title: Solr metadata index
body: <p>I am new with Solr and I am extracting metadata from binary files through URLs stored in my database.  I would like to know what fields are available for indexing from PDFs (the ones that would be initiated as column=””).  I would also like to know how to create customized fields in Solr.  How is that implemented and mapped to specific metadata coming from the files.  If someone has a code snippet that could show me it would be greatly appreciated.
  Thank you in advance.</p>