There is a preconference on Lucene and Solr before the Code4lib conference. Because of that Andrew Nagy has made available his MARCXML2SOLR XSLT document. If you have some MARC records in XML and want to get them into a format Solr understands, now you can. MarcEdit, among other tools, will get your MARC into MARCXML format. Can't make it to the preconference, use this tool to play along at home.