Lucene keeps multiple versions of its API doc online at http://lucene.apache.org/java/X_Y_Z/api/all/index.html for version X.Y.Z. I am finding this very useful when comparing different versions. This is also good because the javadoc comments that I write for my software can reference the API comments of the exact version of Lucene that I am using.
At Solr site, I can only find the API doc of the trunk build. I cannot find 1.3.0 API doc, for example. Can Solr site also maintain the API docs for the past stable versions ? -kuro