Maven central repo (solr in maven central repo)

Also, is it possible to checkout the dependency against a given svn revision? mvn install locally, and then refer to your snapshot. For Solr:

<dependency org="org.apache.solr" name="solr-solrj" rev="4.0-SNAPSHOT"
            conf="*->default"/>